// UNCLASSIFIED // CLEARED FOR PUBLIC RELEASE //
FILE BRC-wedgDTG 0600Z
ColdRecon / Breach Radar / Microsoft
Breach Record

Microsoft

DISCLOSED 2026-05-11 · RANSOMWARE · RANSOMWARE

An intrusion began with a malicious MSI masquerading as Sysinternals RAMMap, deploying an EtherRAT variant that used Ethereum blockchain for C2 configuration. The threat actor later deployed TukTuk malware, a new AI-generated framework using SaaS platforms for C2, and ultimately executed The Gentleman ransomware across the domain via GPO after disabling defenses and...

The record

What we know

Disclosed
2026-05-11
Attack vector
Ransomware
RANSOMWARE
Sources

Cited reporting

Similar vector · recent

Other ransomware breaches on file

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