45 lines
1.4 KiB
YAML
45 lines
1.4 KiB
YAML
title: Suspect Svchost Activity
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author: David Burkett
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date: 2019/12/28
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description: It is extremely abnormal for svchost.exe to spawn without any CLI arguments
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and is normally observed when a malicious process spawns the process and injects
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code into the process memory space.
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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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EventID: 1
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SELECTION_3:
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CommandLine: '*svchost.exe'
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SELECTION_4:
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Image: '*\svchost.exe'
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SELECTION_5:
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ParentImage: '*\rpcnet.exe'
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SELECTION_6:
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ParentImage: '*\rpcnetp.exe'
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SELECTION_7:
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CommandLine|re: ^$
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condition: (SELECTION_1 and (SELECTION_2 and SELECTION_3 and SELECTION_4) and not
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((SELECTION_5 or SELECTION_6) or SELECTION_7))
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falsepositives:
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- rpcnet.exe / rpcnetp.exe which is a lojack style software. https://www.blackhat.com/docs/us-14/materials/us-14-Kamlyuk-Kamluk-Computrace-Backdoor-Revisited.pdf
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fields:
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- CommandLine
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- ParentCommandLine
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id: 16c37b52-b141-42a5-a3ea-bbe098444397
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level: critical
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logsource:
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category: process_creation
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product: windows
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modified: 2021/02/24
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references:
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- https://securitybytes.io/blue-team-fundamentals-part-two-windows-processes-759fe15965e2
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.privilege_escalation
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- attack.t1055
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yml_filename: win_susp_svchost_no_cli.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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