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Non sudo setuid

Detect attempts to change users through the use of setuid, with exceptions for sudo/su. The users "root" and "nobody" using setuid on themselves are also excluded, as setuid calls in these cases typically involve reducing privileges. By setting the setuid bit, an attacker could execute code in a different user's context, potentially with higher privileges. One drawback is the potential for noise, as many applications legitimately use this approach.

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Detection Logic

evt.type=setuid and (known_user_in_container or not container) and not (user.name=root or user.uid=0) and not somebody_becoming_themselves and not proc.name in (known_setuid_binaries, userexec_binaries, mail_binaries, docker_binaries,
                      nomachine_binaries)
and not proc.name startswith "runc:" and not java_running_sdjagent and not nrpe_becoming_nagios and not user_known_non_sudo_setuid_conditions

Field Validations

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