{"id":"9db37458-4df2-46a5-95ab-307e7f29e675","title":"Exchange Set OabVirtualDirectory ExternalUrl Property","description":"Rule to detect an adversary setting OabVirtualDirectory External URL property to a script in Exchange Management log","author":"Jose Rodriguez @Cyb3rPandaH","status":"test","level":"high","date":"2021-03-15","modified":"2023-01-23","tags":["attack.persistence","attack.t1505.003"],"technique_ids":["T1505.003"],"logsource":{"product":"windows","service":"msexchange-management"},"falsepositives":["Unknown"],"references":["https://twitter.com/OTR_Community/status/1371053369071132675"],"source_path":"rules/windows/builtin/msexchange/win_exchange_set_oabvirtualdirectory_externalurl.yml","source_sha256":"329217678176702de3121a890f0a50b1a6b2df95c6a350f85883543e53a6e58d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/msexchange/win_exchange_set_oabvirtualdirectory_externalurl.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 Set OabVirtualDirectory ExternalUrl Property\nid: 9db37458-4df2-46a5-95ab-307e7f29e675\nstatus: test\ndescription: Rule to detect an adversary setting OabVirtualDirectory External URL property to a script in Exchange Management log\nreferences:\n    - https://twitter.com/OTR_Community/status/1371053369071132675\nauthor: Jose Rodriguez @Cyb3rPandaH\ndate: 2021-03-15\nmodified: 2023-01-23\ntags:\n    - attack.persistence\n    - attack.t1505.003\nlogsource:\n    product: windows\n    service: msexchange-management\ndetection:\n    keywords:\n        '|all':\n            - 'Set-OabVirtualDirectory'\n            - 'ExternalUrl'\n            - 'Page_Load'\n            - 'script'\n    condition: keywords\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1505.003","id":"T1505.003","name":"Web Shell","page":"techniques/enterprise/T1505.003/"}],"data_path":"data/detection-rules/9db37458-4df2-46a5-95ab-307e7f29e675.json","kind":"sigma"}