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Highmark Companies

play

This record tracks a ransomware attack claimed by the play group against Highmark Companies. 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.

295days open
t1 · Published t2 · Pending
Nov 11, 2025Not disclosed yet
Country
United States
Business Category
Public Sector
Employees
51-100
Discovered
2025-11-20
Published
November 11, 2025
Disclosed / Notified
Not disclosed yet
Victim ID
EX6WvnJsc3YH

Attack Summary

United States

Leak Screenshots

SAMPLE

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file_tree.png
finance_2024.xlsx
passport_scan.jpg
contract_signed.pdf
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What's In This Leak

Composition analysis from Have I Been Ransom · ransomware leak.
71,780
Records
6
File types
YES
Identity documents present
xlsx 51,550 records · 104 files
csv 19,944 records · 39 files
•••• •••••••• records · ••••• files
•••• •••••••• records · ••••• files
•••• •••••••• records · ••••• files
•••• •••••••• records · ••••• files
Emails
•••••••
Corporate
••••••
••%
Personal
••••••
••%
Identity documents
••••
••% of records
Full composition is locked
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Dark Web Exposure

Findings for highmarkcos.com — indexed by HaveIBeenRansom.
0
found in Infostealer logs
21+
found in Traditional breaches
2,979+
found in Ransomware leaks
Highmark Companies
play · ransomware
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
WALSER AUTOMOTIVE GROUP
play · ransomware
••• emails
UnderArmour_BF_.7z.001
Database World ROC · breach
••• emails
HomeChef_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
DL| Database catalog · breach
••• emails
B F R e p o V 3 F i l e s · breach
••• emails
Database World ROC · breach
••• emails
+ 4 more leak sources locked
Leak volumes are locked
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