{"id":"1ec65a5f-9473-4f12-97da-622044d6df21","title":"Powershell Defender Disable Scan Feature","description":"Detects requests to disable Microsoft Defender features using PowerShell commands","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-03-03","modified":"2024-01-02","tags":["attack.defense-impairment","attack.t1685"],"technique_ids":["T1685"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Possible administrative activity","Other Cmdlets that may use the same parameters"],"references":["https://learn.microsoft.com/en-us/powershell/module/defender/set-mppreference?view=windowsserver2022-ps","https://www.virustotal.com/gui/file/d609799091731d83d75ec5d1f030571af20c45efeeb94840b67ea09a3283ab65/behavior/C2AE","https://www.virustotal.com/gui/search/content%253A%2522Set-MpPreference%2520-Disable%2522/files"],"source_path":"rules/windows/process_creation/proc_creation_win_powershell_defender_disable_feature.yml","source_sha256":"80b8041fa2117d205c851721f03e1f744b1dba94ff9e3d7b11dbdb850530076f","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_powershell_defender_disable_feature.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 Defender Disable Scan Feature\nid: 1ec65a5f-9473-4f12-97da-622044d6df21\nstatus: test\ndescription: Detects requests to disable Microsoft Defender features using PowerShell commands\nreferences:\n    - https://learn.microsoft.com/en-us/powershell/module/defender/set-mppreference?view=windowsserver2022-ps\n    - https://www.virustotal.com/gui/file/d609799091731d83d75ec5d1f030571af20c45efeeb94840b67ea09a3283ab65/behavior/C2AE\n    - https://www.virustotal.com/gui/search/content%253A%2522Set-MpPreference%2520-Disable%2522/files\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-03-03\nmodified: 2024-01-02\ntags:\n    - attack.defense-impairment\n    - attack.t1685\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_cli_cmdlet:\n        CommandLine|contains:\n            - 'Add-MpPreference '\n            - 'Set-MpPreference '\n    selection_cli_option:\n        CommandLine|contains:\n            - 'DisableArchiveScanning '\n            - 'DisableRealtimeMonitoring '\n            - 'DisableIOAVProtection '\n            - 'DisableBehaviorMonitoring '\n            - 'DisableBlockAtFirstSeen '\n            - 'DisableCatchupFullScan '\n            - 'DisableCatchupQuickScan '\n    selection_cli_value:\n        CommandLine|contains:\n            - '$true'\n            - ' 1 '\n    selection_encoded_modifier:\n        CommandLine|base64offset|contains:\n            # Note: Since this is calculating offsets casing is important\n            - 'disablearchivescanning '\n            - 'DisableArchiveScanning '\n            - 'disablebehaviormonitoring '\n            - 'DisableBehaviorMonitoring '\n            - 'disableblockatfirstseen '\n            - 'DisableBlockAtFirstSeen '\n            - 'disablecatchupfullscan '\n            - 'DisableCatchupFullScan '\n            - 'disablecatchupquickscan '\n            - 'DisableCatchupQuickScan '\n            - 'disableioavprotection '\n            - 'DisableIOAVProtection '\n            - 'disablerealtimemonitoring '\n            - 'DisableRealtimeMonitoring '\n    selection_encoded_direct:\n        CommandLine|contains:\n            - 'RABpAHMAYQBiAGwAZQBSAGUAYQBsAHQAaQBtAGUATQBvAG4AaQB0AG8AcgBpAG4AZwAgA'\n            - 'QAaQBzAGEAYgBsAGUAUgBlAGEAbAB0AGkAbQBlAE0AbwBuAGkAdABvAHIAaQBuAGcAIA'\n            - 'EAGkAcwBhAGIAbABlAFIAZQBhAGwAdABpAG0AZQBNAG8AbgBpAHQAbwByAGkAbgBnACAA'\n            - 'RABpAHMAYQBiAGwAZQBJAE8AQQBWAFAAcgBvAHQAZQBjAHQAaQBvAG4AIA'\n            - 'QAaQBzAGEAYgBsAGUASQBPAEEAVgBQAHIAbwB0AGUAYwB0AGkAbwBuACAA'\n            - 'EAGkAcwBhAGIAbABlAEkATwBBAFYAUAByAG8AdABlAGMAdABpAG8AbgAgA'\n            - 'RABpAHMAYQBiAGwAZQBCAGUAaABhAHYAaQBvAHIATQBvAG4AaQB0AG8AcgBpAG4AZwAgA'\n            - 'QAaQBzAGEAYgBsAGUAQgBlAGgAYQB2AGkAbwByAE0AbwBuAGkAdABvAHIAaQBuAGcAIA'\n            - 'EAGkAcwBhAGIAbABlAEIAZQBoAGEAdgBpAG8AcgBNAG8AbgBpAHQAbwByAGkAbgBnACAA'\n            - 'RABpAHMAYQBiAGwAZQBCAGwAbwBjAGsAQQB0AEYAaQByAHMAdABTAGUAZQBuACAA'\n            - 'QAaQBzAGEAYgBsAGUAQgBsAG8AYwBrAEEAdABGAGkAcgBzAHQAUwBlAGUAbgAgA'\n            - 'EAGkAcwBhAGIAbABlAEIAbABvAGMAawBBAHQARgBpAHIAcwB0AFMAZQBlAG4AIA'\n            - 'ZABpAHMAYQBiAGwAZQByAGUAYQBsAHQAaQBtAGUAbQBvAG4AaQB0AG8AcgBpAG4AZwAgA'\n            - 'QAaQBzAGEAYgBsAGUAcgBlAGEAbAB0AGkAbQBlAG0AbwBuAGkAdABvAHIAaQBuAGcAIA'\n            - 'kAGkAcwBhAGIAbABlAHIAZQBhAGwAdABpAG0AZQBtAG8AbgBpAHQAbwByAGkAbgBnACAA'\n            - 'ZABpAHMAYQBiAGwAZQBpAG8AYQB2AHAAcgBvAHQAZQBjAHQAaQBvAG4AIA'\n            - 'QAaQBzAGEAYgBsAGUAaQBvAGEAdgBwAHIAbwB0AGUAYwB0AGkAbwBuACAA'\n            - 'kAGkAcwBhAGIAbABlAGkAbwBhAHYAcAByAG8AdABlAGMAdABpAG8AbgAgA'\n            - 'ZABpAHMAYQBiAGwAZQBiAGUAaABhAHYAaQBvAHIAbQBvAG4AaQB0AG8AcgBpAG4AZwAgA'\n            - 'QAaQBzAGEAYgBsAGUAYgBlAGgAYQB2AGkAbwByAG0AbwBuAGkAdABvAHIAaQBuAGcAIA'\n            - 'kAGkAcwBhAGIAbABlAGIAZQBoAGEAdgBpAG8AcgBtAG8AbgBpAHQAbwByAGkAbgBnACAA'\n            - 'ZABpAHMAYQBiAGwAZQBiAGwAbwBjAGsAYQB0AGYAaQByAHMAdABzAGUAZQBuACAA'\n            - 'QAaQBzAGEAYgBsAGUAYgBsAG8AYwBrAGEAdABmAGkAcgBzAHQAcwBlAGUAbgAgA'\n            - 'kAGkAcwBhAGIAbABlAGIAbABvAGMAawBhAHQAZgBpAHIAcwB0AHMAZQBlAG4AIA'\n            - 'RABpAHMAYQBiAGwAZQBDAGEAdABjAGgAdQBwAEYAdQBsAGwAUwBjAGEAbgA'\n            - 'RABpAHMAYQBiAGwAZQBDAGEAdABjAGgAdQBwAFEAdQBpAGMAawBTAGMAYQBuAA'\n            - 'RABpAHMAYQBiAGwAZQBBAHIAYwBoAGkAdgBlAFMAYwBhAG4AbgBpAG4AZwA'\n    condition: all of selection_cli_* or 1 of selection_encoded_*\nfalsepositives:\n    - Possible administrative activity\n    - Other Cmdlets that may use the same parameters\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1685","id":"T1685","name":"Disable or Modify Tools","page":"techniques/enterprise/T1685/"}],"data_path":"data/detection-rules/1ec65a5f-9473-4f12-97da-622044d6df21.json","kind":"sigma"}