{"id":"f3d39c45-de1a-4486-a687-ab126124f744","title":"Sdiagnhost Calling Suspicious Child Process","description":"Detects sdiagnhost.exe calling a suspicious child process (e.g. used in exploits for Follina / CVE-2022-30190)","author":"Nextron Systems, @Kostastsale","status":"test","level":"high","date":"2022-06-01","modified":"2024-08-23","tags":["attack.stealth","attack.t1036","attack.t1218"],"technique_ids":["T1036","T1218"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://twitter.com/nao_sec/status/1530196847679401984","https://doublepulsar.com/follina-a-microsoft-office-code-execution-vulnerability-1a47fce5629e","https://app.any.run/tasks/713f05d2-fe78-4b9d-a744-f7c133e3fafb/","https://app.any.run/tasks/f420d295-0457-4e9b-9b9e-6732be227583/","https://app.any.run/tasks/c4117d9a-f463-461a-b90f-4cd258746798/"],"source_path":"rules/windows/process_creation/proc_creation_win_sdiagnhost_susp_child.yml","source_sha256":"a2aa75dc3117414fb5a678796fec20b4db59f848a073f4515d2c965cbc7463c8","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_sdiagnhost_susp_child.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Sdiagnhost Calling Suspicious Child Process\nid: f3d39c45-de1a-4486-a687-ab126124f744\nstatus: test\ndescription: Detects sdiagnhost.exe calling a suspicious child process (e.g. used in exploits for Follina / CVE-2022-30190)\nreferences:\n    - https://twitter.com/nao_sec/status/1530196847679401984\n    - https://doublepulsar.com/follina-a-microsoft-office-code-execution-vulnerability-1a47fce5629e\n    - https://app.any.run/tasks/713f05d2-fe78-4b9d-a744-f7c133e3fafb/\n    - https://app.any.run/tasks/f420d295-0457-4e9b-9b9e-6732be227583/\n    - https://app.any.run/tasks/c4117d9a-f463-461a-b90f-4cd258746798/\nauthor: Nextron Systems, @Kostastsale\ndate: 2022-06-01\nmodified: 2024-08-23\ntags:\n    - attack.stealth\n    - attack.t1036\n    - attack.t1218\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        ParentImage|endswith: '\\sdiagnhost.exe'\n        Image|endswith:\n            # Add more suspicious LOLBins\n            - '\\powershell.exe'\n            - '\\pwsh.exe'\n            - '\\cmd.exe'\n            - '\\mshta.exe'\n            - '\\cscript.exe'\n            - '\\wscript.exe'\n            - '\\taskkill.exe'\n            - '\\regsvr32.exe'\n            - '\\rundll32.exe'\n            # - '\\csc.exe'   # https://app.any.run/tasks/f420d295-0457-4e9b-9b9e-6732be227583/\n            - '\\calc.exe'  # https://app.any.run/tasks/f420d295-0457-4e9b-9b9e-6732be227583/\n    filter_main_cmd_bits:\n        Image|endswith: '\\cmd.exe'\n        CommandLine|contains: 'bits'\n    filter_main_powershell_noprofile:\n        Image|endswith: '\\powershell.exe'\n        CommandLine|endswith:\n            - '-noprofile -'\n            - '-noprofile'\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/T1218","id":"T1218","name":"System Binary Proxy Execution","page":"techniques/enterprise/T1218/"}],"data_path":"data/detection-rules/f3d39c45-de1a-4486-a687-ab126124f744.json","kind":"sigma"}