Analytics Alerts

Browse the Cortex analytics alert reference.

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1 alert match the current filters. tactic: TA0005 ✕

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  • Rundll32.exe running with no command-line arguments Medium

    Rundll32.exe is meant to run with parameters, so the absence of them is extremely suspicious; this behavior is used in the default configuration of Cobalt Strike.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Stealth (TA0005)
    ATT&CK techniques: System Binary Proxy Execution: Rundll32 (T1218.011)
    Required data: XDR Agent
    Detector tags: LOLBIN Execution Analytics
    Attacker's goals: Run as a signed Microsoft executables to avoid detection. Rundll32 is the default process used by Cobalt Strike for running post-exploitation tools.
    Investigative actions: Check for any injection event to the Rundll32 process. Check the causality of execution for any injections.