Security Privileges Enumeration Via Whoami.EXE

Detects a whoami.exe executed with the /priv command line flag instructing the tool to show all current user privileges. This is often used after a privilege escalation attempt.

Sigma rule (View on GitHub)

 1title: Security Privileges Enumeration Via Whoami.EXE
 2id: 97a80ec7-0e2f-4d05-9ef4-65760e634f6b
 3status: test
 4description: Detects a whoami.exe executed with the /priv command line flag instructing the tool to show all current user privileges. This is often used after a privilege escalation attempt.
 5references:
 6    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/whoami
 7author: Florian Roth (Nextron Systems)
 8date: 2021/05/05
 9modified: 2023/02/28
10tags:
11    - attack.privilege_escalation
12    - attack.discovery
13    - attack.t1033
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection_img:
19        - Image|endswith: '\whoami.exe'
20        - OriginalFileName: 'whoami.exe'
21    selection_cli:
22        CommandLine|contains:
23            - ' /priv'
24            - ' -priv'
25    condition: all of selection_*
26falsepositives:
27    - Unknown
28level: high

References

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