{"id":"15c7904e-6ad1-4a45-9b46-5fb25df37fd2","title":"Malicious PE Execution by Microsoft Visual Studio Debugger","description":"There is an option for a MS VS Just-In-Time Debugger \"vsjitdebugger.exe\" to launch specified executable and attach a debugger.\nThis option may be used adversaries to execute malicious code by signed verified binary.\nThe debugger is installed alongside with Microsoft Visual Studio package.\n","author":"Agro (@agro_sev), Ensar Şamil (@sblmsrsn), oscd.community","status":"test","level":"medium","date":"2020-10-14","modified":"2022-10-09","tags":["attack.stealth","attack.t1218"],"technique_ids":["T1218"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["The process spawned by vsjitdebugger.exe is uncommon."],"references":["https://twitter.com/pabraeken/status/990758590020452353","https://lolbas-project.github.io/lolbas/OtherMSBinaries/Vsjitdebugger/","https://learn.microsoft.com/en-us/visualstudio/debugger/debug-using-the-just-in-time-debugger?view=vs-2019"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_use_of_vsjitdebugger_bin.yml","source_sha256":"866d53daca7795d144433039d2e525e2a93b5b70903ff83b8b58bf75305038e3","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_use_of_vsjitdebugger_bin.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Malicious PE Execution by Microsoft Visual Studio Debugger\nid: 15c7904e-6ad1-4a45-9b46-5fb25df37fd2\nstatus: test\ndescription: |\n  There is an option for a MS VS Just-In-Time Debugger \"vsjitdebugger.exe\" to launch specified executable and attach a debugger.\n  This option may be used adversaries to execute malicious code by signed verified binary.\n  The debugger is installed alongside with Microsoft Visual Studio package.\nreferences:\n    - https://twitter.com/pabraeken/status/990758590020452353\n    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Vsjitdebugger/\n    - https://learn.microsoft.com/en-us/visualstudio/debugger/debug-using-the-just-in-time-debugger?view=vs-2019\nauthor: Agro (@agro_sev), Ensar Şamil (@sblmsrsn), oscd.community\ndate: 2020-10-14\nmodified: 2022-10-09\ntags:\n    - attack.stealth\n    - attack.t1218\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        ParentImage|endswith: '\\vsjitdebugger.exe'\n    reduction1:\n        Image|endswith: '\\vsimmersiveactivatehelper*.exe'\n    reduction2:\n        Image|endswith: '\\devenv.exe'\n    condition: selection and not (reduction1 or reduction2)\nfalsepositives:\n    - The process spawned by vsjitdebugger.exe is uncommon.\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/15c7904e-6ad1-4a45-9b46-5fb25df37fd2.json","kind":"sigma"}