{"id":"52d097e2-063e-4c9c-8fbb-855c8948d135","title":"Suspicious Windows Update Agent Empty Cmdline","description":"Detects suspicious Windows Update Agent activity in which a wuauclt.exe process command line doesn't contain any command line flags\n","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-02-26","modified":"2023-11-11","tags":["attack.stealth","attack.t1036"],"technique_ids":["T1036"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://redcanary.com/blog/blackbyte-ransomware/"],"source_path":"rules/windows/process_creation/proc_creation_win_wuauclt_no_cli_flags_execution.yml","source_sha256":"c0b388ad4c104d12647e53c9801e5de6bfeb144b3863342b063db09a4659e9dd","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_wuauclt_no_cli_flags_execution.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Windows Update Agent Empty Cmdline\nid: 52d097e2-063e-4c9c-8fbb-855c8948d135\nstatus: test\ndescription: |\n    Detects suspicious Windows Update Agent activity in which a wuauclt.exe process command line doesn't contain any command line flags\nreferences:\n    - https://redcanary.com/blog/blackbyte-ransomware/\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-02-26\nmodified: 2023-11-11\ntags:\n    - attack.stealth\n    - attack.t1036\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|endswith:\n            - 'Wuauclt'\n            - 'Wuauclt.exe'\n    condition: all of selection*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1036","id":"T1036","name":"Masquerading","page":"techniques/enterprise/T1036/"}],"data_path":"data/detection-rules/52d097e2-063e-4c9c-8fbb-855c8948d135.json","kind":"sigma"}