cscli scenarios install sigmahq/proc_creation_win_schtasks_reg_loader_encoded1type: trigger2name: sigmahq/proc_creation_win_schtasks_reg_loader_encoded3description: |4 Detects the creation of a schtask that potentially executes a base64 encoded payload stored in the Windows Registry using PowerShell.5filter: |6 (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\schtasks.exe' || evt.Parsed.OriginalFileName == 'schtasks.exe') && evt.Parsed.CommandLine contains '/Create' && (evt.Parsed.CommandLine contains 'FromBase64String' || evt.Parsed.CommandLine contains 'encodedcommand') && (evt.Parsed.CommandLine contains 'Get-ItemProperty' || evt.Parsed.CommandLine contains ' gp ') && (evt.Parsed.CommandLine contains 'HKCU:' || evt.Parsed.CommandLine contains 'HKLM:' || evt.Parsed.CommandLine contains 'registry::' || evt.Parsed.CommandLine contains 'HKEY_'))7blackhole: 2m8#status: test9labels:10 service: windows11 confidence: 112 spoofable: 013 classification:14 - attack.t1053.00515 - attack.t1059.0011617 label: "Scheduled Task Executing Encoded Payload from Registry"18 behavior : "windows:audit"19 remediation: false2021scope:22 type: ParentProcessId23 expression: evt.Parsed.ParentProcessId2425