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@training.invokere.com
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Researchers have uncovered a new and sophisticated variant of the Interlock RAT, a remote access trojan associated with the Interlock ransomware group. This latest iteration is written in PHP, marking a departure from previously observed JavaScript-based versions. The malware is being distributed through a widespread campaign that leverages compromised websites and Cloudflare tunnels. The attack chain begins with a single-line script injected into website HTML, often unbeknownst to the website owners. This script employs IP filtering to serve the payload, which then manipulates the user into clicking a captcha for "verification," ultimately leading to the execution of a PowerShell script that deploys the Interlock RAT.
The delivery mechanism for this new PHP variant utilizes the KongTuke FileFix technique. Researchers have noted that this updated method has been observed deploying the PHP version of the Interlock RAT, and in some instances, this has subsequently led to the deployment of the Node.js variant of the same RAT. The capabilities of this Interlock RAT variant include remote control of compromised systems, thorough system reconnaissance, and the ability to perform lateral movement within a network. This demonstrates an evolving level of sophistication in the threat actor's tactics. The DFIR Report, in collaboration with Proofpoint, identified the malware and its distribution methods. The observed execution involves a PowerShell command that deletes a scheduled task named "Updater" before downloading and executing a script from a specific URL. This script, in turn, abuses the `php.exe` executable from an uncommon location to further download and execute the RAT. Security professionals are advised to be aware of PowerShell spawning `php.exe` from unusual directories as a potential indicator of compromise. Additionally, the RAT's reconnaissance activities, such as running `systeminfo`, `tasklist`, `whoami`, or `nltest`, provide further opportunities for detection.
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@blog.talosintelligence.com
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North Korean-aligned threat actor Famous Chollima, also known as Wagemole, is actively targeting cryptocurrency and blockchain professionals, primarily in India, using a newly discovered Python-based Remote Access Trojan (RAT) named PylangGhost. This RAT, identified by Cisco Talos in May 2025, serves as a Python-equivalent to their existing GolangGhost RAT, which was previously deployed against MacOS users. The threat actor seeks financial gain by creating fake employers for the purpose of jobseekers exposing their personal information, and second by deploying fake employees as workers in targeted victim companies.
This campaign involves a sophisticated operation where attackers impersonate recruiters from well-known tech firms like Coinbase, Robinhood, Uniswap, and Archblock. Victims are lured through fake job advertisements and skill-testing pages, directed to submit personal and professional information, grant camera access, and copy/execute a malicious shell command under the guise of installing video drivers. Instructions for downloading the alleged fix are different based on the browser fingerprinting, and also given in appropriate shell language for the OS, including PowerShell for Windows and Bash for MacOS. PylangGhost is a multi-stage Python malware framework disguised in a ZIP archive downloaded via the shell command. Upon execution, a Visual Basic Script extracts and launches the malware. The framework consists of modular components that enable credential and cookie theft from over 80 browser extensions, file operations (upload, download), remote shell access, and system reconnaissance. The attackers are primarily targeting individuals with experience in cryptocurrency and blockchain technologies, utilizing skill-testing sites that impersonate legitimate companies to further their deception.
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