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Sejlstrup

thegentlemen

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

231days open
t1 · Published t2 · Pending
Feb 27, 2026Not disclosed yet
Country
Denmark
Business Category
Communication / Marketing
Employees
101-1000
Date
February 27, 2026
Indexed by Breach House
February 27, 2026
Leak Status
pending
Disclosed / Notified
Not disclosed yet
Victim ID
PaRHUWrh4xwM

Attack Summary

sejlstrup.dk ***.com/business-directory/company-profiles.sejlstrup_entreprenørforretning_a-s.f02d652f10fa8eb32e3503df8d0d3eb0.html a major construction and contracting company established in 1991 . The company employs 150 people and reported a gross profit of 101.6 million DKK (approx. 13.6 million EUR) in 2023, with excellent profitability ratings . The business is owned by the holding company SEJLSTRUP HOLDING II ApS .

Leak Screenshots

1 CAPTURED

Captured directly from the operator's leak site by our collector. Verdict evidence: listed on the leak site; no evidence of publication yet

Leak site capture 2026-10-10
2026-10-10

Capture history — 5 day(s) tracked. Content is locked.

2026-10-10
2026-10-09
2026-10-06
2026-10-05
2026-09-30
Showing the latest capture only
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Dark Web Exposure

Findings for sejlstrup.dk — indexed by HaveIBeenRansom.
0
found in Infostealer logs
10
found in Traditional breaches
0
found in Ransomware leaks
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••• emails
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B F R e p o V 3 F i l e s · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
Leak volumes are locked
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