INSPECTING ARCHIVED INTELLIGENCE (OUTDATED VERSION).

Everest Ransomware Group Claims to Have Stolen PwC Data

| 2026-10-23 05:55 HIGH LOW RANSOMWARE & EXTORTION DATA BREACH
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Executive Summary
AI-generated
The Everest ransomware group claims to have stolen 590.69 GB of data from PwC, a global professional services firm, on October 22, 2026. The alleged data theft includes human resources records, training materials, and internal documents, with the total amount of stolen data being approximately 590 GB. This incident is attributed to the ransomware group claiming responsibility for the breach, which has not yet been verified by PwC. Hackmanac's public alert reported on October 22, 2026, stating that the Everest ransomware group had listed their claim, while Cyber Security News also referenced this incident.
Technical Mitigations AI-generated
• Reset credentials and API keys that may have been exposed, and review access logs for the affected accounts or integrations.
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Intelligence Metadata
Actors / Malware / CVEs / Campaigns
Target & Sectors
Global Scope
Incident Timeline
‎October 22, 2026
Hackmanac's public alert reported that the Everest Ransomware Group claimed to have stolen 590 GB of data from PwC.
data_breach 590 GB
Hackmanac’s public alert […] The post PwC Data Breach Claim – Everest Ransomware Group Claims to Have Stolen 590 GB of Data appeared first on Cyber Security News .
organisation Hackmanac
Hackmanac’s public alert […] The post PwC Data Breach Claim – Everest Ransomware Group Claims to Have Stolen 590 GB of Data appeared first on Cyber Security News .
organisation Cyber Security News
Hackmanac’s public alert […] The post PwC Data Breach Claim – Everest Ransomware Group Claims to Have Stolen 590 GB of Data appeared first on Cyber Security News .
‎2026/10/23
The Everest ransomware group claims to have stolen 590.69 GB of data from PwC, a global professional services firm.
organisation PwC Data Breach Claim – Everest Ransomware Group
PwC Data Breach Claim – Everest Ransomware Group Claims to Have Stolen 590 GB of Data.
data_breach 590 GB
PwC Data Breach Claim – Everest Ransomware Group Claims to Have Stolen 590 GB of Data.
data_breach 590.69 GB
The Everest ransomware group claims to have stolen 590.69 GB of data from PwC, the global professional services firm.
Tactical Metrics
Metrics
data_breach
590
Gb
PwC Data Breach Claim – Everest Ransomware Group Claims to Have Stolen 590 GB of Data.
Hackmanac’s public alert […] The post PwC Data Breach Claim – Everest Ransomware Group Claims to Have Stolen 590 GB of Data appeared first on Cyber Security News .
Metrics
data_breach
591
Gb
The Everest ransomware group claims to have stolen 590.69 GB of data from PwC, the global professional services firm.
Intelligence Sources
AlienVault OTX 2026-10-23