{"id":"52788a70-f1da-40dd-8fbd-73b5865d6568","title":"JScript Compiler Execution","description":"Detects the execution of the \"jsc.exe\" (JScript Compiler).\nAttacker might abuse this in order to compile JScript files on the fly and bypassing application whitelisting.\n","author":"frack113","status":"test","level":"low","date":"2022-05-02","modified":"2024-04-24","tags":["attack.execution","attack.stealth","attack.t1127"],"technique_ids":["T1127"],"logsource":{"product":"windows","category":"process_creation"},"falsepositives":["Legitimate use to compile JScript by developers."],"references":["https://lolbas-project.github.io/lolbas/Binaries/Jsc/","https://www.phpied.com/make-your-javascript-a-windows-exe/","https://twitter.com/DissectMalware/status/998797808907046913"],"source_path":"rules/windows/process_creation/proc_creation_win_jsc_execution.yml","source_sha256":"07552b3fa5fcdf4f413eee2716e21e9b2cbdf11e733597ca6adbf94645fc70d7","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_jsc_execution.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: JScript Compiler Execution\nid: 52788a70-f1da-40dd-8fbd-73b5865d6568\nstatus: test\ndescription: |\n    Detects the execution of the \"jsc.exe\" (JScript Compiler).\n    Attacker might abuse this in order to compile JScript files on the fly and bypassing application whitelisting.\nreferences:\n    - https://lolbas-project.github.io/lolbas/Binaries/Jsc/\n    - https://www.phpied.com/make-your-javascript-a-windows-exe/\n    - https://twitter.com/DissectMalware/status/998797808907046913\nauthor: frack113\ndate: 2022-05-02\nmodified: 2024-04-24\ntags:\n    - attack.execution\n    - attack.stealth\n    - attack.t1127\nlogsource:\n    product: windows\n    category: process_creation\ndetection:\n    selection:\n        - Image|endswith: '\\jsc.exe'\n        - OriginalFileName: 'jsc.exe'\n    condition: selection\nfalsepositives:\n    - Legitimate use to compile JScript by developers.\n# Note: Can be decreased to informational or increased to medium depending on how this utility is used.\nlevel: low\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1127","id":"T1127","name":"Trusted Developer Utilities Proxy Execution","page":"techniques/enterprise/T1127/"}],"data_path":"data/detection-rules/52788a70-f1da-40dd-8fbd-73b5865d6568.json","kind":"sigma"}