Stephenson Ziegenhorn & Bernard
qilinThis record tracks a ransomware attack claimed by the qilin group against Stephenson Ziegenhorn & Bernard. 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 GAPWindow 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.
Attack Summary
The organization Stephenson Ziegenhorn & Bernard appears on the qilin ransomware leak site. It operates in the Finance / Legal / Insurance sector. The affected entity is based in United States. The incident was first observed on February 02, 2026. This record is maintained by Breach House as part of its ongoing monitoring of public ransomware leak sites.
Leak Screenshots
SAMPLEProof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.