cscli scenarios install sigmahq/proc_creation_win_wmi_backdoor_exchange_transport_agent1type: trigger2name: sigmahq/proc_creation_win_wmi_backdoor_exchange_transport_agent3description: |4 Detects a WMI backdoor in Exchange Transport Agents via WMI event filters5filter: |6 (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.ParentImage endsWith '\\EdgeTransport.exe' && not (evt.Parsed.Image == 'C:\\Windows\\System32\\conhost.exe' || evt.Parsed.Image startsWith 'C:\\Program Files\\Microsoft\\Exchange Server\\' && evt.Parsed.Image endsWith '\\Bin\\OleConverter.exe'))7blackhole: 2m8#status: test9labels:10 service: windows11 confidence: 112 spoofable: 013 classification:14 - attack.t1546.0031516 label: "WMI Backdoor Exchange Transport Agent"17 behavior : "windows:audit"18 remediation: false1920scope:21 type: ParentProcessId22 expression: evt.Parsed.ParentProcessId2324