Vidar v2.0 VM-based bytecode interpreter obfuscation skeleton

Ibrahim Saud@tektrix

•updated Sep 22, 2026•0•0•3

Detects the accumulator-based virtual machine (VM) skeleton used by Vidar Stealer (v2.0+) to obfuscate its internal configuration and strings. The rule specifically identifies a combination of bit-manipulation and arithmetic primitives (ROR, ROL, NOT, IMUL, ADD, SUB, XOR) acting as a dispatcher pattern within highly entropic executable sections, which is a characteristic behavioral artifact of the Vidar Stealer obfuscation engine.