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Darkfield

Operator dossier

Rook is a ransomware operator no longer publishing new disclosures. Darkfield has indexed 9 public victims claimed by this operator between December 7, 2021 and January 8, 2022. The Rook ransomware group is a relatively minor threat actor that emerged in late 2021, operating with apparent financial motivations through ransomware deployment and extortion activities. The group's origin and affiliations remain largely undocumented in public threat intelligence reporting, with limited information available about their operational structure or potential connections to other cybercriminal organizations. Based on available data, Rook has demonstrated a focused targeting approach primarily against entities within the United States, though specific details about their initial access vectors, technical capabilities, and operational methodologies have not been extensively documented by major security firms or government agencies. The group's relatively small victim count of nine documented cases suggests either limited operational capacity, a selective targeting approach, or potentially short operational windows between campaigns. Given the limited public documentation from established threat intelligence sources like CISA, FBI, or major security vendors, Rook appears to represent a lower-tier ransomware operation with restricted scope and impact compared to more prominent ransomware families, and their current operational status remains unclear due to insufficient public reporting on their recent activities.

Most-affected countries

Recent disclosures by Rook

All 9 indexed disclosures. Click any row for the full per-victim dossier.

See every disclosure indexed for Rook →

How we know this. Operator profiles on Darkfield are built from continuous monitoring of every leak site the group is known to operate, cross-correlated with community-curated feeds (RansomLook, ransomware.live, RansomWatch, MISP-galaxy). Status flips from active to inactive when no new disclosure appears for 60 days. MITRE ATT&CK mappings shown in the interactive section below are sourced from CISA, vendor analysis, and the MITRE community catalog — we attribute each technique back to its source. Aliases reflect operator re-brands and affiliate splits.

Inactive ransomware operator

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Rook

9 victims indexed · first seen 5 years ago · last activity 5 years ago

9
Victims indexed
#214 of 364 tracked operators
1m
Active period
Dec 2021 → Jan 2022
1
Countries hit
top United States · 2

At a glance

Status
inactive
First seen
5 years ago
Last activity
5 years ago
Onion sites
1 known endpoint

About

The Rook ransomware group is a relatively minor threat actor that emerged in late 2021, operating with apparent financial motivations through ransomware deployment and extortion activities. The group's origin and affiliations remain largely undocumented in public threat intelligence reporting, with limited information available about their operational structure or potential connections to other cybercriminal organizations. Based on available data, Rook has demonstrated a focused targeting approach primarily against entities within the United States, though specific details about their initial access vectors, technical capabilities, and operational methodologies have not been extensively documented by major security firms or government agencies. The group's relatively small victim count of nine documented cases suggests either limited operational capacity, a selective targeting approach, or potentially short operational windows between campaigns. Given the limited public documentation from established threat intelligence sources like CISA, FBI, or major security vendors, Rook appears to represent a lower-tier ransomware operation with restricted scope and impact compared to more prominent ransomware families, and their current operational status remains unclear due to insufficient public reporting on their recent activities.

References

11 links

External sources curated by the MISP threat-intel community.

Timeline

2 months
2021-12-01T00:00:00+00:00 · 82022-01-01T00:00:00+00:00 · 1
2021-12-01T00:00:00+00:002022-01-01T00:00:00+00:00

Top countries

🇺🇸 United States
2
United States dossier →

MITRE ATT&CK

4 techniques · 4 tactics

Tactics

Initial AccessExecutionDefense EvasionImpact

Techniques

Recent victims

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Onion infrastructure

1 known
  • http://gamol6n6p2p4c3ad7gxmx3ur7wwdwlywebo2azv3vv5qlmjmole2zbyd.onion

Source

Updated 5 years ago

Data on this page is sourced from the group's own leak posts, cross-checked with public ransomware trackers (RansomLook, ransomware.live, RansomWatch), MITRE ATT&CK, and our own Tor and Telegram crawlers. This is a public observatory page — share freely.

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