cscli scenarios install sigmahq/proc_creation_win_rundll32_process_dump_via_comsvcs1type: trigger2name: sigmahq/proc_creation_win_rundll32_process_dump_via_comsvcs3description: |4 Detects a process memory dump via "comsvcs.dll" using rundll32, covering multiple different techniques (ordinal, minidump function, etc.)5filter: |6 (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\rundll32.exe' || evt.Parsed.OriginalFileName == 'RUNDLL32.EXE' || evt.Parsed.CommandLine contains 'rundll32') && evt.Parsed.CommandLine contains 'comsvcs' && evt.Parsed.CommandLine contains 'full' && (evt.Parsed.CommandLine contains '#-' || evt.Parsed.CommandLine contains '#+' || evt.Parsed.CommandLine contains '#24' || evt.Parsed.CommandLine contains '24 ' || evt.Parsed.CommandLine contains 'MiniDump') || evt.Parsed.CommandLine contains '24' && evt.Parsed.CommandLine contains 'comsvcs' && evt.Parsed.CommandLine contains 'full' && (evt.Parsed.CommandLine contains ' #' || evt.Parsed.CommandLine contains ',#' || evt.Parsed.CommandLine contains ', #'))7blackhole: 2m8#status: test9labels:10 service: windows11 confidence: 112 spoofable: 013 classification:14 - attack.t103615 - attack.t1003.0011617 label: "Process Memory Dump Via Comsvcs.DLL"18 behavior : "windows:audit"19 remediation: false2021scope:22 type: ParentProcessId23 expression: evt.Parsed.ParentProcessId2425