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New Project CAV3RN module abuses Outlook calendar events for C2 and DNS AAAA records for configuration recovery

July 21, 2026 · Kaspersky (Securelist) · Severity: MEDIUM

Project CAV3RN cyberespionage framework abuses Outlook calendar events for C2 and DNS AAAA records for configuration recovery.

Key Takeaways

  • We have been tracking this cluster since December 2025, and in late April 2026, we observed a major architectural shift: the developers moved from a t. Introduction In June 2026, as part of our Kaspersky Threat Intelligence Reporting service, we published extensive research on Project CAV3RN, a sophi.
  • Subsequently, Check Point Research publicly reported on the same controller-based architecture in July 2026.
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