mirror of
https://github.com/LOLBAS-Project/LOLBAS
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41 lines
2.4 KiB
YAML
41 lines
2.4 KiB
YAML
---
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Name: mofcomp.exe
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Description: Compiler that parses a file containing MOF statements and adds the classes and class instances defined in the file to the WMI repository. Threat actors can leverage this binary to install malicious MOF scripts
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Author: Daniel Gott
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Created: 2022-07-19
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Commands:
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- Command: mofcomp.exe C:\Windows\SERVIC~1\MSSQL$~1\AppData\Local\Temp\xitmf
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Description: Abuse of mofcomp.exe to parse a file which contains MOF statements in order create new classes as part of the WMI repository
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Usecase: Threat actors can use mofcomp.exe to decompile a BMOF binary and then register a malicious class in the WMI repository
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Category: Execution and Persistence
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Privileges: User
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MitreID: T1047
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11 & Windows Server 2008 and above
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- Command: mofcomp.exe C:\Programdata\x.mof
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Description: Abuse of mofcomp.exe to parse a file which contains MOF statements in order create new classes as part of the WMI repository
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Usecase: Threat actors can use mofcomp.exe to decompile a BMOF binary and then register a malicious class in the WMI repository
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Category: Execution and Persistence
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Privileges: User
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MitreID: T1047
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11 & Windows Server 2008 and above
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Full_Path:
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- Path: C:\Windows\System32\wbem\mofcomp.exe
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- Path: C:\Windows\SysWOW64\wbem\mofcomp.exe
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Detection:
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- IOC: strange parent processes spawning mofcomp.exe like cmd.exe or powershell.exe
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- Sigma: https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_susp_mofcomp_execution.yml
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- Sigma: https://github.com/The-DFIR-Report/Sigma-Rules/blob/75260568a7ffe61b2458ca05f6f25914efb44337/win_mofcomp_execution.yml
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Resources:
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- Link: https://docs.microsoft.com/en-us/windows/win32/wmisdk/mofcomp
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- Link: https://docs.microsoft.com/en-us/windows/win32/wmisdk/managed-object-format--mof-
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- Link: https://thedfirreport.com/2022/07/11/select-xmrig-from-sqlserver/
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- Link: https://in.security/2019/04/03/an-intro-into-abusing-and-identifying-wmi-event-subscriptions-for-persistence/
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- Link: https://medium.com/threatpunter/detecting-removing-wmi-persistence-60ccbb7dff96
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Acknowledgement:
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- Person: Daniel Gott
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Handle: '@gott_cyber'
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- Person: The DFIR Report
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Handle: '@TheDFIRReport'
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- Person: Nasreddine Bencherchali
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Handle: '@nas_bench'
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