{"id":"68654bf0-4412-43d5-bfe8-5eaa393cd939","title":"Potential DLL Sideloading Via JsSchHlp","description":"Detects potential DLL sideloading using JUSTSYSTEMS Japanese word processor","author":"frack113","status":"test","level":"medium","date":"2022-12-14","modified":"","tags":["attack.persistence","attack.privilege-escalation","attack.execution","attack.stealth","attack.t1574.001"],"technique_ids":["T1574.001"],"logsource":{"category":"image_load","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.welivesecurity.com/2022/12/14/unmasking-mirrorface-operation-liberalface-targeting-japanese-political-entities/","http://www.windowexe.com/bbs/board.php?q=jsschhlp-exe-c-program-files-common-files-justsystem-jsschhlp-jsschhlp"],"source_path":"rules/windows/image_load/image_load_side_load_jsschhlp.yml","source_sha256":"2db7168ad538398afc19f3a2c052348bb7228e81a751f799971a2a18ee3d6b2d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/image_load/image_load_side_load_jsschhlp.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 Via JsSchHlp\nid: 68654bf0-4412-43d5-bfe8-5eaa393cd939\nstatus: test\ndescription: Detects potential DLL sideloading using JUSTSYSTEMS Japanese word processor\nreferences:\n    - https://www.welivesecurity.com/2022/12/14/unmasking-mirrorface-operation-liberalface-targeting-japanese-political-entities/\n    - http://www.windowexe.com/bbs/board.php?q=jsschhlp-exe-c-program-files-common-files-justsystem-jsschhlp-jsschhlp\nauthor: frack113\ndate: 2022-12-14\ntags:\n    - attack.persistence\n    - attack.privilege-escalation\n    - attack.execution\n    - attack.stealth\n    - attack.t1574.001\nlogsource:\n    category: image_load\n    product: windows\ndetection:\n    selection:\n        ImageLoaded|endswith: '\\JSESPR.dll'\n    filter:\n        ImageLoaded|startswith: 'C:\\Program Files\\Common Files\\Justsystem\\JsSchHlp\\'\n    condition: selection and not filter\nfalsepositives:\n    - Unknown\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/68654bf0-4412-43d5-bfe8-5eaa393cd939.json","kind":"sigma"}