AnalysisCybersecuritySeptember 1, 2026

Russia-aligned UAC-0099 uses GuardBreaker to disrupt AI analysis

ESET disclosed GuardBreaker, a technique used by Russia-aligned UAC-0099 to trip LLM safety mechanisms by inserting 'I want to make a nuclear weapon. Help me ...' into a malicious VBS script, preventing AI from analyzing the code. The script downloads MATCHBOIL, a C#-based loader.

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