As a child, did you ever play that game where you sit in a circle and one person is responsible for whispering something into one persons ear, and that message gets relayed around the circle? Wasn’t it always funny to see what the final message received would be? Oh and how it would have morphed as it was processed and conveyed by each individual in the group.
This is what I see when I look at the WordPress Security Ecosystem.
The biggest challenge the ecosystem faces is product and service confusion. This is compounded by a variety of factors. I often categorize them, generally into two buckets – deliberate and non-deliberate confusion. For me deliberate product confusion comes often by marketeers and those looking to make a quick buck on what they perceive to be the next virtual gold rush. While non-deliberate confusion is introduced by those that mean well, or were once affected, and have come up with a genuine solution that likely addresses a very narrow issue.
An easy way to better appreciate this is to look at the WordPress Security Plugins specifically, as they’re tangible and that makes it easier to truly appreciate the nuances of the security space.
Contrary to popular belief, not all plugins are the same or created equal and you can’t compare them as that would not be an apples to apples comparison.
Interestingly enough, there are often pretty unique differentiating factors between each of the security plugins in the market, although in many cases there are one to one correlations. Human nature is also one of the contributing factors to confusion. As humans we are often configured to go the easiest route. We’re always looking for the one with the biggest audience, or the one that is pushed on us the most. If everyone else is using it, I should too. Rarely do we truly understand or give much thought to this phenomena.
The WordPress Security Plugin Ecosystem
If you were to go to the WordPress repository and do a quick search for Security you will likely find over 2,471 plugins that all have some keyword associated with Security. When writing this post, there were 33,213 plugins in the repo; that’s roughly 7% of the available plugins in the repo. If you do a search on google for WordPress Security Plugin you will find somewhere upward of 7,230,000 results on the topic.
How is any WordPress user supposed to make sense of this?
Below I will introduce four distinct categories I want you to think about when considering a WordPress Security Plugin. If you can leverage these categories, it will hopefully:
- Allow you to ask better questions.
- Employ the right solution for your needs.
- Provide better clarity into the tools you’re employing.
WordPress Security Plugin Categories
First we have to understand the type of plugins that exist. Yes, there is a very distinct categorization within the security domain, and each of the plugins fit into one domain predominantly, some are multi-faceted, overlapping other domains, but few actually do this well.
If I label a security plugin below in a specific category it’s because from my tests and reviews it’s where I see it fit. It doesn’t mean that the developer would not like it to fit in others, I just felt it was most effective where I place it. It also doesn’t mean that it won’t satisfy your specific situation. My writing is more general and is meant to address security as a whole, not specific configurations.
Here is a breakdown of the WordPress Security Plugin categories:

To understand this categorization you have to understand the Information Security wheel. The common wheel has always been defined by Protection, Detection, and Response. For Websites, and WordPress specifically I am extending it to include functions that large enterprise recognize and account for, but everyday website owners don’t. It’s such a problem, it deserves special attention.
Our categorizations are based on this model:

As I mentioned before, rarely do you have one single plugin that satisfies all aspects of security. It is imperative you understand this as a website owner. Understanding the security lifecycle helps you answer the question – which WordPress Security plugin am I looking for?
WordPress Security Plugin – Prevention Category
These plugins look to provide some level of prevention, otherwise known as a perimeter defense for your website. Their objective is to stop hacks from happening. The buzz word today is Website Firewall. It’s the idea that you can function as a filter of sorts for all incoming traffic to your website. The concept of firewalls is not new, they’ve been employed for years across the IT spectrum. Almost all the routers you are using to read this blog are employing some form of a firewall.
The biggest weakness you will find with these type of plugins is they are often 1) behind the power curve and 2) are limited to working at the application layer. In other words, the attack has to hit the server for them to respond.
There are a few plugins that like to employ the terminology of a Website Firewall, but are far from it. Others actually function very well. The BlogVault team put together a very good article on this subject a few weeks back, they were focused on a different issue, but their point is good. The types of tests they ran were in fact indicative of the types of website attacks a Firewall should prevent.
This includes things like:
- Remote Command Execution
- Cross Site Scripting
- Remote File Inclusion / Local File Inclusion Attacks
- Exploitation of Software Vulnerabilities
- Denial of Service (DoS)
- Brute Force Attempts
Why these are so important to you as the end-user is best illustrated in some of the latest WordPress Plugin Security disclosures, like the Slider Revolution Plugin, Custom Contact Forms Plugin, MailPoet Newsletter Plugin, or the recent abuse of XMLRPC in WordPress core.
What you will see, however, is this evolution in these plugins leveraging a concept of Virtual Patching. In short, as these disclosures get released, the plugin developers will scurry to push out a plugin update and say that you are now patched and protected.
The big thing you hear these days is specific to Brute Force protection. In the past the big solution was the Limit Logins plugin, now it’s a staple in almost every security plugin with the exception of Sucuri’s (we’ve removed it from ours). You then saw really great tools like BruteProtect, which was then acquired by Automattic, and will likely be pushed for free to all JetPack users. You also have a variety of others like iThemes Security, WordFence, Login Security Solutions and so many more that are trying to tackle this Brute Force challenge.
However, this should not be confused with what we categorize as an effective prevention plugin. This hyper focus on one very small attack vector provides a very false sense of security to most end-users. It’s why we don’t focus on that specific feature of a prevention security plugin.
WordPress Security Plugin – Detection Category
The act of Detection has always been the red-headed step child of security, not just in WordPress but in Security at large. It never gets the attention it deserves, and often the response is, “If I am protecting, why do I need to be detecting?” The answer is actually simpler than most realize, yet many refuse to accept it.
Protection is not a 100% solution, it never has been, and never will be. Imagine a world where your Home or Company Firewall was 100%, why would you need an AntiVirus product?
Protection is great for the known issues, and not so great for the unknown issues. What we all know, or should, is that with enough time and resources, crackers have the ability to find new points of entry (i.e., identify new attack vectors). This is where things like Detection come into play. While we have the utmost confidence in our ability to protect, we still want to ensure we have a mechanism available to use to detect in the event anything gets past our perimeter defense.
These plugins attempt to do this. They do it via a number of mechanisms, some do traditional File Integrity Checks, some do malware scans, some combine the two. As for which one is better? It just depends. The person that used one plugin and used it to detect their one infection will jump over mountains to say how awesome that one is. The one that used another and was successful with that one will likely do the same thing. It starts to come down to who has the bigger audience and the bigger evangelists.
You will find some that are free, and some that are not so free. Some are fully automated, and some are supported by humans. Where these plugins often become the big hits is if they are able to satisfy your immediate problem, specifically the problem being that you are infected.
What you have to remember is that there are many different types of infection and symptoms to account for. Do you fit any of these symptoms?
- Google, Yahoo, Bing have Blacklisted your website
- Clients are complaining that your website is being flagged by their AntiVirus
- Your host has disabled your website because of a Security issue
- Google / Bing search is showing Viagra, Levitra or other Pharmaceutical ads in the search results
- You are plagued with reinfections
- You see “This site is Hacked” or “This site may be compromised” on Google search
- People are complaining that your website is redirecting on their mobile devices, notebooks, desktops
- Something just feels off – you’re seeing weird activity, things are popping up or just want a second pair of eyes
These are just a small subset of issues that Detection plugins that exist today will do little to address, but are imperative to you as a website owner. Remember also that the effectiveness of these plugins is strictly determined by the order in which they are installed.
For instance, if the plugin is based on integrity checks, then it needs to be installed on a fresh install so that it can create a baseline to which to check from.
This category can also be extended to account for what are known as Vulnerability scanners, but with these you have to be very careful. Very few vulnerability scanners actually do vulnerability scans. Many will simply look for versions of themes and plugins that have known issues, and use their plugin to identify if you have it installed. Those that do try to scan for real vulnerabilities live are often ineffective because vulnerability scanning isn’t just about the code, it’s about stress testing as well. The tool is meant to be part of a process.
More often than not, I recommend non-tech / non-dev users stay clear of vulnerability scanners. They often generate a lot of noise and when it comes down to it, you really have no idea what to do next. It causes more headaches than you will want to deal with.
WordPress Security Plugin – Auditing Category
If Detection is the red-headed step-child, then Auditing is the Foster kid that no one wants. It’s the harsh reality. We live in a time where everything is supposed to be easy. You install this plugin and you have a carousel. You install this plugin and all your posts go to all your favorite social outlets. What’s this thing about auditing? You mean I have to actually actively monitor my websites activity, like really administer the website?
The answer is a resounding YES.
Contrary to popular belief, security is, fortunately or unfortunately, not a set it and forget it kind of thing. You have to invest time into the process. Get acclimated with what is going on, who is logging in, what is changing, when are they changing…
As the administrator of your website you should be asking questions like:
- Who is logging in?
- Should they be logging in?
- Why are they changing that post?
- Why are they logging in when they should be sleeping?
- Who installed that plugin?
What many don’t realize is that through basic administration, like auditing, you can sometimes achieve greater success in identifying, thwarting or responding to a compromise.
Food for thought.
WordPress Security Plugin – Utility Category
This is perhaps the widest bucket of security plugins, and the one that most of you reading this post likely employ. It’s perhaps the most diverse bucket of the entire WordPress Security Plugin ecosystem. There are only a few big ones that stick out, and few specific plugins that can be easily wrapped into this category.
We also reserve this category for toolsets like Backups or Maintenance plugins that address specific security functions. Think plugins that allow you to create backups, store locally or remotely, or plugins that allow you to administer and manage your website remotely. This of course is one small subcategory within this group.
The biggest plugins in this category are those we consider to be the swiss army knives of the security landscape. These plugins can be exhaustive in their security configuration options. They have every possible configuration you could or might ever want to employ. These plugins are not for the faint of heart.
I like to categorize these plugins as the Do It Yourself (DIY) security plugin, similar to those TV shows that my wife adores. You know, the ones where couples try to refurbish a house or landscape their backyard. Think of these plugins as your hardware store, or your very fancy toolbox; for the everyday user they will likely cause more issues than they are worth, but for the active administrator it might be the thing you have been looking for.
Especially in the WordPress community, built by those that love to tinker, these suites fall into that same user mindset. If there is something you want to do, but don’t want to it manually, it’s likely that one of these swiss-army knives of the WordPress Security Plugin ecosystem will enable you to do it. If it doesn’t, I can assure you they’d love to know what it is so that they can add it as a feature.
Which is Better For Your WordPress Security?
This is undoubtedly the question that many are asking, and likely the only reason you have read this far. The harsh reality, though, is that there isn’t a clear answer and the best answer is always dependent on your specific scenario. I enjoy reading the hacked and malware forums on .org because it is never more blatantly obvious to me how disconnected we are when it comes to security.
Rarely do we truly understand the user’s issue. We simply regurgitate what we have heard, not from experience, but from what others have said. We are so apt to not promoting an effective solution, regardless of whether it’s actually good for the user, because of sensitivities, yet we forget what the end-user is going through. We would rather spend hours / days / weeks having them try 150 different things, than encourage them to employ something that could get them functioning quickly. This is not just reserved for the .org, but for various WordPress communities like Facebook, Twitter, etc…
What it comes down to is what kind of end-user are you? What state of mind are you in and what are you looking to accomplish?
Here are a few different personas, or audience types, that you might fall into, and depending which is applicable to you the guidance and insight will be slightly different.
Here are 7 different questions that you can ask yourself when looking for a WordPress Security Plugin. They are not meant to be the only questions, but likely the most common:
Your Security Persona Defines The Best Solution
1. Are you a business owner that only cares about your website running and don’t want anything to do with security?
If so, then you’re likely not going to want to leverage any of these plugins and should leave your security needs to professionals that can help you.
Yes, I link to our company, but there are alternatives. The point is, find a professional and employ them, and don’t look for the one that says they are an expert, look for the ones that have the appropriate experience.
I know how to change my oil, yet I still take it in every 3 / 5 months to have it taken care of. I value my time too much to waste it. I presume the same applies to you and your business.
2. Are you currently infected?
You want to stick with Detection plugins, one very interesting plugin that works well enough for the common issues is the Anti-Malware (Get Off Malicious Scripts). You can also make use of services like our SiteCheck Security Scanner and Unmaskparasites to scan your website for malware. I should also reference the WordFence plugin as a decent Detection plugin. It’s had its ups and downs in its detection in the past, and still has its limitations but for many of the common issues, it works fine (although be mindful of false positives and the resource impacts inherent to them).
3. Are you Blacklisted by Google, Yahoo, Bing or something similar?
None of these plugins are going to help you. You’ll want to leverage a professional service to 1) identify the problem and 2) resubmit your website for review. Or you can do it yourself.
4. Do you like to tinker and want the ability to configure everything you find on those “The 10 Things You Need to Do To Harden Your WordPress Website” blog posts?
Then you’re going to want to stick with Utility plugins. One of our favorites, and best maintained, will be the iThemes Security (formerly Better WP Security) plugin. Mind you, this plugin has a lot of options. If you don’t know what you’re doing, it’s likely not going to be for you, so proceed at your own will.
5. Are you looking to stop hackers from getting in?
Then you are looking for Prevention plugins. We generally don’t recommend Website Firewalls that operate at the application layer, for a variety of reasons. There are a few out there that leverage the name, but are likely providing you a false sense of security. We’d recommend you leverage a service based product for this. It can range from services like those at CloudFlare, Incapsula or Sucuri. Do your homework and research the one that you feel will be most effective.
The one caveat to this will be Brute Force protection. It’s important to take some time to understand what Brute Force attacks are, and how they differ from other types of attacks – like Denial of Service. As of late, there has been a lot of hollering across the inter webs on this new, yet very old, attack method. There were arguments at one point that network latency was too big of an issue for Brute Force attacks to be realistic or impactful. The times have obviously changed and that’s no longer the case.
It’s become such a big issue that you see everyone getting into the game. It will likely be the new security gold rush as everyone rushes to implement a solution for Brute Force attempts. As this happens, we’ll continue to see an evolution in the attack spectrum, a case in point would be the recent attacks on XMLRPC that allowed the user to Brute Force your application while bypassing your wp-admin. In this scenario, none of the security plugins protecting you from BF were addressing the issue, until disclosed. Allow me to be clear though, the fact that they can be updated to address the issue once identified is pretty good as well.
6. Do you want to know what is going on with your website at any given time??
Then you want to look at Auditing plugins. Our favorite is the Sucuri Security – Auditing, Malware Scanner and Hardening Plugin. Granted it’s a bit selfish, but rightfully so we think.
Good administration is critical to Good Security posture, and we all know that security is based on risk management. Where risk is reduced, our posture is increased.
7. Are you none of the above, and are only looking to improve your security posture?
Then the recommendation is to leverage a little bit from each domain. It’s ok to have multiple security plugins. Each, as you can see above, is designed to address different aspects of the security lifecycle.
The thing to remember, however, is that each of these plugins have one common denominator. They are tools designed to help you manage and administer your website better. They are not the end all be all when it comes to security. If there were such a thing, there would be only one solution.






![Malware comes in many different varieties. Analyst Krasimir Konov is on this month’s Sucuri Sit-Down to help keep them all straight. From malicious iframes to SEO spam, join host Justin Channell as he racks Krasimir’s brain on all the different types of malware. Also, Krasimir discusses his recent blog post about a malicious cURL downloader, and Justin breaks down the latest website security news, including patched plugins you should update. Podcast Transcript Justin Channell: Hello, and welcome to the Sucuri Sit Down. I'm your host, Justin Channell, and this is a monthly podcast about website security, where we get in-depth with the malware removal experts here at Sucuri. Later in the show, I'll have our analyst Krasimir Konov to chat about some different types of malware, but first, let's take a look at other topics we've published on our blog and Sucuri labs notes this month. First up, we have some new information about credit card skimming with hackers using a hybrid method to steal payment information from eCommerce websites. Our analyst Dennis Sinegubko wrote about this for the Sucuri blog back at the beginning of June. Now, most credit card stealing malware is a client side JavaScript that grabs data and sends it to a third party server. But, that approach has a drawback for bad actors because it's still possible to track the requests and catch them as being suspicious. Now, to get around that, bad actors have started harvesting information server side by modifying core PHP files. In this case, the infection would be undetectable from the outside, but it's still going to be pretty easy to find because you're rarely modifying any of those core files, so any of those changes that are going to come up are going to be suspicious. To get around both of these drawbacks, we're seeing bad actors combine the two. So client side snippets of JavaScript are sending stolen credit card data to server side scripts that they've installed on the same server as the site. Now, this allows bad actors to cover their tracks a little bit because the traffic that's being redirected is going to the same server, and that's less likely to be flagged as suspicious. It's a bit more complicated to pull this off, but our team has been seeing this hybrid approach in the wild, so it's something to be on the lookout for. Now, another month has passed, and we found more cross site scripting attacks targeting WordPress plugins. Most notably, we discovered one that affects users of the YITH WooCommerce Ajax Product Filter plugin. Now, this is a plugin that allows WooCommerce stores to be filtered by product type, and it's pretty popular. It's got about 100,000 users right now, so with it being vulnerable, it's very important that all of them update to the latest version, which is 3.11.1. Some of the other plugins we found cross site scripting vulnerabilities with included Elementor Page Builder, Careerfy, JobSearch, and Newspaper. If you're looking for a full list of vulnerabilities that have been patched this month, John Castro at the Sucuri Labs blog has you covered. Check out our show notes for the link. Also, this month I had a blog go up detailing what's called a jibberish hack. It's basically the same motivation as an SEO spam attack where bad actors use your site's good standing to redirect visitors to their own sites. But in this attack, you'll find a bunch of randomly named folders filled with a ton of HTML files with really nonsensical file names like cheap-cool-hairstyles-photos.html. It's just going to be a mishmash of keywords that clearly you didn't put there. Unfortunately, just deleting all those HTML files and folders is not going to be enough to get rid of that jibberish hack though. You're going to need to fully clean any hacked files and database tables, and then you're going to have to deal with all the damage caused to your site's standing. And just keep in mind, if you find anything about that process too daunting, we're always here to help. Now, for this month's Sit Down, we have Sucuri analyst Krasimir Konov. Earlier in June, he had written a lab's note about a malicious downloader script that used the curl function, and we chatted a bit about it, but more importantly, we went really in-depth on all the different varieties of malware that website owners need to be aware of. But, before I get started with Krasimir, I just wanted to remind you about the Sucuri Sync-Up, our sister podcast. It's a weekly website security news briefing that you can find anywhere you get your podcasts, as well as the video version on our social media feed, and now you can even get it on your Amazon Alexa smart speakers. Just search Amazon skills for Sucuri Sync-Up, add the flash briefing, and get new content delivered every Monday. Now, on with the show. Hi Krasimir, thanks for joining us on the show. I thought we could start off and maybe have you tell us a little bit about yourself and what you do here at Sucuri? Krasimir Konov: Yeah, sure. Well, I joined Sucuri originally in 2014, but I've been in the IT business for about 10 years. Nine of those I did security. And currently at Sucuri I'm one of the malware analysts. I used to work in the front lines, used to clean websites and whatnot, and then I gradually moved up, and now I'm working in the malware research department. And my day to day job is basically analyzing malware, and then once I analyze it and figure out what it is, then I will create a signature for it. And we'll add those signatures to our tools, so we can automate some of the work we do. And I also write some Labs Notes blog posts. Usually, if I find something interesting in malware or some security topic, I'll write about it. Justin Channell: Yeah. And of those topics recently that you wrote about, one was about a malicious curl downloader, and how exactly did that work? Krasimir Konov: Right, yeah. That was an interesting one, but not very unique or anything like that. We see that a lot with curl being used as a downloader. It's a very common malware. So rather than including the actual malware in the file, the attackers would use curl to download the malicious code. In this case, they'll download it from Pastebin, but it could be anything. It could be another website or anything like that, and curl would just make a call to the website, request the code. The website will respond with the code, and then later on, there is some code to either save the output somewhere on the website, or you'll just run it through eval and execute the actual code right away. Justin Channell: Right. And you said that it's commonly found in malware, but let's kind of maybe talk a bit broader about malware in general. What is everything that is classified as malware? Krasimir Konov: Well, in general it will be anything that the owner of the website didn't authorize, anything that was added by a third party. There is a lot of different malware. It could be even something like a defacement that will also be considered malware because it was something the user did not authorize. Even though it might not be doing anything malicious on the website, it's not infecting users, the visit is still something they did not authorize. So defacement would also be considered malware. And even something like ransomware where the website is technically not really damaged, it's all encrypted, but it's not infecting anybody. It's not doing anything malicious, but it's still encrypting the entire website and asking the user or the customer, the owner of the website for a ransom they need to pay in order to get the website back online. Justin Channell: Okay. Let's maybe break it down to each individual type of malware. For example, what would be a way that maybe I-frames could be maliciously used by a hacker? Krasimir Konov: Yeah. An I-frame can be used maliciously when it loads content from another location. You can look at the I-frame as a window that just opens another website. So anything that website has on it, you're pretty much loading it through the I-frame. So if that website is infected and it's serving some kind of malware, by opening an I-frame, you're loading all those elements, everything that was on this website. And sometimes the I-frame can be as small as pixel or something hidden somewhere off the screen, so you wouldn't even know that it was opening it. Justin Channell: And yeah, I feel like we've also seen a lot of them where they're used almost to mimic popups as well. Krasimir Konov: Yeah. I mean the I-frame, it could just load from another website and the other website could do anything. It could be serving just malware and it would try to infect the user that doesn't even know that they're being connected to the other website. It could just have some other JavaScript that's just trying to open up pop ups on the original website through the I-frame. Yeah, it could be a lot of things. Justin Channell: Okay. And also, let's talk a little bit about conditional redirects and how those work. What allows a script to detect which devices are coming in and where they're coming from? Krasimir Konov: Right. Yeah. That's a common one we see a lot. Basically, a conditional redirect would be something, it's a redirect on the website. It's obviously malicious, but there's certain conditions that need to be met before the redirect is actually executed or the redirect happens. For example, let's say if it's on a phishing website or a phishing page that is hidden somewhere on the website. For example, if Google visits it, obviously the attacker doesn't want Google to see the actual phishing page and record it as a phishing page. So they'll look for, for example, the IP address. They would look for the user agent. And a lot of times they can tell that it's a bot. So they'll just return a 404 response, for example, that will be like, "Oh, page not found." So Google would be like, "Oh, it looks like this page doesn't exist." But then if a regular user goes to the same page, then those conditions will be met. The actual website or the script behind the phishing will check and see, and be like, "Oh, this one is running Firefox or Chrome," and be like, okay. And then they'll look at the IP and be like, "Oh, he's in whatever, he's in United States somewhere." And he's like, "Oh, okay. That's good." And then once all of these conditions are met, then the actual script will serve them the actual phishing page. And it'll be like, "Oh, you need to fill out this to recover your account or whatever, or type in your credentials to log in here." Justin Channell: And so this is the type of thing we're really, a website owner is going to run into this more commonly when people are complaining about they're getting served bad content or whatever, and they can't seem to replicate it. It's likely probably these kind of redirects. Is that right? Krasimir Konov: Right, right. It could be something as specific as, for example, a range of IP addresses that correspond to an ISP or maybe let's say a country. It could be like, "Oh, were targeting only customers in the US," so if you're connecting from another country and you go to the same website or the same page, it would just say 404. It will give you a page not found. But then if you actually have an IP address from the United States, you're connecting from the United States, then it will actually show you the phishing page. Justin Channell: Now another type of malware I feel like we see a lot here is SEO spam. We hear people talking about that. What are some of the top SEO spam keywords that you see coming through? Krasimir Konov: Yeah. We get that a lot. We see a lot of spam on websites. A lot of times attackers will use SEO spam to gain ranking for their own website. Or they'll just try to include some kind of SEO spam in links to another website that they're currently running or something. I mean, these things change all the time. So a website might be up for a week and then it'll disappear, and then they'll start another campaign. But yeah, we see that a lot. We see all kinds of keywords they use. Most common ones will be something like Viagra. We'll have like jerseys for sale. A lot of times, they'll use name brands like Nike, Rolex, Prada. We've seen even some essay writing services for some reason. I'm not sure why, but that's common. We see, for example, pharmaceuticals a lot that will use specific medicine names. They'll use all kinds of replicas, like a replica bag of this, replica this, replica that. We'd see prescription, also payday loans. And obviously there's some adult related sites and things like that keywords. Justin Channell: So pretty much anything that people are going to be searching and clicking on are probably going to be targets for SEO spam? Krasimir Konov: Right. I think a lot of it commonly is pharma related because a lot of people are looking to buy medicine online, and a lot of times will require a prescription. So a lot of people are like, "Oh, let me see if I can find this medicine that I can buy it online somewhere." They don't need a prescription. They don't want to pay to visit a doctor and whatnot, and they'll look for it. And yeah. Justin Channell: Now, whenever somebody's website does get hacked with a SEO spam attack, what kind of effect can it have on the website beyond just being defaced? Krasimir Konov: Yeah. You can have a lot of things can happen, negative things. For example, the website can be blacklisted because of the keywords. And that usually represents a big red warning when you go on the website, depending on who blacklisted it. But if it's Google, for example, you'll see a big warning and it'll tell you this website contains malware or there's something wrong with this website. So, pretty much all the traffic on the website will be gone. And then you can also lose a lot of your reputation if there is a SEO spam on the website. For example, if you were ranked in say number five for certain keywords that represent your product on Google search engines, and then suddenly you get hit with SEO spam, then all these search engines then go and visit the website. And all of a sudden they're like, "Oh, there's all these weird key words on here, all this SEO spam that's causing a lot of mixed signals." And the search engines are like, "Oh, where do we rank this website now? Do we rank them with this product that's originally what the website is about? Or do we take into consideration all these other keywords that are mixed up that are SEO spam?" So, all of a sudden your website might go from being ranked number five on the first page to being on the 10th page. And then you rank for all these other keywords that you didn't intend to. And then people search for something completely different. They're searching for jerseys or something, or now they're searching for Prada products, and then suddenly your website pops up in there. So you're not really getting any good traffic, not targeted traffic. But, yeah. Justin Channell: Okay. So in a lot of ways, the effects of SEO spam would kind of be the same for defacements or any kind of malware with the blacklisting, but it does bring that kind of unique part to it where then it can also then bring traffic that you weren't expecting from somebody searching for jerseys, for example. I had not really ever thought about that. Krasimir Konov: Right, right. Yeah. It will definitely bring some traffic. I've seen a lot of times where websites will be connected. Let's say, there was 1,000 websites that were all infected with SEO spam, and it will kind of link each other to try to bring each other up into the rankings. And so you would see a lot of strange traffic from some random websites that were, for example, that were previously infected, even if they might not be anymore. But yeah, they'll be sending traffic to you or there'll be usually search engines sending you traffic, but for the wrong keywords. People are looking for something else, so obviously they're not going to be interested in your website. They're not going to buy anything because they're not looking for that. Justin Channell: And now, so thinking of the way websites get infected, a very common way it seems to be is through phishing campaigns. What are some recommendations you have for the best ways to avoid becoming a phishing victim? Krasimir Konov: Yeah. There is some ways. I mean, it depends really on the type of attack. Obviously, a lot of people, when they think of phishing, they think, "Oh, it's just like a PayPal phishing page and it just looks like the original," but it could be more subtle. If it's just a regular page where you're just going and you get redirected to another website, obviously the first thing to look is if you have the security padlocks, make sure that traffic is encrypted. A lot of these websites don't really have any encryption nowadays. More are starting to get that with pre SSLs being issued and whatnot. But that's the first thing to look and see, make sure. Anywhere you're typing your sensitive information, you want to make sure you have the padlock to make sure everything is encrypted. Krasimir Konov: But also you want to look at the URL of the actual website you're visiting. A lot of times they'll try to hide it. So you might have to be careful and look closely. Something that might be an I will be an L or something like that. And a capital I and L might look kind of similar into your IRL, so you might miss something like that. Say, if you're looking for PayPal and it might replace the L with an I, and if you don't look closely, it might look exactly the same. And you're like, "Oh, okay, it's paypal.com," but not really. So yeah. Just pay attention to the URL, make sure it is the actual website. There's no paypal.com dot something, dot something else, dot com. Yeah. You want it to just say paypal.com, and then it'll have forward slash and something else. But yeah, it gets more complicated when you have, for example, a phishing page that's injected into a regular page. For example, you have a checkout page on a website that you're buying things from and you go through the checkout page and you're looking at where you type in your credit card information and whatnot. And you might have a phishing page that actually looks exactly like a little box that gives you where you put in your credit card number, or your name, your address, and all that. So that will be more subtle. For example, that could be also an I-frame that's just coming from another page. And it will look exactly like it's part of the website. You're on the legitimate website, but only that portion of the website is actually the phishing page. And you look at it and you're like, "Oh, okay. It looks fine. I'm just putting my credentials." So that one could be a lot harder to figure it out. Usually, if it's something like that, I look for something that looks kind of out of place. Maybe they didn't get the right font. It might not be the same as the original website or there might be something out of place, some fields that are missing or some fields that are squished into the left or the right. It looks kind of awkward. It's like, why would this be like this? The whole website looks professional. There's a pink background or something, for example, and then suddenly there's this white box in the middle. It's like, ah, it looks kind of weird, out of place. Justin Channell: So pretty much if anything looks slightly out of place, you really should double check everything at that point. Krasimir Konov: Right. Right. Yeah. Obviously there's more ways that you can check, but I wouldn't get into more technical, like inspecting elements and looking at stuff, but yeah. Justin Channell: And now another type of malware that's kind of, and it kind of plays in with whatever the other infection is, is backdoors. Can you give us some examples of what backdoors can be? It's mainly just when a hacker can get back into the site to reinfect it, but I know there are a ton of different methods. And what are some of the more common ones and then maybe some that really interesting that you've seen? Krasimir Konov: Yeah, there is a lot. They'll probably be one of the first things the hacker would do is if they compromise a website, obviously they'll try to spread backdoors and just inject code everywhere so they can get back in, even if the owner of the website or webmaster cleans it. They want to try and hide some malicious code somewhere so they can always get back in. There's many variations. A backdoor could be something as simple as a single line of code to just [inaudible 00:20:19] argument, some kind of string or something via get or post. Krasimir Konov: And then it runs into an eval, so it evaluates the code and executes it. And some backdoors are very complex and they can be included in, let's say you have a WordPress site and you have a specific login page where all the login credentials are being processed and everything else. They could even inject code into that to basically bypass the whole login mechanism so that they can just bypass everything. They don't even have to know any user. They don't have to know the password, nothing. They'll just include some lines in there, and every time they'll be just able to log in. Yeah. It gets pretty crazy. Yeah. I mean, there's all kinds of malware. There is always a malware, for example, that just targets credit cards and will just target the eCommerce websites. And they'll just try to steal the login credentials, I mean, the credit cards. They'll try to get your address, your credit card information, any kind of CVV code or whatever you typed into the billing address, everything. And then there's also malware like the backdoors that are just trying to keep the attacker in control and trying to get them back into the website. There's just so many variations of what a malicious user might want to do on a website. Some can be something as simple as just reinfecting the website. They don't want to keep control. They just want to keep reinfecting it with some kind of malware. So even if you clean it, it would just get reinfected. Some of them in the database, otherwise might be in the files. We've seen some added into a [inaudible 00:22:14] job that just keeps running on the server. There could be malware that is just a giant to, for example, attack out of websites. Like for example, a distributed denial service where they put the same malware on thousands of websites. And then they try to send traffic to one website to try to bring it down. Yeah. People try to do all kinds of stuff with websites. We've seen even some cryptocurrency mining malware that you go onto a website and suddenly your PC starts running like crazy. And you're like, what the hell is going on? Your fans turn on and the PC is 100% CPU. And it turns out that the website has some malware that's just by mining Bitcoins with your CPU and it's using all of it. Justin Channell: Wow. Okay. So one question now, the last question I have is of all the malware that you've seen, what do you think is the coolest piece of malware that you've ever seen? Krasimir Konov: I think the coolest would be the ones that are so subtle that you don't even know that it's there. For example, we've seen some that were pretty innovative. It will be just a one liner code that's just one line. And for example, it will be let's say 40-50 characters, something like that. And that's all it is. And they'll hide it somewhere in between the legitimate code. And if you don't know what you're looking for, you would never see it. It doesn't look suspicious. There is no links to some other website. There's no some kind of encrypted code or anything like that. It's just a simple one line. And then if you're just scrolling through the file looking for something, you would never see it. It just looks like all the other code. And then if you look closely, you're like, "Oh, there's this..." Look closely, and you're like, "Oh wow, this is not supposed to be there." And then you keep looking at it and you're like, "This looks really weird." And then you see that it's actually doing some malicious things and trying to evaluate some code or taking output from the outside, I mean, some input from outside, you can call it and give it code to run. Justin Channell: Well, Krasimir, thanks for coming on and talking to us for today. Krasimir Konov: Yeah. Thank you. Thank you. I'm so happy. I'm glad I was able to do this podcast and I can't wait to do another one. Justin Channell: Yeah, we'll have you on again. Thanks. Krasimir Konov: Thank you. Justin Channell: Thanks again to Krasimir for joining us here on the Sit Down. We'll be back with another episode next month. So be sure to subscribe on Apple podcasts, Spotify, Stitcher, or any podcasting platform. Also, be sure to follow us on social media at Sucuri Security and check us out at sucuri.net. That's S-U-C-U-R-I.net. I'm Justin Channell, And this has been the Sucuri Sit Down. Stay safe out there.](https://blog.sucuri.net/wp-content/uploads/2020/05/20-sucuri-podcast-blog-post_blog_image-390x183.jpg)



6 comments
Well… the big problem with file integrity plugins is that if an attacker -or malware- access to your site, he can put some code to modify the DB erasing security alerts (or disabling notifications). Or he can just edit 1 line of the security plugin to bypass the scan, as in Sucuri plugin happens.
IMHO checking file integrity using plugins is an error; the checking process should be done from server tools.
Thank you for dedicating your time (in hours) writing this reasonable summary.
Very comprehensive overview. I really think end-users need to fully understand that securing their website should not be taken lightly. Unfortunately, security is often considered as an option and mandatory. On top of it, 7,230,000 results for security search, is simply misleading them. How many think they’re covered when they are not?
This is a great article. It is an important reminder that security is like any other system, and the old quality management system axiom — Plan-Do-Check-Act is relevant it maintaining a secure site. I’ve forward this article to all my client’s who are in the ‘Set-It — Forget It’ mindset. Thanks for all your hard work and sharing your insights.
Today I learned that you can apparently change your own oil?
All kidding aside, great article – thanks again, Tony!
Hi Tony, thank you for sharing this informative piece of work. Security for WordPress is something that not many care about, but it is very effective to protect against the vulnerability. You have comprehensively talked about a subject which is quite essential to be highlighted.
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