itiB
43 lines
1.1 KiB
YAML
43 lines
1.1 KiB
YAML
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title: Suspicious Desktopimgdownldr Command
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ruletype: Sigma
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author: Florian Roth
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date: 2020/07/03
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description: Detects a suspicious Microsoft desktopimgdownldr execution with parameters
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used to download files from the Internet
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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: '* /lockscreenurl:*'
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SELECTION_3:
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CommandLine:
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- '*.jpg*'
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- '*.jpeg*'
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- '*.png*'
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SELECTION_4:
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CommandLine: '*reg delete*'
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SELECTION_5:
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CommandLine: '*\PersonalizationCSP*'
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condition: (SELECTION_1 and ((SELECTION_2 and not (SELECTION_3)) or (SELECTION_4
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and SELECTION_5)))
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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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fields:
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- CommandLine
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- ParentCommandLine
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id: bb58aa4a-b80b-415a-a2c0-2f65a4c81009
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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: 2021/11/27
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references:
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- https://labs.sentinelone.com/living-off-windows-land-a-new-native-file-downldr/
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- https://twitter.com/SBousseaden/status/1278977301745741825
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status: test
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tags:
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- attack.command_and_control
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- attack.t1105
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