{"id":"5947497f-1aa4-41dd-9693-c9848d58727d","title":"Suspicious Unblock-File","description":"Remove the Zone.Identifier alternate data stream which identifies the file as downloaded from the internet.","author":"frack113","status":"test","level":"medium","date":"2022-02-01","modified":"","tags":["attack.defense-impairment","attack.t1553.005"],"technique_ids":["T1553.005"],"logsource":{"product":"windows","category":"ps_script","definition":"Requirements: Script Block Logging must be enabled"},"falsepositives":["Legitimate PowerShell scripts"],"references":["https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1553.005/T1553.005.md#atomic-test-3---remove-the-zoneidentifier-alternate-data-stream","https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/unblock-file?view=powershell-7.2"],"source_path":"rules/windows/powershell/powershell_script/posh_ps_susp_unblock_file.yml","source_sha256":"8d734fe1c41011fa28b4c8be6bd62f383c88312a64ca228702b6b63928e5d197","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/powershell/powershell_script/posh_ps_susp_unblock_file.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 Unblock-File\nid: 5947497f-1aa4-41dd-9693-c9848d58727d\nstatus: test\ndescription: Remove the Zone.Identifier alternate data stream which identifies the file as downloaded from the internet.\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1553.005/T1553.005.md#atomic-test-3---remove-the-zoneidentifier-alternate-data-stream\n    - https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/unblock-file?view=powershell-7.2\nauthor: frack113\ndate: 2022-02-01\ntags:\n    - attack.defense-impairment\n    - attack.t1553.005\nlogsource:\n    product: windows\n    category: ps_script\n    definition: 'Requirements: Script Block Logging must be enabled'\ndetection:\n    selection:\n        ScriptBlockText|contains|all:\n            - 'Unblock-File '\n            - '-Path '\n    condition: selection\nfalsepositives:\n    - Legitimate PowerShell scripts\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1553.005","id":"T1553.005","name":"Mark-of-the-Web Bypass","page":"techniques/enterprise/T1553.005/"}],"data_path":"data/detection-rules/5947497f-1aa4-41dd-9693-c9848d58727d.json","kind":"sigma"}