A Closer Look at the Novel and Stealthy KarstoRAT Malware

KarstoRAT is a newly observed remote access trojan (early 2026) that performs system reconnaissance, keylogging, token theft, screenshot/audio/webcam exfiltration, remote code execution, and persistence; operators lure victims via a fake Roblox (Blox Fruits) marketplace and use an HTTP C2 with the user agent "SecurityNotifier" for commands and data exfiltration, and the malware includes disruptive features (text-to-speech, desktop inversion, mouse swap) and a remote self-destruct capability.