{"id":"e290b10b-1023-4452-a4a9-eb31a9013b3a","title":"LOLBAS Data Exfiltration by DataSvcUtil.exe","description":"Detects when a user performs data exfiltration by using DataSvcUtil.exe","author":"Ialle Teixeira @teixeira0xfffff, Austin Songer @austinsonger","status":"test","level":"medium","date":"2021-09-30","modified":"2022-05-16","tags":["attack.exfiltration","attack.t1567"],"technique_ids":["T1567"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["DataSvcUtil.exe being used may be performed by a system administrator.","Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.","DataSvcUtil.exe being executed from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule."],"references":["https://gist.github.com/teixeira0xfffff/837e5bfed0d1b0a29a7cb1e5dbdd9ca6","https://learn.microsoft.com/en-us/previous-versions/dotnet/framework/data/wcf/wcf-data-service-client-utility-datasvcutil-exe","https://learn.microsoft.com/en-us/previous-versions/dotnet/framework/data/wcf/generating-the-data-service-client-library-wcf-data-services","https://learn.microsoft.com/en-us/previous-versions/dotnet/framework/data/wcf/how-to-add-a-data-service-reference-wcf-data-services","https://lolbas-project.github.io/lolbas/Binaries/DataSvcUtil/"],"source_path":"rules/windows/process_creation/proc_creation_win_lolbin_data_exfiltration_by_using_datasvcutil.yml","source_sha256":"ea2e8a2517bc86b8c6720d6dec61a464e3ec69c82b35284c8664910198d8878c","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_lolbin_data_exfiltration_by_using_datasvcutil.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: LOLBAS Data Exfiltration by DataSvcUtil.exe\nid: e290b10b-1023-4452-a4a9-eb31a9013b3a\nstatus: test\ndescription: Detects when a user performs data exfiltration by using DataSvcUtil.exe\nreferences:\n    - https://gist.github.com/teixeira0xfffff/837e5bfed0d1b0a29a7cb1e5dbdd9ca6\n    - https://learn.microsoft.com/en-us/previous-versions/dotnet/framework/data/wcf/wcf-data-service-client-utility-datasvcutil-exe\n    - https://learn.microsoft.com/en-us/previous-versions/dotnet/framework/data/wcf/generating-the-data-service-client-library-wcf-data-services\n    - https://learn.microsoft.com/en-us/previous-versions/dotnet/framework/data/wcf/how-to-add-a-data-service-reference-wcf-data-services\n    - https://lolbas-project.github.io/lolbas/Binaries/DataSvcUtil/\nauthor: Ialle Teixeira @teixeira0xfffff, Austin Songer @austinsonger\ndate: 2021-09-30\nmodified: 2022-05-16\ntags:\n    - attack.exfiltration\n    - attack.t1567\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_cli:\n        CommandLine|contains:\n            - '/in:'\n            - '/out:'\n            - '/uri:'\n    selection_img:\n        - Image|endswith: '\\DataSvcUtil.exe'\n        - OriginalFileName: 'DataSvcUtil.exe'\n    condition: all of selection*\nfalsepositives:\n    - DataSvcUtil.exe being used may be performed by a system administrator.\n    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.\n    - DataSvcUtil.exe being executed from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1567","id":"T1567","name":"Exfiltration Over Web Service","page":"techniques/enterprise/T1567/"}],"data_path":"data/detection-rules/e290b10b-1023-4452-a4a9-eb31a9013b3a.json","kind":"sigma"}