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Rook is a ransomware operation active by late 2021. It operated a public leak site and claimed responsibility for an attack against a major automotive technology and components supplier in December 2021. Its leak site ceased operating around the end of January 2022. Rook has been assessed as operationally similar to the later Pandora ransomware operation, including overlap in a victim subsequently listed by Pandora, but a rebranding relationship is not confirmed.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Attributed origin per open-source reporting.
3 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Bluesky post links to S2W's ransomware-landscape article and includes the hashtag #Rook.
Named as one of multiple ransomware groups operating data leak sites and listing fresh victims.
Referenced as a named activity cluster or threat actor discussed in the ESET APT Activity Report Q4 2025–Q1 2026.
Named ransomware group discussed as a possible prior brand or closely related operation to Pandora.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.