{"id":"3b6ab547-8ec2-4991-b9d2-2b06702a48d7","title":"PowerShell Download Pattern","description":"Detects a Powershell process that contains download commands in its command line string","author":"Florian Roth (Nextron Systems), oscd.community, Jonhnathan Ribeiro","status":"test","level":"medium","date":"2019-01-16","modified":"2025-10-20","tags":["attack.execution","attack.t1059.001"],"technique_ids":["T1059.001"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://blog.redteam.pl/2020/06/black-kingdom-ransomware.html","https://lab52.io/blog/winter-vivern-all-summer/","https://hatching.io/blog/powershell-analysis/"],"source_path":"rules/windows/process_creation/proc_creation_win_powershell_download_patterns.yml","source_sha256":"58cdce2b40b1312aebfffdc7fcece5f4a71f9d7e9569a9fa7f5dc9ecdb6d1aa3","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_powershell_download_patterns.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: PowerShell Download Pattern\nid: 3b6ab547-8ec2-4991-b9d2-2b06702a48d7\nrelated:\n    - id: e6c54d94-498c-4562-a37c-b469d8e9a275\n      type: derived\n    - id: 8f70ac5f-1f6f-4f8e-b454-db19561216c5\n      type: obsolete\nstatus: test\ndescription: Detects a Powershell process that contains download commands in its command line string\nreferences:\n    - https://blog.redteam.pl/2020/06/black-kingdom-ransomware.html\n    - https://lab52.io/blog/winter-vivern-all-summer/\n    - https://hatching.io/blog/powershell-analysis/\nauthor: Florian Roth (Nextron Systems), oscd.community, Jonhnathan Ribeiro\ndate: 2019-01-16\nmodified: 2025-10-20\ntags:\n    - attack.execution\n    - attack.t1059.001\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_cli:\n        CommandLine|contains|all:\n            - 'new-object'\n            - 'net.webclient).'\n            - 'download'\n        CommandLine|contains:\n            - 'string('\n            - 'file('\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1059.001","id":"T1059.001","name":"PowerShell","page":"techniques/enterprise/T1059.001/"}],"data_path":"data/detection-rules/3b6ab547-8ec2-4991-b9d2-2b06702a48d7.json","kind":"sigma"}