48 lines
1.2 KiB
YAML
48 lines
1.2 KiB
YAML
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title: Whoami Execution Anomaly
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ruletype: Sigma
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author: Florian Roth
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date: 2021/08/12
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description: Detects the execution of whoami with suspicious parents or parameters
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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Image: '*\whoami.exe'
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SELECTION_3:
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ParentImage:
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- '*\cmd.exe'
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- '*\powershell.exe'
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SELECTION_4:
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ParentImage:
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- C:\Program Files\Microsoft Monitoring Agent\Agent\MonitoringHost.exe
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- ''
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SELECTION_5:
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ParentImage|re: ^$
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SELECTION_6:
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CommandLine:
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- '*whoami -all*'
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- '*whoami /all*'
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- '*whoami.exe -all*'
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- '*whoami.exe /all*'
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condition: (SELECTION_1 and ((((SELECTION_2 and not (SELECTION_3)) and not (SELECTION_4))
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and not (SELECTION_5)) or SELECTION_6))
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falsepositives:
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- Admin activity
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- Scripts and administrative tools used in the monitored environment
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- Monitoring activity
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id: 8de1cbe8-d6f5-496d-8237-5f44a721c7a0
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level: high
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logsource:
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category: process_creation
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product: windows
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modified: 2021/08/26
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references:
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- https://brica.de/alerts/alert/public/1247926/agent-tesla-keylogger-delivered-inside-a-power-iso-daa-archive/
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- https://app.any.run/tasks/7eaba74e-c1ea-400f-9c17-5e30eee89906/
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status: experimental
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tags:
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- attack.discovery
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- attack.t1033
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- car.2016-03-001
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