{"id":"75edd216-1939-4c73-8d61-7f3a0d85b5cc","title":"File Download Via InstallUtil.EXE","description":"Detects use of .NET InstallUtil.exe in order to download arbitrary files. The files will be written to \"%LOCALAPPDATA%\\Microsoft\\Windows\\INetCache\\IE\\\"\n","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2022-08-19","modified":"2023-11-09","tags":["attack.stealth","attack.t1218"],"technique_ids":["T1218"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://github.com/LOLBAS-Project/LOLBAS/pull/239"],"source_path":"rules/windows/process_creation/proc_creation_win_installutil_download.yml","source_sha256":"6b135c99e6f688122558d40af7a4a5f28afcb993f3c15c918b96154fbd83fd02","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_installutil_download.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: File Download Via InstallUtil.EXE\nid: 75edd216-1939-4c73-8d61-7f3a0d85b5cc\nstatus: test\ndescription: |\n    Detects use of .NET InstallUtil.exe in order to download arbitrary files. The files will be written to \"%LOCALAPPDATA%\\Microsoft\\Windows\\INetCache\\IE\\\"\nreferences:\n    - https://github.com/LOLBAS-Project/LOLBAS/pull/239\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-08-19\nmodified: 2023-11-09\ntags:\n    - attack.stealth\n    - attack.t1218\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith: '\\InstallUtil.exe'\n        - OriginalFileName: 'InstallUtil.exe'\n    selection_cli:\n        CommandLine|contains:\n            - 'ftp://'\n            - 'http://'\n            - 'https://'\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: medium\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/75edd216-1939-4c73-8d61-7f3a0d85b5cc.json","kind":"sigma"}