{"id":"5e3cc4d8-3e68-43db-8656-eaaeefdec9cc","title":"Suspicious Invoke-WebRequest Execution","description":"Detects a suspicious call to Invoke-WebRequest cmdlet where the and output is located in a suspicious location","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2022-08-02","modified":"2025-07-18","tags":["attack.command-and-control","attack.t1105"],"technique_ids":["T1105"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.sentinelone.com/blog/living-off-windows-defender-lockbit-ransomware-sideloads-cobalt-strike-through-microsoft-security-tool/"],"source_path":"rules/windows/process_creation/proc_creation_win_powershell_invoke_webrequest_download.yml","source_sha256":"0c9f9c712230b6c9ca0bc166b01d9475c6669f51ed0fd1717fadf2884f0f99bd","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_powershell_invoke_webrequest_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: Suspicious Invoke-WebRequest Execution\nid: 5e3cc4d8-3e68-43db-8656-eaaeefdec9cc\nrelated:\n    - id: e218595b-bbe7-4ee5-8a96-f32a24ad3468\n      type: derived\nstatus: test\ndescription: Detects a suspicious call to Invoke-WebRequest cmdlet where the and output is located in a suspicious location\nreferences:\n    - https://www.sentinelone.com/blog/living-off-windows-defender-lockbit-ransomware-sideloads-cobalt-strike-through-microsoft-security-tool/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-08-02\nmodified: 2025-07-18\ntags:\n    - attack.command-and-control\n    - attack.t1105\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith:\n              - '\\powershell_ise.exe'\n              - '\\powershell.exe'\n              - '\\pwsh.exe'\n        - OriginalFileName:\n              - 'powershell_ise.EXE'\n              - 'PowerShell.EXE'\n              - 'pwsh.dll'\n    selection_commands:\n        CommandLine|contains:\n            # These are all aliases of Invoke-WebRequest\n            - 'curl '\n            - 'Invoke-WebRequest'\n            - 'iwr '\n            - 'wget '\n    selection_flags:\n        CommandLine|contains:\n            - ' -ur'\n            - ' -o'\n    selection_susp_locations:\n        CommandLine|contains:\n            - '\\AppData\\'\n            - '\\Desktop\\'\n            - '\\Temp\\'\n            - '\\Users\\Public\\'\n            - '%AppData%'\n            - '%Public%'\n            - '%Temp%'\n            - '%tmp%'\n            - ':\\Windows\\'\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1105","id":"T1105","name":"Ingress Tool Transfer","page":"techniques/enterprise/T1105/"}],"data_path":"data/detection-rules/5e3cc4d8-3e68-43db-8656-eaaeefdec9cc.json","kind":"sigma"}