cscli scenarios install sigmahq/proc_creation_win_cmd_ntdllpipe_redirect1type: trigger2name: sigmahq/proc_creation_win_cmd_ntdllpipe_redirect3description: |4 Detects command that type the content of ntdll.dll to a different file or a pipe in order to evade AV / EDR detection. As seen being used in the POC NtdllPipe5filter: |6 (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.CommandLine contains 'type %windir%\\system32\\ntdll.dll' || evt.Parsed.CommandLine contains 'type %systemroot%\\system32\\ntdll.dll' || evt.Parsed.CommandLine contains 'type c:\\windows\\system32\\ntdll.dll' || evt.Parsed.CommandLine contains '\\ntdll.dll > \\\\.\\pipe\\')7blackhole: 2m8#status: test9labels:10 service: windows11 confidence: 112 spoofable: 013 classification:1415 label: "NtdllPipe Like Activity Execution"16 behavior : "windows:audit"17 remediation: false1819scope:20 type: ParentProcessId21 expression: evt.Parsed.ParentProcessId2223