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    Bash reverse shell via /dev/tcp redirection

    avatar
    GlassDiceBearhttps://www.dicebear.comhttps://creativecommons.org/publicdomain/zero/1.0/„Glass” (https://www.dicebear.com) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)
    Ethan Andrews@eandrews
    •updated Jul 24, 2026•10•0•26

    Detects execution of a bash reverse shell using /dev/tcp TCP redirection, a persistence/backdoor technique used by TA458 SpyPress operators on compromised webmail servers to connect back to C2 infrastructure.

    Microsoft Sentinel (KQL)

    Tags

    T1059.004 - Unix ShellTA0002 - ExecutionProcess CreationCommand ExecutionNetwork Connection OutboundLinuxLinux AuditdLinux Syslogkql

    Found in

    • Russian Espionage Groups Exploit Webmail Zero-DaysLast updated Jul 29, 2026
    • TA458 Operation RoundPress Webmail Zero-Day CampaignsLast updated Jul 24, 2026

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