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FMS

thegentlemen

This record tracks a ransomware attack claimed by the thegentlemen group against FMS. 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.

117days open
t1 · Published t2 · Pending
May 06, 2026Not disclosed yet
Country
United States
Business Category
IT
Employees
0-50
Discovered
2026-05-06
Published
May 06, 2026
Disclosed / Notified
Not disclosed yet
Victim ID
f85Qhvf516E9

Attack Summary

fmsinc.com zoominfo.com/c/fms-inc/14729979 FMS, Inc. is a privately held American software company founded in 1986 by Luke Chung (Harvard graduate), headquartered in Vienna, Virginia, near Washington DC. The company is the world's leading developer of tools for Microsoft Access, and a top vendor for SQL Server, Visual Studio .NET, and Visual Basic communities, with tens of thousands of customers across 100+ countries, including 90 of the Fortune 100 and every US federal government department. FMS is a Microsoft Gold Certified Partner, has won over 40 industry awards, and is recognized as one of the SD Times Top 100 most innovative software firms. It also offers custom software development consulting and its own Sentinel Visualizer link analysis product, used by intelligence and law enforcement agencies

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 fmsinc.com — indexed by HaveIBeenRansom.
151
found in Infostealer logs
1,214+
found in Traditional breaches
56+
found in Ransomware leaks
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TheUnderground - Reborn · breach
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••• emails
Colonial Surety Company
medusa · ransomware
••• emails
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
Database World ROC · breach
••• emails
Database World ROC · breach
••• emails
formaceft_db · breach
••• emails
+ 17 more leak sources locked
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