This record tracks a ransomware attack claimed by the
sinobi group against
HOEHNER RESEARCH & CONSULTING GROUP. 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.
-57days
t1 · Published
t2 · Disclosed
Business Category
Services
Published
October 17, 2025
Disclosed / Notified
Aug 22, 2025
Attack Summary
HOEHNER RESEARCH & CONSULTING GROUP GmbH is a company that operates in the Advertising & Marketing industry. It employs 50to99 people and has 5Mto10M of revenue. The company is headquartered in Bonn, Nordrhein-Westfalen, Germany.
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 hrcg.eu
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
24
found in Traditional breaches
0
found in Ransomware leaks
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••• emails
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••• emails
moonpay_2024_full.txt
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••• emails
Trello_BF.7z
Database World ROC · breach
••• 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.