System Owner or User Discovery - Linux

calendar Dec 1, 2024 · attack.discovery attack.t1033  ·
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Detects the execution of host or user discovery utilities such as "whoami", "hostname", "id", etc. Adversaries may use the information from System Owner/User Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.

Sigma rule (View on GitHub)

 1title: System Owner or User Discovery - Linux
 2id: 9a0d8ca0-2385-4020-b6c6-cb6153ca56f3
 3status: test
 4description: |
 5    Detects the execution of host or user discovery utilities such as "whoami", "hostname", "id", etc.
 6    Adversaries may use the information from System Owner/User Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.    
 7references:
 8    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1033/T1033.md
 9author: Timur Zinniatullin, oscd.community
10date: 2019-10-21
11modified: 2024-11-30
12tags:
13    - attack.discovery
14    - attack.t1033
15logsource:
16    product: linux
17    service: auditd
18detection:
19    selection:
20        type: 'EXECVE'
21        a0:
22            - 'hostname'
23            - 'id'
24            - 'last'
25            - 'users'
26            - 'w'
27            - 'who'
28            - 'whoami'
29    condition: selection
30falsepositives:
31    - Admin activity
32level: low

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