Ransomware group directory

523 tracked ransomware groups with victim-claim counts, leak-site availability, and activity status.

Deeper analysis of any listed group: the 365-day group dossier, head-to-head group comparison, and the co-claim collision graph.

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Source: reconciled leak-site victim claims aggregated from documented public monitoring providers. Independent providers are distinguished from mirrors, and no provider count verifies an underlying allegation. Definitions for every term used here are in the glossary.

Victim records are provider-reported allegations, not independently verified breaches. Published for research, defense, and educational use.