Abyssos: Technical Analysis of a New Modular RAT

Introduction In late June 2026, Zscaler ThreatLabz identified a new malware family that we track as Abyssos. Abyssos is a new modular remote administration tool (RAT) written in C++ that supports a variety of features including credential theft, file exfiltration, and remote access via VNC. Abyssos is in active development with multiple version numbers and different obfuscation passes th