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