cscli scenarios install sigmahq/proc_creation_win_explorer_nouaccheck1type: trigger2name: sigmahq/proc_creation_win_explorer_nouaccheck3description: |4 Detects suspicious starts of explorer.exe that use the /NOUACCHECK flag that allows to run all sub processes of that newly started explorer.exe without any UAC checks5filter: |6 (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.Image endsWith '\\explorer.exe' && evt.Parsed.CommandLine contains '/NOUACCHECK' && not (evt.Parsed.ParentCommandLine == 'C:\\Windows\\system32\\svchost.exe -k netsvcs -p -s Schedule' || evt.Parsed.ParentImage == 'C:\\Windows\\System32\\svchost.exe'))7blackhole: 2m8#status: test9labels:10 service: windows11 confidence: 112 spoofable: 013 classification:14 - attack.t1548.0021516 label: "Explorer NOUACCHECK Flag"17 behavior : "windows:audit"18 remediation: false1920scope:21 type: ParentProcessId22 expression: evt.Parsed.ParentProcessId2324