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Darkfield

Operator dossier

fulcrumsec is a ransomware operator currently active on public leak sites. Darkfield has indexed 25 public victims claimed by this operator between May 1, 2026 and June 16, 2026. FulcrumSec is a recently emerged ransomware group that was first observed in May 2026, operating with apparent financial motivations based on their targeting patterns across multiple countries and high-value sectors. Given the recency of their emergence and limited public documentation, the group's specific country of origin and potential affiliations remain unclear, though their targeting of victims across the United States, India, Netherlands, Colombia, and Japan suggests either a geographically distributed operation or deliberate international scope rather than nation-state backing. The group has demonstrated a preference for targeting technology companies, business services firms, and healthcare organizations, with 21 documented victims indicating a selective approach focused on sectors likely to yield significant ransom payments due to operational dependencies and sensitive data holdings. Their attack methodology details remain largely undocumented in public threat intelligence reports from major security firms, though their sector targeting suggests sophisticated initial access capabilities given the typically robust security postures of technology and healthcare organizations. No major high-profile campaigns or significant law enforcement actions against FulcrumSec have been publicly reported by CISA, FBI, or leading cybersecurity researchers as of available intelligence. The group appears to remain active as of the most recent observations, though the limited public intelligence on their operations suggests they may be maintaining a relatively low profile compared to more established ransomware enterprises.

Most-targeted sectors

Most-affected countries

Recent disclosures by fulcrumsec

All 25 indexed disclosures. Click any row for the full per-victim dossier.

See every disclosure indexed for fulcrumsec →

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.

Active ransomware operator

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fulcrumsec

25 victims indexed · first seen 2 months ago · last activity 29 days ago

25
Victims indexed
#152 of 364 tracked operators
1m
Active period
May 2026 → Jun 2026
9
Countries hit
top US · 8

At a glance

Status
active
First seen
2 months ago
Last activity
29 days ago
Onion sites
1 known endpoint
Primary sector
Technology · 6 hits

About

FulcrumSec is a recently emerged ransomware group that was first observed in May 2026, operating with apparent financial motivations based on their targeting patterns across multiple countries and high-value sectors. Given the recency of their emergence and limited public documentation, the group's specific country of origin and potential affiliations remain unclear, though their targeting of victims across the United States, India, Netherlands, Colombia, and Japan suggests either a geographically distributed operation or deliberate international scope rather than nation-state backing. The group has demonstrated a preference for targeting technology companies, business services firms, and healthcare organizations, with 21 documented victims indicating a selective approach focused on sectors likely to yield significant ransom payments due to operational dependencies and sensitive data holdings. Their attack methodology details remain largely undocumented in public threat intelligence reports from major security firms, though their sector targeting suggests sophisticated initial access capabilities given the typically robust security postures of technology and healthcare organizations. No major high-profile campaigns or significant law enforcement actions against FulcrumSec have been publicly reported by CISA, FBI, or leading cybersecurity researchers as of available intelligence. The group appears to remain active as of the most recent observations, though the limited public intelligence on their operations suggests they may be maintaining a relatively low profile compared to more established ransomware enterprises.

References

1 link

External sources curated by the MISP threat-intel community.

Timeline

1 months
2026-05-01T00:00:00+00:00 · 21
2026-05-01T00:00:00+00:002026-05-01T00:00:00+00:00

Top countries

🇺🇸 United States
8
🇮🇳 India
2
🇳🇱 Netherlands
1
🇨🇴 Colombia
1
🇯🇵 Japan
1
🇬🇧 United Kingdom
1
🇦🇺 Australia
1
🇩🇪 Germany
1
United States dossier →India dossier →Netherlands dossier →Colombia dossier →

Top sectors

Technology
6
Business Services
4
Healthcare
2
Consumer Services
2
Financial Services
2
Manufacturing
1
Telecommunication
1
Technology dossier →Business Services dossier →Healthcare dossier →Consumer Services dossier →

MITRE ATT&CK

9 techniques · 7 tactics

Tactics

Initial AccessExecutionPersistenceDefense EvasionDiscoveryCollectionImpact

Techniques

  • T1190Exploit Public-Facing Application
  • T1566Phishing
  • T1059Command and Scripting Interpreter
  • T1053Scheduled Task/Job
  • T1027Obfuscated Files or Information
  • T1082System Information Discovery
  • T1083File and Directory Discovery
  • T1005Data from Local System
  • T1486Data Encrypted for Impact

Recent victims

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Onion infrastructure

1 known
  • http://4e3p3in2bl67hxchuwza7qvnpe7pyeloyztr5fnh257fxkovfhappjyd.onion

Source

Updated 29 days 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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