Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
44 lines
1.3 KiB
YAML
44 lines
1.3 KiB
YAML
title: PUA - NirCmd Execution
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id: 4e2ed651-1906-4a59-a78a-18220fca1b22
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status: test
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description: Detects the use of NirCmd tool for command execution, which could be the result of legitimate administrative activity
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references:
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- https://www.nirsoft.net/utils/nircmd.html
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- https://www.winhelponline.com/blog/run-program-as-system-localsystem-account-windows/
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- https://www.nirsoft.net/utils/nircmd2.html#using
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author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
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date: 2022-01-24
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modified: 2023-02-13
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tags:
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- attack.execution
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- attack.t1569.002
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- attack.s0029
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logsource:
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category: process_creation
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product: windows
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detection:
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selection_org:
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- Image|endswith: '\NirCmd.exe'
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- OriginalFileName: 'NirCmd.exe'
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selection_cmd:
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CommandLine|contains:
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- ' execmd '
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- '.exe script '
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- '.exe shexec '
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- ' runinteractive '
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combo_exec:
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CommandLine|contains:
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- ' exec '
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- ' exec2 '
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combo_exec_params:
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CommandLine|contains:
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- ' show '
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- ' hide '
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condition: 1 of selection_* or all of combo_*
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fields:
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- CommandLine
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- ParentCommandLine
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falsepositives:
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- Legitimate use by administrators
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level: medium
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