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Category Archive: Research

Botnet of Infected WordPress Sites Attacking WordPress Sites

This entry was posted in Research, Wordfence, WordPress Security on December 05, 2018 by Mikey Veenstra   17 Replies

The Defiant Threat Intelligence team recently began tracking the behavior of an organized brute force attack campaign against WordPress sites. This campaign has created a botnet of infected WordPress websites to perform its attacks, which attempt XML-RPC authentication to other WordPress sites in order to access privileged accounts. Between Wordfence’s brute force protection and the premium real-time …
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XSS Injection Campaign Exploits WordPress AMP Plugin

This entry was posted in Research, Vulnerabilities, WordPress Security on November 20, 2018 by Mikey Veenstra   19 Replies

News broke last week disclosing a number of vulnerabilities in the AMP For WP plugin, installed on over 100,000 WordPress sites. WordPress contributor Sybre Waaijer identified the security issue and confidentially disclosed it to the WordPress plugins team. To exploit the flaw, an attacker needs to have a minimum of subscriber-level access on a vulnerable site. The …
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Trends Emerging Following Vulnerability In WP GDPR Compliance Plugin

This entry was posted in Research, Vulnerabilities, WordPress Security on November 09, 2018 by Mikey Veenstra   19 Replies

Earlier this week the WP GDPR Compliance plugin was briefly removed from the WordPress.org repository after the discovery of critical security issues impacting its users. In yesterday’s post, we provided some details regarding these issues and illustrated their severity. In the hours since that post was published, our team has continued tracking the adversaries seeking …
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Top Tools for Security Analysts in 2018

This entry was posted in General Security, Research, WordPress Security on June 26, 2018 by Mikey Veenstra   4 Replies

Last spring, after discussing the tools and tech used by our team, we published a list of 51 Tools for Security Analysts. The article was well-received, and the comments offered some great suggestions to top it all off. In the spirit of that list we’d like to offer our updated 2018 edition, featuring the Defiant …
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BabaYaga: The WordPress Malware That Eats Other Malware

This entry was posted in Research, WordPress Security on June 06, 2018 by Mikey Veenstra   15 Replies

Recently, Defiant’s analysts have been tracking a particularly sophisticated malware infection responsible for generating spam links and redirection, while still remaining relatively difficult for victims to detect. Dubbed “BabaYaga” by our team, this infection is notable for containing code capable of removing its competition. BabaYaga actually has the ability to remove other malware. While this …
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Hijacked WordPress.com Accounts Being Used To Infect Sites

This entry was posted in Research, WordPress Security on May 22, 2018 by Brad Haas   25 Replies

Update on May 23 at 11:50AM: A representative from WordPress.com reached out to us with the following statement: There has been some misinformation making the rounds, so to clarify, there has been no security breach for user accounts at WordPress.com. But if someone else has your WordPress.com account credentials, they could log in and modify …
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WordPress: Tracking Emerging Cryptomining Threats

This entry was posted in Research, Wordfence, WordPress Security on May 08, 2018 by Mark Maunder   16 Replies

This is a post written by James Yokobosky who works on the Defiant Threat Intelligence team. In his daily job he analyzes new WordPress threats as they emerge and adds detection capability to the Wordfence malware scanner. In addition to making sure we detect new malware, James also researches the pieces of malware we find …
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Service Vulnerability: MelbourneIT Fixes NFS Permissions Problem

This entry was posted in Research, Vulnerabilities on March 30, 2018 by Brad Haas   0 Replies

In February, we wrote about a vulnerability on three shared hosting services.  Following our Vulnerability Disclosure Policy, we had alerted them about vulnerable permissions on shared drives on their servers. They fixed the problem, making things safer both for their customers and for their customers’ site visitors. During the past month we noticed the same kind …
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Three Plugins Backdoored in Supply Chain Attack

This entry was posted in Research, WordPress Security on December 27, 2017 by Dan Moen   54 Replies

In the last two weeks, the WordPress.org repository has closed three plugins because they contained content-injection backdoors. “Closing” a plugin means that it is no longer available for download from the repository, and will not show up in WordPress.org search results. Each of them had been purchased in the previous six months as part of …
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Massive Cryptomining Campaign Targeting WordPress Sites

This entry was posted in Research, WordPress Security on December 19, 2017 by Brad Haas   31 Replies

On Monday we wrote about the massive spike in brute force attacks on WordPress sites that we observed. As reported, it was the most intense period of attacks we had ever recorded. We believe that a single botnet is behind the attacks. We were able to isolate the IP addresses from the botnet and then …
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