{"id":"487bb375-12ef-41f6-baae-c6a1572b4dd1","title":"Potential Persistence Via Outlook Today Page","description":"Detects potential persistence activity via outlook today page.\nAn attacker can set a custom page to execute arbitrary code and link to it via the registry values \"URL\" and \"UserDefinedUrl\".\n","author":"Tobias Michalski (Nextron Systems), David Bertho (@dbertho) & Eirik Sveen (@0xSV1), Storebrand","status":"test","level":"high","date":"2021-06-10","modified":"2024-08-07","tags":["attack.persistence","attack.defense-impairment","attack.t1112"],"technique_ids":["T1112"],"logsource":{"product":"windows","category":"registry_set"},"falsepositives":["Unknown"],"references":["https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=74","https://trustedsec.com/blog/specula-turning-outlook-into-a-c2-with-one-registry-change"],"source_path":"rules/windows/registry/registry_set/registry_set_persistence_outlook_todaypage.yml","source_sha256":"85cafd0009317ce720f0dd159b913df9787494bc25c2dc9675136c2b531be1e5","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/registry/registry_set/registry_set_persistence_outlook_todaypage.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Persistence Via Outlook Today Page\nid: 487bb375-12ef-41f6-baae-c6a1572b4dd1\nrelated:\n    - id: ddd171b5-2cc6-4975-9e78-f0eccd08cc76\n      type: similar\nstatus: test\ndescription: |\n    Detects potential persistence activity via outlook today page.\n    An attacker can set a custom page to execute arbitrary code and link to it via the registry values \"URL\" and \"UserDefinedUrl\".\nreferences:\n    - https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=74\n    - https://trustedsec.com/blog/specula-turning-outlook-into-a-c2-with-one-registry-change\nauthor: Tobias Michalski (Nextron Systems), David Bertho (@dbertho) & Eirik Sveen (@0xSV1), Storebrand\ndate: 2021-06-10\nmodified: 2024-08-07\ntags:\n    - attack.persistence\n    - attack.defense-impairment\n    - attack.t1112\nlogsource:\n    product: windows\n    category: registry_set\ndetection:\n    selection_main:\n        TargetObject|contains|all:\n            - 'Software\\Microsoft\\Office\\'\n            - '\\Outlook\\Today\\'\n    selection_value_stamp:\n        TargetObject|endswith: '\\Stamp'\n        Details: 'DWORD (0x00000001)'\n    selection_value_url:\n        TargetObject|endswith:\n            - '\\URL'\n            - '\\UserDefinedUrl'\n    filter_main_office:\n        Image|startswith:\n            - 'C:\\Program Files\\Common Files\\Microsoft Shared\\ClickToRun\\'\n            - 'C:\\Program Files\\Common Files\\Microsoft Shared\\ClickToRun\\Updates\\'\n        Image|endswith: '\\OfficeClickToRun.exe'\n    condition: selection_main and 1 of selection_value_* and not 1 of filter_main_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1112","id":"T1112","name":"Modify Registry","page":"techniques/enterprise/T1112/"}],"data_path":"data/detection-rules/487bb375-12ef-41f6-baae-c6a1572b4dd1.json","kind":"sigma"}