This record tracks a ransomware attack claimed by the
Curious Worm group against
marquiscompanies.com. 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.
0days open
t1 · Published
t2 · Pending
Business Category
Construction / Real Estate
Indexed by Breach House
November 11, 2026
Leak Status
pending
checked 2026-11-11
Disclosed / Notified
Not disclosed yet
Attack Summary
Marquis Companies is a United States-based construction and real estate enterprise. The firm operates across the building and property development sectors, providing construction services and real estate solutions to commercial and residential clients. Marquis Companies was listed as a ransomware victim associated with the Curious Worm threat actor. This listing indicates the organization was identified in connection with ransomware activity attributed to that group. The entry provides context for security professionals tracking ransomware impacts on the construction and real estate industry.
Leak Screenshots
1 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-11-11. Verdict evidence: [M1] ONBASE-PRO-PROL-OMEGA PRO FULL COPY ONLY_2026_2028
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Dark Web Exposure
Findings for marquiscompanies.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
8,619
found in Traditional breaches
0
found in Ransomware leaks
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