{"id":"396f6630-f3ac-44e3-bfc8-1b161bc00c4e","title":"Suspicious Child Process Of Wermgr.EXE","description":"Detects suspicious Windows Error Reporting manager (wermgr.exe) child process","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-10-14","modified":"2024-08-29","tags":["attack.privilege-escalation","attack.stealth","attack.t1055","attack.t1036"],"technique_ids":["T1036","T1055"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.trendmicro.com/en_us/research/22/j/black-basta-infiltrates-networks-via-qakbot-brute-ratel-and-coba.html","https://www.echotrail.io/insights/search/wermgr.exe","https://github.com/binderlabs/DirCreate2System"],"source_path":"rules/windows/process_creation/proc_creation_win_wermgr_susp_child_process.yml","source_sha256":"772a9f60d48c0afe96483be82ca6e833da06f158f751fad42b5973d4410eb4e6","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_wermgr_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: Suspicious Child Process Of Wermgr.EXE\nid: 396f6630-f3ac-44e3-bfc8-1b161bc00c4e\nrelated:\n    - id: 5394fcc7-aeb2-43b5-9a09-cac9fc5edcd5\n      type: similar\nstatus: test\ndescription: Detects suspicious Windows Error Reporting manager (wermgr.exe) child process\nreferences:\n    - https://www.trendmicro.com/en_us/research/22/j/black-basta-infiltrates-networks-via-qakbot-brute-ratel-and-coba.html\n    - https://www.echotrail.io/insights/search/wermgr.exe\n    - https://github.com/binderlabs/DirCreate2System\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-10-14\nmodified: 2024-08-29\ntags:\n    - attack.privilege-escalation\n    - attack.stealth\n    - attack.t1055\n    - attack.t1036\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        ParentImage|endswith: '\\wermgr.exe'\n        Image|endswith:\n            - '\\cmd.exe'\n            - '\\cscript.exe'\n            - '\\ipconfig.exe'\n            - '\\mshta.exe'\n            - '\\net.exe'\n            - '\\net1.exe'\n            - '\\netstat.exe'\n            - '\\nslookup.exe'\n            - '\\powershell_ise.exe'\n            - '\\powershell.exe'\n            - '\\pwsh.exe'\n            - '\\regsvr32.exe'\n            - '\\rundll32.exe'\n            - '\\systeminfo.exe'\n            - '\\whoami.exe'\n            - '\\wscript.exe'\n    filter_main_rundll32:\n        Image|endswith: '\\rundll32.exe'\n        CommandLine|contains|all:\n            - 'C:\\Windows\\system32\\WerConCpl.dll'\n            - 'LaunchErcApp '\n        CommandLine|contains:\n            - '-queuereporting'\n            - '-responsepester'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1036","id":"T1036","name":"Masquerading","page":"techniques/enterprise/T1036/"},{"key":"enterprise/T1055","id":"T1055","name":"Process Injection","page":"techniques/enterprise/T1055/"}],"data_path":"data/detection-rules/396f6630-f3ac-44e3-bfc8-1b161bc00c4e.json","kind":"sigma"}