[matchboil]

October 9, 2026

• ESET traced MATCHBOIL back further than CERT-UA's first write-up. The C# downloader used by Russia-aligned UAC-0099 against Ukrainian targets has versions from April 2024 through April 2026, each iteration more sophisticated in how it fetches, installs and persists its payload (ESET, Dark Reading) (earlier coverage). · Threat Activity

in Third NetScaler RCE in a Month Lands on the Same SAML Surface

August 28, 2026

• UAC-0099 is deliberately tripping LLM safety filters to block malware analysis. ESET documented GuardBreaker, used against a Ukrainian victim: the operators pad a malicious VBS downloader with a comment asking for help building a nuclear weapon, so an AI-assisted analysis pipeline refuses and never reaches the actual MATCHBOIL installer logic (ESET Research). Anyone running LLM triage in a malware workflow should assume this is now standard tradecraft. · AI & Model Security

in Australia Charges Two Over the TeamPCP Supply-Chain Spree