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Operator dossier

bert is a ransomware operator no longer publishing new disclosures. Darkfield has indexed 7 public victims claimed by this operator between April 6, 2025 and June 10, 2025. The "bert" ransomware group is a recently emerged threat actor first observed in April 2025, appearing to be financially motivated based on their ransomware operations targeting multiple sectors across several countries. Given the limited public documentation and recent emergence, the group's origin and affiliations remain unclear, though their targeting pattern suggests either independent operations or a small-scale ransomware-as-a-service model. With only seven documented victims to date, specific details about their attack methodology, initial access vectors, and encryption techniques have not been extensively documented by major security firms or law enforcement agencies. The group has demonstrated a diverse targeting approach, focusing primarily on organizations in the United States, Malaysia, Taiwan, the United Kingdom, and Turkey, with victims spanning technology, business services, healthcare, and transportation/logistics sectors. No major high-profile campaigns or significant law enforcement actions have been publicly reported against this group, likely due to their recent emergence and relatively small scale of operations. The group appears to remain active as of their recent first observation, though their limited victim count and lack of extensive public documentation suggest they are either a nascent operation or a low-profile threat actor that has not yet attracted significant attention from major cybersecurity researchers or government agencies.

Most-targeted sectors

Most-affected countries

Recent disclosures by bert

All 7 indexed disclosures. Click any row for the full per-victim dossier.

See every disclosure indexed for bert →

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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bert

7 victims indexed · first seen 1 year ago · last activity 1 year ago

7
Victims indexed
#229 of 364 tracked operators
2m
Active period
Apr 2025 → Jun 2025
6
Countries hit
top US · 2

At a glance

Status
inactive
First seen
1 year ago
Last activity
1 year ago
Onion sites
1 known endpoint
Primary sector
Not Found · 2 hits

About

The "bert" ransomware group is a recently emerged threat actor first observed in April 2025, appearing to be financially motivated based on their ransomware operations targeting multiple sectors across several countries. Given the limited public documentation and recent emergence, the group's origin and affiliations remain unclear, though their targeting pattern suggests either independent operations or a small-scale ransomware-as-a-service model. With only seven documented victims to date, specific details about their attack methodology, initial access vectors, and encryption techniques have not been extensively documented by major security firms or law enforcement agencies. The group has demonstrated a diverse targeting approach, focusing primarily on organizations in the United States, Malaysia, Taiwan, the United Kingdom, and Turkey, with victims spanning technology, business services, healthcare, and transportation/logistics sectors. No major high-profile campaigns or significant law enforcement actions have been publicly reported against this group, likely due to their recent emergence and relatively small scale of operations. The group appears to remain active as of their recent first observation, though their limited victim count and lack of extensive public documentation suggest they are either a nascent operation or a low-profile threat actor that has not yet attracted significant attention from major cybersecurity researchers or government agencies.

References

8 links

External sources curated by the MISP threat-intel community.

Timeline

3 months
2025-04-01T00:00:00+00:00 · 32025-05-01T00:00:00+00:00 · 22025-06-01T00:00:00+00:00 · 2
2025-04-01T00:00:00+00:002025-06-01T00:00:00+00:00

Top countries

🇺🇸 United States
2
🇲🇾 Malaysia
1
🇹🇼 Taiwan
1
🇬🇧 United Kingdom
1
🇹🇷 Türkiye
1
🇨🇴 Colombia
1
United States dossier →Malaysia dossier →Taiwan dossier →United Kingdom dossier →

Top sectors

Technology
2
Business Services
1
Healthcare
1
Transportation/Logistics
1
Technology dossier →Business Services dossier →Healthcare dossier →Transportation/Logistics dossier →

MITRE ATT&CK

56 techniques · 13 tactics

Tactics

CollectionCommand And ControlCredential AccessDefense ImpairmentDiscoveryExecutionInitial AccessLateral MovementPersistencePrivilege EscalationReconnaissanceResource DevelopmentStealth

Techniques

Recent victims

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Onion infrastructure

1 known
  • http://bertblogsoqmm4ow7nqyh5ik7etsmefdbf25stauecytvwy7tkgizhad.onion

Source

Updated 1 year 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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