61 lines
1.5 KiB
YAML
61 lines
1.5 KiB
YAML
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title: Suspicious Scripting in a WMI Consumer
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author: Florian Roth, Jonhnathan Ribeiro
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date: 2019/04/15
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description: Detects suspicious scripting in WMI Event Consumers
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detection:
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SELECTION_1:
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EventID: 19
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SELECTION_10:
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Destination:
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- '* iex(*'
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- '*WScript.shell*'
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- '* -nop *'
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- '* -noprofile *'
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- '* -decode *'
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- '* -enc *'
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SELECTION_11:
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Destination:
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- '*WScript.Shell*'
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- '*System.Security.Cryptography.FromBase64Transform*'
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SELECTION_2:
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EventID: 20
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SELECTION_3:
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EventID: 21
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SELECTION_4:
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Destination: '*new-object*'
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SELECTION_5:
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Destination: '*net.webclient*'
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SELECTION_6:
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Destination: '*.downloadstring*'
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SELECTION_7:
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Destination: '*new-object*'
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SELECTION_8:
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Destination: '*net.webclient*'
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SELECTION_9:
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Destination: '*.downloadfile*'
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condition: ((SELECTION_1 or SELECTION_2 or SELECTION_3) and ((SELECTION_4 and SELECTION_5
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and SELECTION_6) or (SELECTION_7 and SELECTION_8 and SELECTION_9) or SELECTION_10
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or SELECTION_11))
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falsepositives:
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- Administrative scripts
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fields:
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- User
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- Operation
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id: fe21810c-2a8c-478f-8dd3-5a287fb2a0e0
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level: high
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logsource:
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category: wmi_event
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product: windows
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modified: 2021/09/01
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references:
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- https://in.security/an-intro-into-abusing-and-identifying-wmi-event-subscriptions-for-persistence/
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- https://github.com/Neo23x0/signature-base/blob/master/yara/gen_susp_lnk_files.yar#L19
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- https://github.com/RiccardoAncarani/LiquidSnake
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status: experimental
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tags:
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- attack.t1086
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- attack.execution
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- attack.t1059.005
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ruletype: SIGMA
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