1type: trigger
2name: sigmahq/proc_creation_win_susp_abusing_debug_privilege
3description: |
4  Detection of unusual child processes by different system processes
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.ParentImage endsWith '\\winlogon.exe' || evt.Parsed.ParentImage endsWith '\\services.exe' || evt.Parsed.ParentImage endsWith '\\lsass.exe' || evt.Parsed.ParentImage endsWith '\\csrss.exe' || evt.Parsed.ParentImage endsWith '\\smss.exe' || evt.Parsed.ParentImage endsWith '\\wininit.exe' || evt.Parsed.ParentImage endsWith '\\spoolsv.exe' || evt.Parsed.ParentImage endsWith '\\searchindexer.exe') && (evt.Parsed.User contains 'AUTHORI' || evt.Parsed.User contains 'AUTORI') && (evt.Parsed.Image endsWith '\\powershell.exe' || evt.Parsed.Image endsWith '\\pwsh.exe' || evt.Parsed.Image endsWith '\\cmd.exe' || evt.Parsed.OriginalFileName in ['PowerShell.EXE', 'pwsh.dll', 'Cmd.Exe']) && not (evt.Parsed.CommandLine contains ' route ' && evt.Parsed.CommandLine contains ' ADD '))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1548
15
16  label: "Abused Debug Privilege by Arbitrary Parent Processes"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24