This record tracks a ransomware attack claimed by the
direwolf group against
🇹🇼
YIEH UNITED STEEL CORP. 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.
329days open
t1 · Published
t2 · Pending
Business Category
Manufacturing / Engineering
Indexed by Breach House
October 15, 2026
Leak Status
leaked
checked 2026-10-15
Disclosed / Notified
Not disclosed yet
Attack Summary
yusco.com.tw is a Taiwan-based entity operating within the manufacturing and engineering sector, providing industrial-focused products, services, or technical solutions relevant to production and engineering workflows. The entity is cataloged as a ransomware victim associated with the threat actor Direwolf. This listing reflects its inclusion within a threat-intelligence index documenting cybersecurity incidents and adversary activity. No specific breach details, data exfiltration scope, ransom terms, or confirmed incident metrics are provided here, in accordance with strict factual neutrality. The record serves to index the entity’s relationship to Direwolf within ransomware-victim intelligence.
Leak Screenshots
1 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-10-15. Verdict evidence: [M1] Leaked Data Types:Internal Documents, Financial Documents, Email Backups, Legal Documents, Database Backups
Showing the latest capture only
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Dark Web Exposure
Findings for yusco.com.tw
— indexed by HaveIBeenRansom.
0
found in Infostealer logs
8
found in Traditional breaches
0
found in Ransomware leaks
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
Cit0day [cit0day.in] breaches.csv
LKnet reserve chat · breach
••• emails
Full Clouds Cit0day_2.7z.001
DBs w MTDT · breach
••• emails
Yam_BF.7z
TheUnderground - Reborn · breach
••• emails
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