{"id":"6812a10b-60ea-420c-832f-dfcc33b646ba","title":"Potential PowerShell Execution Via DLL","description":"Detects potential PowerShell execution from a DLL instead of the usual PowerShell process as seen used in PowerShdll.\nThis detection assumes that PowerShell commands are passed via the CommandLine.\n","author":"Markus Neis, Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2018-08-25","modified":"2024-03-07","tags":["attack.stealth","attack.t1218.011"],"technique_ids":["T1218.011"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://github.com/p3nt4/PowerShdll/blob/62cfa172fb4e1f7f4ac00ca942685baeb88ff356/README.md"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_powershell_execution_via_dll.yml","source_sha256":"9488799add24f4310f5bf4b72c4479216ad343a0fec79fa0e61ed71545da04f2","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_powershell_execution_via_dll.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential PowerShell Execution Via DLL\nid: 6812a10b-60ea-420c-832f-dfcc33b646ba\nstatus: test\ndescription: |\n    Detects potential PowerShell execution from a DLL instead of the usual PowerShell process as seen used in PowerShdll.\n    This detection assumes that PowerShell commands are passed via the CommandLine.\nreferences:\n    - https://github.com/p3nt4/PowerShdll/blob/62cfa172fb4e1f7f4ac00ca942685baeb88ff356/README.md\nauthor: Markus Neis, Nasreddine Bencherchali (Nextron Systems)\ndate: 2018-08-25\nmodified: 2024-03-07\ntags:\n    - attack.stealth\n    - attack.t1218.011\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith:\n              - '\\InstallUtil.exe'\n              - '\\RegAsm.exe'\n              - '\\RegSvcs.exe'\n              - '\\regsvr32.exe'\n              - '\\rundll32.exe'\n        - OriginalFileName:\n              - 'InstallUtil.exe'\n              - 'RegAsm.exe'\n              - 'RegSvcs.exe'\n              - 'REGSVR32.EXE'\n              - 'RUNDLL32.EXE'\n    selection_cli:\n        CommandLine|contains:\n            - 'Default.GetString'\n            - 'DownloadString'\n            - 'FromBase64String'\n            - 'ICM '\n            - 'IEX '\n            - 'Invoke-Command'\n            - 'Invoke-Expression'\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1218.011","id":"T1218.011","name":"Rundll32","page":"techniques/enterprise/T1218.011/"}],"data_path":"data/detection-rules/6812a10b-60ea-420c-832f-dfcc33b646ba.json","kind":"sigma"}