{"id":"6f0947a4-1c5e-4e0d-8ac7-53159b8f23ca","title":"Potentially Suspicious Child Process Of Regsvr32","description":"Detects potentially suspicious child processes of \"regsvr32.exe\".","author":"elhoim, Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2022-05-05","modified":"2023-05-26","tags":["attack.stealth","attack.t1218.010"],"technique_ids":["T1218.010"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unlikely, but can rarely occur. Apply additional filters accordingly."],"references":["https://redcanary.com/blog/intelligence-insights-april-2022/","https://www.echotrail.io/insights/search/regsvr32.exe","https://www.ired.team/offensive-security/code-execution/t1117-regsvr32-aka-squiblydoo"],"source_path":"rules/windows/process_creation/proc_creation_win_regsvr32_susp_child_process.yml","source_sha256":"53bc06be29973d961a958f66b6640a8c8bfe04c4eb8e2bf385b14ee8a3b14380","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_regsvr32_susp_child_process.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potentially Suspicious Child Process Of Regsvr32\nid: 6f0947a4-1c5e-4e0d-8ac7-53159b8f23ca\nrelated:\n    - id: 8e2b24c9-4add-46a0-b4bb-0057b4e6187d\n      type: obsolete\nstatus: test\ndescription: Detects potentially suspicious child processes of \"regsvr32.exe\".\nreferences:\n    - https://redcanary.com/blog/intelligence-insights-april-2022/\n    - https://www.echotrail.io/insights/search/regsvr32.exe\n    - https://www.ired.team/offensive-security/code-execution/t1117-regsvr32-aka-squiblydoo\nauthor: elhoim, Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-05-05\nmodified: 2023-05-26\ntags:\n    - attack.stealth\n    - attack.t1218.010\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        ParentImage|endswith: '\\regsvr32.exe'\n        Image|endswith:\n            - '\\calc.exe'\n            - '\\cscript.exe'\n            - '\\explorer.exe'\n            - '\\mshta.exe'\n            - '\\net.exe'\n            - '\\net1.exe'\n            - '\\nltest.exe'\n            - '\\notepad.exe'\n            - '\\powershell.exe'\n            - '\\pwsh.exe'\n            - '\\reg.exe'\n            - '\\schtasks.exe'\n            - '\\werfault.exe'\n            - '\\wscript.exe'\n    filter_main_werfault:\n        Image|endswith: '\\werfault.exe'\n        CommandLine|contains: ' -u -p '\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Unlikely, but can rarely occur. Apply additional filters accordingly.\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1218.010","id":"T1218.010","name":"Regsvr32","page":"techniques/enterprise/T1218.010/"}],"data_path":"data/detection-rules/6f0947a4-1c5e-4e0d-8ac7-53159b8f23ca.json","kind":"sigma"}