itiB
43 lines
1.1 KiB
YAML
43 lines
1.1 KiB
YAML
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title: Hiding Files with Attrib.exe
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ruletype: Sigma
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author: Sami Ruohonen
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date: 2019/01/16
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description: Detects usage of attrib.exe to hide files from users.
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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: '*\attrib.exe'
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SELECTION_3:
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CommandLine: '* +h *'
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SELECTION_4:
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CommandLine: '*\desktop.ini *'
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SELECTION_5:
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ParentImage: '*\cmd.exe'
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SELECTION_6:
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CommandLine: +R +H +S +A \\*.cui
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SELECTION_7:
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ParentCommandLine: C:\WINDOWS\system32\\*.bat
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condition: (SELECTION_1 and (SELECTION_2 and SELECTION_3) and not ((SELECTION_4
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or (SELECTION_5 and SELECTION_6 and SELECTION_7))))
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falsepositives:
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- igfxCUIService.exe hiding *.cui files via .bat script (attrib.exe a child of cmd.exe
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and igfxCUIService.exe is the parent of the cmd.exe)
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- msiexec.exe hiding desktop.ini
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fields:
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- CommandLine
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- ParentCommandLine
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- User
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id: 4281cb20-2994-4580-aa63-c8b86d019934
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level: low
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logsource:
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category: process_creation
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product: windows
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modified: 2021/11/27
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status: test
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tags:
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- attack.defense_evasion
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- attack.t1564.001
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- attack.t1158
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