Threat Advisories:

APT41 Leverages Google Calendar for Command and Control

Red | Attack Report
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APT41’s operation used sophisticated malware, TOUGHPROGRESS, which covertly leveraged trusted cloud services like Google Calendar for command-and-control, bypassing traditional defenses. The campaign reflects a broader shift toward stealthy, cloud-integrated malware ecosystems designed to evade detection, complicate threat hunting, and elevate operational risk for organizations worldwide.

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