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MCO

fulcrumsec

This record tracks a ransomware attack claimed by the fulcrumsec group against MCO. It collects the publicly disclosed attack details — sector, location and timeline — as published on the operator's leak site and indexed by Breach House.

Window Zero

EXPOSURE GAP

Window Zero is the time the breach stayed in the open before anyone said so — the gap between when the attack was first discovered on the operator's leak site (t1) and when it was publicly disclosed (t2). The wider this window, the longer victims, staff and customers were exposed with no warning.

122days open
t1 · Published t2 · Pending
May 01, 2026Not disclosed yet
Country
United States
Business Category
Finance / Legal / Insurance
Employees
101-1000
Discovered
2026-05-01
Published
May 01, 2026
Disclosed / Notified
Not disclosed yet
Victim ID
rHGFwP3CFubw

Attack Summary

[AI generated] N/A The acronym "MCO" is too ambiguous to identify a specific company with confidence. Multiple organizations share this abbreviation across different industries and countries. Please provide additional context such as the full company name, industry, or country of operation to allow for an accurate and reliable description.

Leak Screenshots

SAMPLE

Proof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.

file_tree.png
finance_2024.xlsx
passport_scan.jpg
contract_signed.pdf
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Dark Web Exposure

Findings for mycomplianceoffice.com — indexed by HaveIBeenRansom.
25
found in Infostealer logs
168+
found in Traditional breaches
101+
found in Ransomware leaks
OTA Management
play · ransomware
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
SevenRooms_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
— · breach
••• emails
Database World ROC · breach
••• emails
medusa · ransomware
••• emails
+ 17 more leak sources locked
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Visit Website Original Post View Group: fulcrumsec

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Legal Disclaimer: This ransomware victim record reflects information published on the operator's leak site. Breach.house only records what the operators themselves publish in the open. We take screenshots of their public pages and keep the proof material they post there, so that a listing can be verified and its status tracked over time. We do not purchase data, we do not solicit or encourage its publication, we do not access any private system, and we do not alter anything we record. Nothing is offered for download here, and detailed content is not published on this page or anywhere else on the public site: access to it is restricted to vetted customers under contract, for incident response, due diligence and cyber-resilience work. Breach.house is not affiliated with, and does not act on behalf of, the operators who publish this material. If you represent an organisation or individual named here and want a record reviewed or removed, contact us and we will act on it.