{"id":"a9e416a8-e613-4f8b-88b8-a7d1d1af2f61","title":"Suspicious Use of CSharp Interactive Console","description":"Detects the execution of CSharp interactive console by PowerShell","author":"Michael R. (@nahamike01)","status":"test","level":"high","date":"2020-03-08","modified":"2022-07-14","tags":["attack.execution","attack.stealth","attack.t1127"],"technique_ids":["T1127"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Possible depending on environment. Pair with other factors such as net connections, command-line args, etc."],"references":["https://redcanary.com/blog/detecting-attacks-leveraging-the-net-framework/"],"source_path":"rules/windows/process_creation/proc_creation_win_csi_use_of_csharp_console.yml","source_sha256":"d012aedb0d4066fc76cd1c118e3e380f73de9db197e0e74ea7e7e6819eaadb6b","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_csi_use_of_csharp_console.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 Use of CSharp Interactive Console\nid: a9e416a8-e613-4f8b-88b8-a7d1d1af2f61\nstatus: test\ndescription: Detects the execution of CSharp interactive console by PowerShell\nreferences:\n    - https://redcanary.com/blog/detecting-attacks-leveraging-the-net-framework/\nauthor: Michael R. (@nahamike01)\ndate: 2020-03-08\nmodified: 2022-07-14\ntags:\n    - attack.execution\n    - attack.stealth\n    - attack.t1127\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        Image|endswith: '\\csi.exe'\n        ParentImage|endswith:\n            - '\\powershell.exe'\n            - '\\pwsh.exe'\n            - '\\powershell_ise.exe'\n        OriginalFileName: 'csi.exe'\n    condition: selection\nfalsepositives:\n    - Possible depending on environment. Pair with other factors such as net connections, command-line args, etc.\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1127","id":"T1127","name":"Trusted Developer Utilities Proxy Execution","page":"techniques/enterprise/T1127/"}],"data_path":"data/detection-rules/a9e416a8-e613-4f8b-88b8-a7d1d1af2f61.json","kind":"sigma"}