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PULSE DETAIL
In April and May 2026, investigations revealed two incidents involving The Gentlemen ransomware-as-a-service operation, which has claimed over 400 victims across 70 countries since mid-2025. Both incidents demonstrated common tactics including Scheduled Tasks, PowerShell commands, and defense evasion techniques such as clearing Security, System, and Application Event Logs, disabling Microsoft Defender, and adding antivirus exclusions. A leaked internal database in early May exposed the operation's infrastructure, affiliate structure, and targeting of vulnerabilities like CVE-2024-55591. The attacks showed threat actors using RDP connections, disguised executables, SOCKS proxy connections for persistence, and domain-wide deployment via NETLOGON shares. Despite attempts to evade detection, sufficient forensic telemetry remained for analysis, revealing workstation names previously associated with Qilin ransomware and Lazarus infrastructure.
MITRE ATT&CK & Malware Families
Indicators of Compromise (1 / 4 total)
| TYPE | INDICATOR | DESCRIPTION | CREATED | |
|---|---|---|---|---|
| FileHash-SHA256 | f918535f974591ef031bd0f30a8171e3da27a6754e6426a8ba095f83195661c8 | — | 2026-05-21 |