{"id":"a9c73e8b-3b2d-4c45-8ef2-5f9a9c9998ad","title":"MMC Loading Script Engines DLLs","description":"Detects when the Microsoft Management Console (MMC) loads the DLL libraries like vbscript, jscript etc which might indicate an attempt\nto execute malicious scripts within a trusted system process for bypassing application whitelisting or defense evasion.\n","author":"Swachchhanda Shrawan Poudel (Nextron Systems)","status":"experimental","level":"medium","date":"2025-02-05","modified":"","tags":["attack.execution","attack.stealth","attack.t1059.005","attack.t1218.014"],"technique_ids":["T1059.005","T1218.014"],"logsource":{"category":"image_load","product":"windows"},"falsepositives":["Legitimate MMC operations or extensions loading these libraries"],"references":["https://tria.ge/241015-l98snsyeje/behavioral2","https://www.elastic.co/security-labs/grimresource"],"source_path":"rules/windows/image_load/image_load_win_mmc_loads_script_engine_dll.yml","source_sha256":"63973c6931300b19ac0648c6295569ec13385f87def378579ffb86e522053a4e","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/image_load/image_load_win_mmc_loads_script_engine_dll.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: MMC Loading Script Engines DLLs\nid: a9c73e8b-3b2d-4c45-8ef2-5f9a9c9998ad\nstatus: experimental\ndescription: |\n    Detects when the Microsoft Management Console (MMC) loads the DLL libraries like vbscript, jscript etc which might indicate an attempt\n    to execute malicious scripts within a trusted system process for bypassing application whitelisting or defense evasion.\nreferences:\n    - https://tria.ge/241015-l98snsyeje/behavioral2\n    - https://www.elastic.co/security-labs/grimresource\nauthor: Swachchhanda Shrawan Poudel (Nextron Systems)\ndate: 2025-02-05\ntags:\n    - attack.execution\n    - attack.stealth\n    - attack.t1059.005\n    - attack.t1218.014\nlogsource:\n    category: image_load\n    product: windows\ndetection:\n    selection:\n        Image|endswith: '\\mmc.exe'\n        ImageLoaded|endswith:\n            - '\\vbscript.dll'\n            - '\\jscript.dll'\n            - '\\jscript9.dll'\n    condition: selection\nfalsepositives:\n    - Legitimate MMC operations or extensions loading these libraries\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1059.005","id":"T1059.005","name":"Visual Basic","page":"techniques/enterprise/T1059.005/"},{"key":"enterprise/T1218.014","id":"T1218.014","name":"MMC","page":"techniques/enterprise/T1218.014/"}],"data_path":"data/detection-rules/a9c73e8b-3b2d-4c45-8ef2-5f9a9c9998ad.json","kind":"sigma"}