{"id":"cdb15e19-c2d0-432a-928e-e49c8c60dcf2","title":"Potential DLL Sideloading Of MsCorSvc.DLL","description":"Detects potential DLL sideloading of \"mscorsvc.dll\".","author":"Wietze Beukema","status":"test","level":"medium","date":"2024-07-11","modified":"2025-02-26","tags":["attack.privilege-escalation","attack.persistence","attack.execution","attack.stealth","attack.t1574.001"],"technique_ids":["T1574.001"],"logsource":{"product":"windows","category":"image_load"},"falsepositives":["Legitimate applications loading their own versions of the DLL mentioned in this rule."],"references":["https://hijacklibs.net/entries/microsoft/built-in/mscorsvc.html"],"source_path":"rules/windows/image_load/image_load_side_load_mscorsvc.yml","source_sha256":"ef979487444b798eeb48d1ffd9a168993f5ab7600072fb2d5be92a94f613a24e","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/image_load/image_load_side_load_mscorsvc.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 DLL Sideloading Of MsCorSvc.DLL\nid: cdb15e19-c2d0-432a-928e-e49c8c60dcf2\nstatus: test\ndescription: Detects potential DLL sideloading of \"mscorsvc.dll\".\nreferences:\n    - https://hijacklibs.net/entries/microsoft/built-in/mscorsvc.html\nauthor: Wietze Beukema\ndate: 2024-07-11\nmodified: 2025-02-26\ntags:\n    - attack.privilege-escalation\n    - attack.persistence\n    - attack.execution\n    - attack.stealth\n    - attack.t1574.001\nlogsource:\n    product: windows\n    category: image_load\ndetection:\n    selection:\n        ImageLoaded|endswith: '\\mscorsvc.dll'\n    filter_main_generic:\n        ImageLoaded|startswith:\n            - 'C:\\Windows\\Microsoft.NET\\Framework\\'\n            - 'C:\\Windows\\Microsoft.NET\\Framework64\\'\n            - 'C:\\Windows\\Microsoft.NET\\FrameworkArm\\'\n            - 'C:\\Windows\\Microsoft.NET\\FrameworkArm64\\'\n            - 'C:\\Windows\\WinSxS\\'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Legitimate applications loading their own versions of the DLL mentioned in this rule.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1574.001","id":"T1574.001","name":"DLL","page":"techniques/enterprise/T1574.001/"}],"data_path":"data/detection-rules/cdb15e19-c2d0-432a-928e-e49c8c60dcf2.json","kind":"sigma"}