54 lines
1.7 KiB
YAML
54 lines
1.7 KiB
YAML
title: Suspicious Encoded Scripts in a WMI Consumer
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author: Florian Roth
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date: 2021/09/01
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description: Detects suspicious encoded payloads 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: '*VGhpcyBwcm9ncmFtIG11c3QgYmUgcnVuIHVuZGVyIFdpbjMy*'
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SELECTION_11:
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Destination: '*RoaXMgcHJvZ3JhbSBtdXN0IGJlIHJ1biB1bmRlciBXaW4zM*'
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SELECTION_12:
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Destination: '*UaGlzIHByb2dyYW0gbXVzdCBiZSBydW4gdW5kZXIgV2luMz*'
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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: '*V3JpdGVQcm9jZXNzTWVtb3J5*'
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SELECTION_5:
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Destination: '*dyaXRlUHJvY2Vzc01lbW9ye*'
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SELECTION_6:
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Destination: '*Xcml0ZVByb2Nlc3NNZW1vcn*'
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SELECTION_7:
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Destination: '*VGhpcyBwcm9ncmFtIGNhbm5vdCBiZSBydW4gaW4gRE9TIG1vZG*'
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SELECTION_8:
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Destination: '*RoaXMgcHJvZ3JhbSBjYW5ub3QgYmUgcnVuIGluIERPUyBtb2Rl*'
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SELECTION_9:
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Destination: '*UaGlzIHByb2dyYW0gY2Fubm90IGJlIHJ1biBpbiBET1MgbW9kZ*'
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condition: ((SELECTION_1 or SELECTION_2 or SELECTION_3) and (SELECTION_4 or SELECTION_5
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or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9 or SELECTION_10
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or SELECTION_11 or SELECTION_12))
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falsepositives:
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- Unknown
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fields:
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- User
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- Operation
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id: 83844185-1c5b-45bc-bcf3-b5bf3084ca5b
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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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references:
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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.execution
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- attack.t1047
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- attack.persistence
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- attack.t1546.003
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yml_filename: sysmon_wmi_susp_encoded_scripts.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/wmi_event
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