Detectionhighexperimental

Shell Execution via Rsync - Linux

Detects the use of the "rsync" utility to execute a shell. Such behavior may be associated with privilege escalation, unauthorized command execution, or to break out from restricted environments.

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Launch

Li Ling, Andy Parkidomo, Robert Rakowski, Blake Hartstein (Bloomberg L.P.), Florian Roth (Nextron Systems)Created Mon Sep 02Updated Sat Jan 18e2326866-609f-4015-aea9-7ec634e8aa04linux

Log Source

LinuxProcess Creation

ProductLinux← raw: linux

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection_img:
        Image|endswith:
            - '/rsync'
            - '/rsyncd'
        CommandLine|contains: ' -e '
    selection_cli:
        CommandLine|contains:
            - '/ash '
            - '/bash '
            - '/dash '
            - '/csh '
            - '/sh '
            - '/zsh '
            - '/tcsh '
            - '/ksh '
            - "'ash "
            - "'bash "
            - "'dash "
            - "'csh "
            - "'sh "
            - "'zsh "
            - "'tcsh "
            - "'ksh "
    condition: all of selection_*