An In-Depth Analysis of Novel KarstoRAT Malware

KarstoRAT is a newly identified remote access trojan that emerged in early 2026, combining surveillance, credential theft, and remote command execution capabilities. The malware supports extensive post-compromise operations including system reconnaissance, screenshot and audio capture, webcam monitoring, keylogging, and token theft. It communicates with a C2 server at 212.227.65[.]132 using HTTP protocols with the user agent 'SecurityNotifier'. Distribution occurs through gaming-themed lure pages targeting Roblox players and FPS/GTA modders via fake cheat loaders. KarstoRAT employs multiple persistence mechanisms through registry keys, scheduled tasks, and startup folders, while featuring a UAC bypass using the fodhelper.exe technique. The malware has not been publicly advertised on cybercrime forums, suggesting private development and limited operator use rather than commodity distribution.

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