cscli scenarios install sigmahq/proc_creation_win_susp_double_extension_parent1type: trigger2name: sigmahq/proc_creation_win_susp_double_extension_parent3description: |4 Detect execution of suspicious double extension files in ParentCommandLine5filter: |6 (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.ParentImage endsWith '.doc.lnk' || evt.Parsed.ParentImage endsWith '.docx.lnk' || evt.Parsed.ParentImage endsWith '.xls.lnk' || evt.Parsed.ParentImage endsWith '.xlsx.lnk' || evt.Parsed.ParentImage endsWith '.ppt.lnk' || evt.Parsed.ParentImage endsWith '.pptx.lnk' || evt.Parsed.ParentImage endsWith '.rtf.lnk' || evt.Parsed.ParentImage endsWith '.pdf.lnk' || evt.Parsed.ParentImage endsWith '.txt.lnk' || evt.Parsed.ParentImage endsWith '.doc.js' || evt.Parsed.ParentImage endsWith '.docx.js' || evt.Parsed.ParentImage endsWith '.xls.js' || evt.Parsed.ParentImage endsWith '.xlsx.js' || evt.Parsed.ParentImage endsWith '.ppt.js' || evt.Parsed.ParentImage endsWith '.pptx.js' || evt.Parsed.ParentImage endsWith '.rtf.js' || evt.Parsed.ParentImage endsWith '.pdf.js' || evt.Parsed.ParentImage endsWith '.txt.js' || evt.Parsed.ParentCommandLine contains '.doc.lnk' || evt.Parsed.ParentCommandLine contains '.docx.lnk' || evt.Parsed.ParentCommandLine contains '.xls.lnk' || evt.Parsed.ParentCommandLine contains '.xlsx.lnk' || evt.Parsed.ParentCommandLine contains '.ppt.lnk' || evt.Parsed.ParentCommandLine contains '.pptx.lnk' || evt.Parsed.ParentCommandLine contains '.rtf.lnk' || evt.Parsed.ParentCommandLine contains '.pdf.lnk' || evt.Parsed.ParentCommandLine contains '.txt.lnk' || evt.Parsed.ParentCommandLine contains '.doc.js' || evt.Parsed.ParentCommandLine contains '.docx.js' || evt.Parsed.ParentCommandLine contains '.xls.js' || evt.Parsed.ParentCommandLine contains '.xlsx.js' || evt.Parsed.ParentCommandLine contains '.ppt.js' || evt.Parsed.ParentCommandLine contains '.pptx.js' || evt.Parsed.ParentCommandLine contains '.rtf.js' || evt.Parsed.ParentCommandLine contains '.pdf.js' || evt.Parsed.ParentCommandLine contains '.txt.js')7blackhole: 2m8#status: test9labels:10 service: windows11 confidence: 112 spoofable: 013 classification:14 - attack.t1036.0071516 label: "Suspicious Parent Double Extension File Execution"17 behavior : "windows:audit"18 remediation: false1920scope:21 type: ParentProcessId22 expression: evt.Parsed.ParentProcessId2324