Linux Setgid Capability Set on a Binary via Setcap Utility

Luc Génaux

Detects the use of the 'setcap' utility to set the 'setgid' capability (cap_setgid) on a binary file. This capability allows a non privileged process to make arbitrary manipulations of group IDs (GIDs), including setting its current GID to a value that would otherwise be restricted (i.e. GID 0, the root group). This behavior can be used by adversaries to backdoor a binary in order to escalate privileges again in the future if needed.

2026-01-24 00:00:00

None

3a716279-c18c-4488-83be-f9ececbfb9fc

attack.privilege-escalation attack.defense-evasion attack.persistence attack.t1548 attack.t1554

Community Rule

EzLucky

Merge PR #5771 from @EzLucky - Add and Update Setcap Related Rules

2026-01-24