{"id":"af77cf95-c469-471c-b6a0-946c685c4798","title":"Proxy Execution Via Wuauclt.EXE","description":"Detects the use of the Windows Update Client binary (wuauclt.exe) for proxy execution.","author":"Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), Florian Roth (Nextron Systems), Sreeman, FPT.EagleEye Team","status":"test","level":"high","date":"2020-10-12","modified":"2023-11-11","tags":["attack.stealth","attack.t1218","attack.execution"],"technique_ids":["T1218"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://dtm.uk/wuauclt/","https://blog.malwarebytes.com/threat-intelligence/2022/01/north-koreas-lazarus-apt-leverages-windows-update-client-github-in-latest-campaign/"],"source_path":"rules/windows/process_creation/proc_creation_win_wuauclt_dll_loading.yml","source_sha256":"d50f5048c54d3b1aa040a89233e6adb6c6a7ca849850ea6564329f1ce1eec1c8","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_wuauclt_dll_loading.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Proxy Execution Via Wuauclt.EXE\nid: af77cf95-c469-471c-b6a0-946c685c4798\nrelated:\n    - id: ba1bb0cb-73da-42de-ad3a-de10c643a5d0\n      type: obsolete\n    - id: d7825193-b70a-48a4-b992-8b5b3015cc11\n      type: obsolete\nstatus: test\ndescription: Detects the use of the Windows Update Client binary (wuauclt.exe) for proxy execution.\nreferences:\n    - https://dtm.uk/wuauclt/\n    - https://blog.malwarebytes.com/threat-intelligence/2022/01/north-koreas-lazarus-apt-leverages-windows-update-client-github-in-latest-campaign/\nauthor: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), Florian Roth (Nextron Systems), Sreeman, FPT.EagleEye Team\ndate: 2020-10-12\nmodified: 2023-11-11\ntags:\n    - attack.stealth\n    - attack.t1218\n    - attack.execution\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith: '\\wuauclt.exe'\n        - OriginalFileName: 'wuauclt.exe'\n    selection_cli:\n        CommandLine|contains|all:\n            - 'UpdateDeploymentProvider'\n            - 'RunHandlerComServer'\n    filter_main_generic:\n        # Note: Please enhance this if you find the full path\n        CommandLine|contains: ' /UpdateDeploymentProvider UpdateDeploymentProvider.dll '\n    filter_main_wuaueng:\n        # Note: Please enhance this if you find the full path\n        CommandLine|contains: ' wuaueng.dll '\n    filter_main_uus:\n        CommandLine|contains:\n            - ':\\Windows\\UUS\\Packages\\Preview\\amd64\\updatedeploy.dll /ClassId'\n            - ':\\Windows\\UUS\\amd64\\UpdateDeploy.dll /ClassId'\n    filter_main_winsxs:\n        CommandLine|contains|all:\n            - ':\\Windows\\WinSxS\\'\n            - '\\UpdateDeploy.dll /ClassId '\n    condition: all of selection_* and not 1 of filter_main_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1218","id":"T1218","name":"System Binary Proxy Execution","page":"techniques/enterprise/T1218/"}],"data_path":"data/detection-rules/af77cf95-c469-471c-b6a0-946c685c4798.json","kind":"sigma"}