47 lines
1.8 KiB
YAML
47 lines
1.8 KiB
YAML
title: Suspicious Rundll32 Setupapi.dll Activity
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author: Konstantin Grishchenko, oscd.community
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date: 2020/10/07
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description: setupapi.dll library provide InstallHinfSection function for processing
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INF files. INF file may contain instructions allowing to create values in the
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registry, modify files and install drivers. This technique could be used to obtain
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persistence via modifying one of Run or RunOnce registry keys, run process or
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use other DLLs chain calls (see references) InstallHinfSection function in setupapi.dll
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calls runonce.exe executable regardless of actual content of INF file.
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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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Image: '*\runonce.exe'
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SELECTION_3:
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ParentImage: '*\rundll32.exe'
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SELECTION_4:
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ParentCommandLine: '*setupapi.dll*'
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SELECTION_5:
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ParentCommandLine: '*InstallHinfSection*'
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condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4 and SELECTION_5)
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falsepositives:
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- Scripts and administrative tools that use INF files for driver installation with
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setupapi.dll
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fields:
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- ComputerName
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- User
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- CommandLine
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- ParentCommandLine
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id: 285b85b1-a555-4095-8652-a8a4106af63f
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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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references:
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- https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSLibraries/Setupapi.yml
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- https://gist.githubusercontent.com/bohops/0cc6586f205f3691e04a1ebf1806aabd/raw/baf7b29891bb91e76198e30889fbf7d6642e8974/calc_exe.inf
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- https://raw.githubusercontent.com/huntresslabs/evading-autoruns/master/shady.inf
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- https://twitter.com/Z3Jpa29z/status/1313742350292746241?s=20
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1218.011
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yml_filename: win_susp_rundll32_setupapi_installhinfsection.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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