Sigma rule: Capsh Shell Invocation - Linux

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-15db2f9166f8, updated 2024-09-02T00:00:00.000Z.

Rule

Title: Capsh Shell Invocation - Linux
Status: test
Level: high
Author: Li Ling, Andy Parkidomo, Robert Rakowski, Blake Hartstein (Bloomberg L.P.)
Date: 2024-09-02
File: rules/linux/process_creation/proc_creation_lnx_capsh_shell_invocation.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of the "capsh" utility to invoke a shell.

Log source

product: linux
category: process_creation

Detection

selection:
    Image|endswith: '/capsh'
    CommandLine|endswith: ' --'
condition: selection

False positives (as the rule lists them)

Unknown

MITRE ATT&CK ids this rule names

T1059

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_capsh_shell_invocation.yml

Sources and licences

SigmaHQ
"Capsh Shell Invocation - Linux" by Li Ling, Andy Parkidomo, Robert Rakowski, Blake Hartstein (Bloomberg L.P.) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_capsh_shell_invocation.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Capsh Shell Invocation - Linux",
entity page, dataset version ref-15db2f9166f8, updated 2024-09-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/db1ac3be-f606-4e3a-89e0-9607cbe6b98a (accessed 2026-11-03).
Underlying source: SigmaHQ rule db1ac3be-f606-4e3a-89e0-9607cbe6b98a, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.