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Warlock Ransomware Exploits Vulnerable SharePoint Servers

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📰 1 unique sources, 1 articles

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Warlock ransomware exploits vulnerabilities in on-premises Microsoft SharePoint servers to gain access to and encrypt data in targeted environments. The ransomware, believed to be a derivative of LockBit 3.0, leverages flaws in SharePoint to escalate privileges and deploy ransomware across networks. The campaign targets multiple sectors, including government agencies and private organizations, and has been linked to the threat actor Storm-2603. The vulnerabilities exploited by Warlock include CVE-2025-49706, CVE-2025-49704, CVE-2025-53770, and CVE-2025-53771. These flaws allow for spoofing and remote code execution, enabling the ransomware to infiltrate and compromise systems. Microsoft has released patches for these vulnerabilities, but many organizations remain unpatched. Warlock's tactics include privilege escalation, network reconnaissance, and the use of tools like Mimikatz for credential dumping. The ransomware also employs Cloudflare's tunneling service for command-and-control communication and targets security software to evade detection.

Timeline

  1. 21.08.2025 00:04 📰 1 articles · ⏱ 26d ago

    Warlock Ransomware Exploits SharePoint Vulnerabilities

    Warlock ransomware, a derivative of LockBit 3.0, targets on-premises Microsoft SharePoint servers using vulnerabilities CVE-2025-49706, CVE-2025-49704, CVE-2025-53770, and CVE-2025-53771. The ransomware campaign, linked to the threat actor Storm-2603, involves privilege escalation, network reconnaissance, and the use of tools like Mimikatz for credential dumping. Warlock employs Cloudflare's tunneling service for command-and-control communication and targets security software to evade detection. Microsoft has released patches for the vulnerabilities, but many organizations remain unpatched. The ransomware has targeted multiple sectors, including government agencies and private organizations, and has been observed conducting extensive reconnaissance within compromised environments.

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