This record tracks a ransomware attack claimed by the
medusa group against
Hartwig Mechanical Inc. 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.
-53days
t1 · Published
t2 · Disclosed
Business Category
Construction / Real Estate
Disclosed / Notified
Apr 18, 2025
Attack Summary
Hartwig Mechanical Inc is a company that operates in the Commercial & Residential Construction industry. It employs 10to19 people and has 1Mto5M of revenue. The company is headquartered in 20800 E. Brink Street Harvard, IL 60033
The total amount of data leakage is 456 GB
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.
Dark Web Exposure
Findings for hartwigmechanical.com
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
4
found in Traditional breaches
28
found in Ransomware leaks
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••• emails
Energenecs
play · ransomware
••• emails
Leak volumes are locked
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Legal Disclaimer:
This ransomware victim record reflects information published on the operator's leak site.
Breach.house does not acquire, download, host, access or redistribute unlawfully obtained data. It indexes only publicly visible information posted by ransomware, breach and infostealer operators and open web sources, without accessing the underlying stolen content. The service supports public awareness, legitimate research and cyber-resilience.