37 lines
1.2 KiB
YAML
37 lines
1.2 KiB
YAML
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title: Suspicious Copy From or To System32
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ruletype: Sigma
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author: Florian Roth, Markus Neis, Tim Shelton (HAWK.IO)
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date: 2020/07/03
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description: Detects a suspicious copy command that copies a system program from System32
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to another directory on disk - sometimes used to use LOLBINs like certutil or desktopimgdownldr
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to a different location with a different name
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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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CommandLine:
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- '*xcopy*\System32\\*'
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- '*cmd.exe*/c*copy*\System32\\*'
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condition: (SELECTION_1 and SELECTION_2)
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falsepositives:
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- False positives depend on scripts and administrative tools used in the monitored
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environment
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- Admin scripts like https://www.itexperience.net/sccm-batch-files-and-32-bits-processes-on-64-bits-os/
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- False positive when cmd.exe and xcopy.exe are called directly
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fields:
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- CommandLine
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- ParentCommandLine
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id: fff9d2b7-e11c-4a69-93d3-40ef66189767
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level: medium
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logsource:
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category: process_creation
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product: windows
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modified: 2021/12/30
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references:
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- https://www.hybrid-analysis.com/sample/8da5b75b6380a41eee3a399c43dfe0d99eeefaa1fd21027a07b1ecaa4cd96fdd?environmentId=120
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status: test
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tags:
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- attack.defense_evasion
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- attack.t1036.003
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