{"id":"28c8f68b-098d-45af-8d43-8089f3e35403","title":"Potential Register_App.Vbs LOLScript Abuse","description":"Detects potential abuse of the \"register_app.vbs\" script that is part of the Windows SDK. The script offers the capability to register new VSS/VDS Provider as a COM+ application. Attackers can use this to install malicious DLLs for persistence and execution.","author":"Austin Songer @austinsonger","status":"test","level":"medium","date":"2021-11-05","modified":"2022-07-07","tags":["attack.stealth","attack.t1218"],"technique_ids":["T1218"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Other VB scripts that leverage the same starting command line flags"],"references":["https://twitter.com/sblmsrsn/status/1456613494783160325?s=20","https://github.com/microsoft/Windows-classic-samples/blob/7cbd99ac1d2b4a0beffbaba29ea63d024ceff700/Samples/Win7Samples/winbase/vss/vsssampleprovider/register_app.vbs"],"source_path":"rules/windows/process_creation/proc_creation_win_lolscript_register_app.yml","source_sha256":"81bd73565658c1ecd3ca7f6d86002793e6028829e330b377b44dcabd29682175","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_lolscript_register_app.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 Register_App.Vbs LOLScript Abuse\nid: 28c8f68b-098d-45af-8d43-8089f3e35403\nstatus: test\ndescription: Detects potential abuse of the \"register_app.vbs\" script that is part of the Windows SDK. The script offers the capability to register new VSS/VDS Provider as a COM+ application. Attackers can use this to install malicious DLLs for persistence and execution.\nreferences:\n    - https://twitter.com/sblmsrsn/status/1456613494783160325?s=20\n    - https://github.com/microsoft/Windows-classic-samples/blob/7cbd99ac1d2b4a0beffbaba29ea63d024ceff700/Samples/Win7Samples/winbase/vss/vsssampleprovider/register_app.vbs\nauthor: Austin Songer @austinsonger\ndate: 2021-11-05\nmodified: 2022-07-07\ntags:\n    - attack.stealth\n    - attack.t1218\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith:\n              - '\\cscript.exe'\n              - '\\wscript.exe'\n        - OriginalFileName:\n              - 'cscript.exe'\n              - 'wscript.exe'\n    selection_cli:\n        CommandLine|contains: '.vbs -register ' # register_app.vbs\n    condition: all of selection*\nfalsepositives:\n    - Other VB scripts that leverage the same starting command line flags\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1218","id":"T1218","name":"System Binary Proxy Execution","page":"techniques/enterprise/T1218/"}],"data_path":"data/detection-rules/28c8f68b-098d-45af-8d43-8089f3e35403.json","kind":"sigma"}