The article discusses a new malware threat known as Hollowgraph, which distinguishes itself by utilizing the Microsoft Graph API for its Command and Control (C2) communication. This approach allows the malware to hide its activities within legitimate Microsoft 365 traffic, making it extremely difficult for security tools to distinguish malicious requests from standard enterprise operations.
By leveraging trusted cloud infrastructure, Hollowgraph evades domain-based filtering and traditional signature-based detection. This technique represents a sophisticated trend where attackers abuse legitimate APIs and cloud services to maintain persistent access and exfiltrate data while remaining under the radar of typical security monitoring.
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