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DevThe Hacker Newsabout 3 hours ago
Cavern C2 Blends DNS and Google Apps ScriptCavern C2 now uses DNS A-record responses to choose between direct HTTPS and a Google Apps Script relay per transaction, rotating the Google channel via DNS. Kaspersky also found HOLLOWGRAPH, which abuses Microsoft 365 calendars as covert C2 channels, with events dated 13 May 2050.
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