ThreatCluster

Cloud Atlas Targets Organizations Using Microsoft Office Vulnerabilities

First seen 19 Dec 2025, 21:58 UTC • •26

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ThreatCluster •March 12, 2026 at 13:27 UTC

The Cloud Atlas hacker group has been exploiting outdated Microsoft Office vulnerabilities to deploy backdoor implants in organizations across Eastern Europe and Central Asia during the first half of 2025. This campaign aims to establish persistent access and extract sensitive data from high-value targets.

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Threat Graph

4 entities, 3 inferred relationships (STIX 2.1).

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Threat Actor (1)

Cloud Atlas

Technique (2)

Data Breach
Malware

Affected Platform (1)

Microsoft Office

Relationships

Cloud Atlas uses Data Breach
Cloud Atlas uses Malware
Cloud Atlas related to Microsoft Office

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