Query: write Sigma for Detects the use of the 'setcap' utility to set the 'setgid' capability (cap_setgid) on a binary file. This capability al
Matching passage: Sigma rule: Detects the use of the 'setcap' utility to set the 'setgid' capability (cap_setgid) on a binary file. This capability al. Logsource: linux / process_creation. Rule: title: Linux Setgid Capability Set on a Binary via Setcap Utility id: 3a716279-c18c-4488-83be-f9ececbfb9fc status: experimental description: '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. ' references: - https://man7.org/linux/man-pages/man8/setcap.8.html - https://dfir.ch/posts/linux_capabilities/ - https://juggernaut-sec.com/capabilities/#cap_setgid author: Luc Génaux date: 2026-01-24 tags: - attack.privilege-escalation - attack.persistence - attack.t1548 - attack.t1554 logsource: product: linux category: process_creation detection: selection: Image|endswith: /setcap CommandLine|contains: cap_setgid condition: selection falsepositives: - Unknown level: low
Near-miss passage: Sigma rule: Detects suspicious call to the "ShellExec_RunDLL" exported function of SHELL32.DLL through the ordinal number to launch. Logsource: windows / process_creation. Rule: title: Suspicious ShellExec_RunDLL Call Via Ordinal id: 8823e85d-31d8-473e-b7f4-92da070f0fc6 related: - id: d87bd452-6da1-456e-8155-7dc988157b7d type: derived status: test description: 'Detects suspicious call to the "ShellExec_RunDLL" exported function of SHELL32.DLL through the ordinal number to launch other commands. Adversary might only use the ordinal number in order to bypass existing detection that alert on usage of ShellExec_RunDLL on CommandLine. ' references: - https://redcanary.com/blog/raspberry-robin/ - https://www.microsoft.com/en-us/security/blog/2022/10/27/raspberry-robin-worm-part-of-larger-ecosystem-facilitating-pre-ransomware-activity/ - https://github.com/SigmaHQ/sigma/issues/1009 - https://strontic.github.io/xcyclopedia/library/shell32.dll-65DA072F25DE83D9F83653E3FEA3644D.html author: Swachchhanda Shrawan Poudel date: 2024-12-01 tags: - attack.stealth - attack.t1218.011 logsource: category: process_creation product: windows detection: selection_parent_img: ParentCommandLine|contains: SHELL32.DLL selection_parent_ordinal: ParentCommandLine|contains: - '#568' - '#570' - '#572' - '#576' selection_susp_cli_parent: - ParentCommandLine|contains: - comspec - iex - Invoke- - msiexec - odbcconf - regsvr32 - ParentCommandLine|contains: - \Desktop\ - \ProgramData\ - \Temp\ - \Users\Public\ selection_susp_child_img: Image|endswith: - \bash.exe - \bitsadmin.exe - \cmd.exe - \cscript.exe - \curl.exe - \mshta.exe - \msiexec.exe - \msxsl.exe - \odbcconf.exe - \powershell.exe - \pwsh.exe - \regsvr32.exe - \schtasks.exe - \wmic.exe - \wscript.exe condition: all of selection_parent_* and 1 of selection_susp_* falsepositives: - Unknown level: high