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Henry Frerk Sons

thegentlemen

This record tracks a ransomware attack claimed by the thegentlemen group against Henry Frerk Sons. 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.

48days open
t1 · Published t2 · Pending
Jul 23, 2026Not disclosed yet
Country
United States
Business Category
Manufacturing / Engineering
Employees
51-100
Discovered
2026-07-23
Published
July 23, 2026
Disclosed / Notified
Not disclosed yet
Victim ID
LGqKAeEWi7bA

Attack Summary

***.com zoominfo.com/c/henry-frerk-sons-inc/44255454 Henry Frerk Sons (HFS Materials) is a premier masonry and plaster restoration supplier based in the Chicago region, with over 140 years of history. They specialize in custom matching and blending of historic mortars, concrete, and stone patching materials, alongside offering on-site volumetric ready-mix concrete services. The company provides a comprehensive range of building materials, including natural hydraulic lime, specialized cleaners, sealers, and preblended mortars for both historic preservation and new construction projects

Leak Screenshots

SAMPLE

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finance_2024.xlsx
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contract_signed.pdf
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Dark Web Exposure

Findings for hfsmaterials.com — indexed by HaveIBeenRansom.
0
found in Infostealer logs
78+
found in Traditional breaches
54+
found in Ransomware leaks
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