CL0P Ransomware Group Allegedly Compromises Entrust via Oracle EBS 0-Day

The Cl0P ransomware group has claimed responsibility for compromising Entrust, a major provider of digital identity and certificate management services, by exploiting a newly discovered zero-day vulnerability in Oracle E-Business Suite (EBS), tracked as CVE-2025-61882 .Because of Entrust’s wide enterprise reach, this alleged breach raises serious concerns about supply-chain and enterprise-application risk.

Threat Actor & Tactics

• Actor: Cl0P – Cl0P Ransomware Group, known for high-impact extortion schemes and targeting supply chain vulnerabilities.
• Attack Vector : Exploitation of zero-day or high-value vulnerabilities.
   
  • Initial access → lateral movement → data exfiltration → encryption/double-extortion. T
 
• Target profile: Enterprise software  suites and critical infrastructure.

Vulnerability & Impact

• Vulnerability: CVE-2025-61882 in Oracle EBS – a zero-day meaning no prior patch or public fix at time of disclosure.
• Affected environment: Oracle E-Business Suite (ERP, CRM, SCM) widely deployed in industry and enterprise settings.
• Potential impact:
  
   
  • Unauthorized access to business processes and data.
   
  • Full compromise of enterprise systems, supply-chain impact.
   
  • Data exfiltration and ransom demands.

Affected Stakeholders

• Organizations using Oracle EBS.
• Businesses relying on Entrust for digital identity, encryption, or certificate services.
• Enterprises engaging in shared supply-chain systems with Entrust or Oracle EBS components.

Recommendation

• Apply patches when available.
• Restrict access to Oracle EBS: network segmentation, restricted admin access, MFA enforcement.
• Audit for indicators of compromise (IOCs):
   
  • New app users or unknown processes in EBS.
   
  • Unusual network flows or API calls from EBS modules.
   
  • Large data transfers out of EBS once unknown.
 
• Implement logging & SIEM correlation: Ensure detailed logs for EBS activities and integrate into SIEM for anomaly detection.
• Backup & recovery preparedness: Ensure immutable off-site backups of EBS/Entrust data.
• Incident readiness: Update IR plans to include zero-day exploitation of enterprise apps and supply-chain vectors.