Capsh Shell Invocation - Linux

 1title: Capsh Shell Invocation - Linux
 2id: db1ac3be-f606-4e3a-89e0-9607cbe6b98a
 3status: experimental
 4description: |
 5        Detects the use of the "capsh" utility to invoke a shell.
 6references:
 7    - https://gtfobins.github.io/gtfobins/capsh/#shell
 8    - https://www.elastic.co/guide/en/security/current/linux-restricted-shell-breakout-via-linux-binary-s.html
 9author: Li Ling, Andy Parkidomo, Robert Rakowski, Blake Hartstein (Bloomberg L.P.)
10date: 2024-09-02
11tags:
12    - attack.execution
13    - attack.t1059
14logsource:
15    category: process_creation
16    product: linux
17detection:
18    selection:
19        Image|endswith: '/capsh'
20        CommandLine|endswith: ' --'
21    condition: selection
22falsepositives:
23    - Unknown
24level: high

References

• capsh | GTFOBins

  .. / capsh Shell SUID Sudo Shell It can be used to break out from restricted environments by spawning an interactive system shell. SUID If the binary has the SUID bit set, it does not drop the elev...

  
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• Linux Restricted Shell Breakout via Linux Binary(s) | Elastic Security Solution [8.15] | Elastic

  

  Linux Restricted Shell Breakout via Linux Binary(s) edit Identifies the abuse of a Linux binary to break out of a restricted shell or environment by spawning an interactive system shell. The activi...

  
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