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Operator dossier

Grief is a ransomware operator no longer publishing new disclosures. Darkfield has indexed 3 public victims claimed by this operator between May 26, 2021 and June 30, 2021. Grief is a ransomware group that emerged in May 2021, operating primarily as a financially motivated cybercriminal organization focused on extorting victims through file encryption and data theft. The group's country of origin and specific affiliations remain unclear based on publicly available intelligence, though they appear to operate independently rather than as part of a larger ransomware-as-a-service ecosystem. Grief employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publicly release the information if ransom demands are not met, with their encryption methods following standard ransomware deployment patterns seen across similar threat actors. The group has maintained a relatively low profile compared to major ransomware operations, with documented attacks primarily targeting education facilities within the United States, though their limited victim count of three known cases suggests either highly selective targeting or successful operational security that has kept many of their activities from public disclosure. Based on available reporting from established cybersecurity firms and law enforcement agencies, Grief remains active as of recent intelligence assessments, continuing to pose a threat to organizations particularly within the education sector.

Most-targeted sectors

Most-affected countries

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

All groups

Grief

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

3
Victims indexed
#280 of 364 tracked operators
1m
Active period
May 2021 → Jun 2021
1
Countries hit
top United States · 3

At a glance

Status
inactive
First seen
5 years ago
Last activity
5 years ago
Onion sites
2 known endpoints
Primary sector
Education Facilities · 3 hits

About

Grief is a ransomware group that emerged in May 2021, operating primarily as a financially motivated cybercriminal organization focused on extorting victims through file encryption and data theft. The group's country of origin and specific affiliations remain unclear based on publicly available intelligence, though they appear to operate independently rather than as part of a larger ransomware-as-a-service ecosystem. Grief employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publicly release the information if ransom demands are not met, with their encryption methods following standard ransomware deployment patterns seen across similar threat actors. The group has maintained a relatively low profile compared to major ransomware operations, with documented attacks primarily targeting education facilities within the United States, though their limited victim count of three known cases suggests either highly selective targeting or successful operational security that has kept many of their activities from public disclosure. Based on available reporting from established cybersecurity firms and law enforcement agencies, Grief remains active as of recent intelligence assessments, continuing to pose a threat to organizations particularly within the education sector.

References

6 links

External sources curated by the MISP threat-intel community.

Timeline

2 months
2021-05-01T00:00:00+00:00 · 12021-06-01T00:00:00+00:00 · 2
2021-05-01T00:00:00+00:002021-06-01T00:00:00+00:00

Top countries

🇺🇸 United States
3

Top sectors

Education Facilities
3

MITRE ATT&CK

4 techniques · 4 tactics

Tactics

Initial AccessExecutionDefense EvasionImpact

Techniques

  • T1566Phishing
  • T1059Command and Scripting Interpreter
  • T1027Obfuscated Files or Information
  • T1486Data Encrypted for Impact

Recent victims

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Onion infrastructure

2 known
  • http://griefcameifmv4hfr3auozmovz5yi6m3h3dwbuqw7baomfxoxz4qteid.onion
  • http://griefcameifmv4hfr3auozmovz5yi6m3h3dwbuqw7baomfxoxz4qteid.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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