Detectionmediumtest

Disable Or Stop Services

Detects the usage of utilities such as 'systemctl', 'service'...etc to stop or disable tools and services on Linux systems. Attackers may stop or disable security tools and services to evade detection, maintain persistence, or disrupt system operations.

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Nasreddine Bencherchali (Nextron Systems)Created Thu Sep 15Updated Tue Mar 18de25eeb8-3655-4643-ac3a-b662d3f26b6blinux

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:
        Image|endswith:
            - '/service'
            - '/systemctl'
            - '/chkconfig'
        CommandLine|contains:
            - ' stop '
            - ' disable '
    filter_main_legit_snapd:
        Image|endswith: '/systemctl'
        CommandLine|contains:
            - '--no-reload disable snap-snapd-'
            - ' stop snap-snapd-'
    filter_main_ssh_preinstall:
        Image|endswith: '/systemctl'
        ParentCommandLine|contains: 'tmp.ci/preinst upgrade'
        CommandLine|contains|all:
            - ' stop '
            - 'ssh.'
    filter_main_ubuntu_upgrade:
        ParentCommandLine|contains: '/dpkg/info/ubuntu-pro-client.prerm upgrade'
        Image|endswith: '/systemctl'
    filter_optional_aws_agent:
        Image|endswith: '/systemctl'
        CommandLine|endswith: 'snap.amazon-ssm-agent.amazon-ssm-agent.service'
    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*