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Medusa Ransomware Uses Malicious Driver to Disable Anti-Malware with Stolen Certificates

Medusa Ransomware Uses Malicious Driver to Disable Anti-Malware with Stolen Certificates

Mar 21, 2025 Ransomware / BYOVD
The threat actors behind the Medusa ransomware-as-a-service (RaaS) operation have been observed using a malicious driver dubbed ABYSSWORKER as part of a bring your own vulnerable driver ( BYOVD ) attack designed to disable anti-malware tools. Elastic Security Labs said it observed a Medusa ransomware attack that delivered the encryptor by means of a loader packed using a packer-as-a-service (PaaS) called HeartCrypt. "This loader was deployed alongside a revoked certificate-signed driver from a Chinese vendor we named ABYSSWORKER, which it installs on the victim machine and then uses to target and silence different EDR vendors," the company said in a report. The driver in question, "smuol.sys," mimics a legitimate CrowdStrike Falcon driver ("CSAgent.sys"). Dozens of ABYSSWORKER artifacts have been detected on the VirusTotal platform dating from August 8, 2024, to February 25, 2025. All the identified samples are signed using likely stolen, revoked ce...
Behind the Scenes: The Art of Safeguarding Non-Human Identities

Behind the Scenes: The Art of Safeguarding Non-Human Identities

Mar 28, 2024 Secrets Management / Zero Trust
In the whirlwind of modern software development, teams race against time, constantly pushing the boundaries of innovation and efficiency. This relentless pace is fueled by an evolving tech landscape, where SaaS domination, the proliferation of microservices, and the ubiquity of CI/CD pipelines are not just trends but the new norm. Amidst this backdrop, a critical aspect subtly weaves into the narrative — the handling of non-human identities. The need to manage API keys, passwords, and other sensitive data becomes more than a checklist item yet is often overshadowed by the sprint toward quicker releases and cutting-edge features. The challenge is clear: How do software teams maintain the sanctity of secrets without slowing down their stride? Challenges in the development stage of non-human identities The pressure to deliver rapidly in organizations today can lead developers to take shortcuts, compromising security. Secrets are the credentials used for non-human identities. Some stan...
Researcher finds a way to Delete and Modify Facebook Messages Sent to Other Users

Researcher finds a way to Delete and Modify Facebook Messages Sent to Other Users

Jun 07, 2016
Sometimes I receive emails from our readers who wanted to know how to hack Facebook account , but just to delete some of their messages they have sent to their friends or colleagues mistakenly or under wrong circumstances like aggression. How to hack a Facebook account? It is probably the biggest "n00b" question you will see on the Internet. The solution for this query is hard to find — but recently researchers have shown that how you can modify or alter your messages once you have pressed the SEND button in Facebook Messenger. According to the researcher  Roman Zaikin  from cyber security firm Check Point , a simple HTML tweak can be used to exploit Facebook online chat as well as its Messenger app, potentially allowing anyone to modify or delete any of his/her sent message, photo, file, and link. Though the bug is simple, it could be exploited by malicious users to send a legitimate link in a Facebook chat or group chat, and later change it to a malicious link t...
cyber security

New Webinar: Analyzing Real-world ClickFix Attacks

websitePush SecurityBrowser Security / Threat Detection
Learn how ClickFix-style attacks are bypassing detection controls, and what security teams can do about it.
cyber security

Weaponized GenAI + Extortion-First Strategies Fueling a New Age of Ransomware

websiteZscalerRansomware / Endpoint Security
Trends and insights based on expert analysis of public leak sites, ransomware samples and attack data.
How to Detect Phishing Attacks Faster: Tycoon2FA Example

How to Detect Phishing Attacks Faster: Tycoon2FA Example

May 21, 2025 Malware Analysis / Threat Intelligence
It takes just one email to compromise an entire system. A single well-crafted message can bypass filters, trick employees, and give attackers the access they need. Left undetected, these threats can lead to credential theft, unauthorized access, and even full-scale breaches. As phishing techniques become more evasive, they can no longer be reliably caught by automated solutions alone. Let's take a closer look at how SOC teams can ensure fast, accurate detection of even the most evasive phishing attacks, using the example of Tycoon2FA, the number one phishing threat in the corporate environment today. Step 1: Upload a suspicious file or URL to the sandbox Let's consider a typical situation: a suspicious email gets flagged by your detection system, but it's unclear whether it's indeed malicious. The fastest way to check it is to run a quick analysis inside a malware sandbox. A sandbox is an isolated virtual machine where you can safely open files, click links, and observe behavior ...
Billions of Android Devices Vulnerable to Privilege Escalation Except Android 5.0 Lollipop

Billions of Android Devices Vulnerable to Privilege Escalation Except Android 5.0 Lollipop

Nov 20, 2014
A security weakness in Android mobile operating system versions below 5.0 that puts potentially every Android device at risk for privilege escalation attacks, has been patched in  Android 5.0 Lollipop  – the latest version of the mobile operating system. The security vulnerability ( CVE-2014-7911 ), discovered by a security researcher named Jann Horn , could allow any potential attacker to bypass the Address Space Layout Randomization (ASLR) defense and execute arbitrary code of their choice on a target device under certain circumstances. ASLR is a technique involved in protection from buffer overflow attacks. The flaw resides in java.io.ObjectInputStream , which fails to check whether an Object that is being deserialized is actually a serializable object. The vulnerability was reported by the researcher to Google security team earlier this year. According to the security researcher, android apps can communicate with system_service, which runs under admin p...
Researchers Warn of Unpatched "DogWalk" Microsoft Windows Vulnerability

Researchers Warn of Unpatched "DogWalk" Microsoft Windows Vulnerability

Jun 08, 2022
An unofficial security patch has been made available for a new Windows zero-day vulnerability in the Microsoft Support Diagnostic Tool (MSDT), even as the Follina flaw continues to be exploited in the wild. The issue — referenced as  DogWalk  — relates to a path traversal flaw that can be exploited to stash a malicious executable file to the Windows Startup folder when a potential target opens a specially crafted ".diagcab" archive file that contains a diagnostics configuration file. The idea is that the payload would get executed the next time the victim logs in to the system after a restart. The vulnerability affects all Windows versions, starting from Windows 7 and Server Server 2008 to the latest releases. DogWalk was originally  disclosed  by security researcher Imre Rad in January 2020 after Microsoft, having acknowledged the problem, deemed it as not a security issue. "There are a number of file types that can execute code in such a way but aren't techni...
Warning: Malware Campaign targeting Jailbroken Apple iOS Devices

Warning: Malware Campaign targeting Jailbroken Apple iOS Devices

Apr 19, 2014
A new piece of malicious malware infection targeting jailbroken Apple iOS devices in an attempt to steal users' credentials, has been discovered by Reddit users. The Reddit Jailbreak community discovered the malicious infection dubbed as ' Unflod Baby Panda ', on some jailbroken Apple iOS devices on Thursday while a user noticed an unusual activity that the file was causing apps such as Snapchat and Google Hangouts to crash constantly on his jailbroken iPhone. CHINA WANTS YOUR APPLE ID & PASSWORDS Soon after the jailbroken developer uncovered the mysteries ' Unfold.dylib ' file and found that the infection targets jailbroken iOS handsets to captures Apple IDs and passwords from Internet sessions that use Secure Socket Layer (SSL) to encrypt communications and is believed to be spreading through the Chinese iOS software sites, according to the researchers at German security firm SektionEins . The researchers found that the captured login information is been sent ...
#SOPA - The Hacker News say “NO WAY”

#SOPA - The Hacker News say "NO WAY"

Jan 19, 2012
#SOPA - The Hacker News say " NO WAY " Get mad and take action as you read how your internet privacy and freedoms are about to be taken away in our editor Patti Galle 's article on SOPA…….coming to your personal rights soon. The Stop Online Piracy Act (SOPA), or H.R. 3261, is a bill that was introduced on October 26, 2011 in the United States House of Representatives, by right-wing Texas Republican, Representative Lamar Smith and twelve initial co-sponsors. The Stop Online Piracy Act dramatically broadens the capacity of United States law enforcement and copyright holders to fight online trafficking in copyrighted intellectual property and counterfeit goods. Proponents of bill H.R. 3261 state SOPA protects the intellectual property market and related industry, jobs and revenue, and is essential to reinforce and strengthen enforcement of copyright laws particularly against foreign websites. Opponents of the bill forcefully deem that the bill infringes on First Amendment rights, is e...
Fake Flappy Bird App Planted by Hackers to Steal Photos from Device

Fake Flappy Bird App Planted by Hackers to Steal Photos from Device

Sep 07, 2014
As far, you have probably heard about the biggest digital exposure of private and very personal nude photographs of as many as 100 female celebrities including Jenny McCarthy, Kristin Dunst, Mary E Winstead, and Oscar winner Lawrence and Kate Upton, that was surfaced on notorious bulletin-board 4chan, and anonymous image board AnonIB over the weekend. It was believed that the group of hackers allegedly taken celebrities photos from their Apple iCloud backups after their iCloud accounts were compromised, but users of devices running Google's Android could have been targeted too. A forum post on anonymous image board AnonIP shows that the group of hackers may have used a cloned Flappy Bird app to steal and collect the naked photos of females from their Android devices and then send them to remote servers. Experts believe that the group may have been stealing and trading nude and very personal photos of more than 100 female celebrities for more than two years, gather...
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