{"id":"a55349d8-9588-4c5a-8e3b-1925fe2a4ffe","title":"Exchange PowerShell Cmdlet History Deleted","description":"Detects the deletion of the Exchange PowerShell cmdlet History logs which may indicate an attempt to destroy forensic evidence","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2022-10-26","modified":"2022-12-30","tags":["attack.stealth","attack.t1070"],"technique_ids":["T1070"],"logsource":{"category":"file_delete","product":"windows"},"falsepositives":["Possible FP during log rotation"],"references":["https://m365internals.com/2022/10/07/hunting-in-on-premises-exchange-server-logs/"],"source_path":"rules/windows/file/file_delete/file_delete_win_delete_exchange_powershell_logs.yml","source_sha256":"175ab703cdab562d894996e225dff7d3248af3b0c49c75a5fea5f01debc71f00","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/file/file_delete/file_delete_win_delete_exchange_powershell_logs.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Exchange PowerShell Cmdlet History Deleted\nid: a55349d8-9588-4c5a-8e3b-1925fe2a4ffe\nstatus: test\ndescription: Detects the deletion of the Exchange PowerShell cmdlet History logs which may indicate an attempt to destroy forensic evidence\nreferences:\n    - https://m365internals.com/2022/10/07/hunting-in-on-premises-exchange-server-logs/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-10-26\nmodified: 2022-12-30\ntags:\n    - attack.stealth\n    - attack.t1070\nlogsource:\n    category: file_delete\n    product: windows\ndetection:\n    selection:\n        TargetFilename|startswith: '\\Logging\\CmdletInfra\\LocalPowerShell\\Cmdlet\\'\n        TargetFilename|contains: '_Cmdlet_'\n    condition: selection\nfalsepositives:\n    - Possible FP during log rotation\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1070","id":"T1070","name":"Indicator Removal","page":"techniques/enterprise/T1070/"}],"data_path":"data/detection-rules/a55349d8-9588-4c5a-8e3b-1925fe2a4ffe.json","kind":"sigma"}