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Ransomware group profile · #408 by claimed victims

Cs-137 ransomware

Cs-137 is a ransomware operation tracked by VULONE since September 2026.

Defunct First seen Sep 2026
0Victims claimed on leak sites
0Victims in the last 30 days
0Victims in the last 90 days
0Countries hit
0Leak-site URLs tracked
—Latest claim recorded

Tactics, techniques and procedures

ATT&CK technique mapping for Cs-137 is in progress. Victimology, infrastructure status and leak-site tracking are live above.

Indicators, detections and the full playbook

Hashes, C2 addresses, onion services, Sigma and YARA detections per technique, and the negotiation transcripts are available to signed-in analysts.

See full IOCs

Frequently asked

Is Cs-137 ransomware still active?
Cs-137 is tracked as defunct.
How many victims has Cs-137 claimed?
VULONE has recorded 0 leak-site victim claims attributed to Cs-137, across 0 countries and 0 sectors.
Which industries does Cs-137 target?
Sector data for Cs-137 victims is not yet available.
Which countries are most affected by Cs-137?
Country data for Cs-137 victims is not yet available.
Where does VULONE get Cs-137 victim data?
Claims are collected continuously from the group's own leak sites and cross-checked with ransomware.live and RansomLook. A claim is the group's assertion, not a confirmed breach.

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Victim claims are collected from leak sites and enrichment partners (ransomware.live, RansomLook) and represent the group's own assertions, not confirmed breaches. Profile last updated 16 September 2026. Questions or corrections: [email protected].