1type: trigger
2name: sigmahq/proc_creation_win_sdiagnhost_susp_child
3description: |
4  Detects sdiagnhost.exe calling a suspicious child process (e.g. used in exploits for Follina / CVE-2022-30190)
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.ParentImage endsWith '\\sdiagnhost.exe' && (evt.Parsed.Image endsWith '\\powershell.exe' || evt.Parsed.Image endsWith '\\pwsh.exe' || evt.Parsed.Image endsWith '\\cmd.exe' || evt.Parsed.Image endsWith '\\mshta.exe' || evt.Parsed.Image endsWith '\\cscript.exe' || evt.Parsed.Image endsWith '\\wscript.exe' || evt.Parsed.Image endsWith '\\taskkill.exe' || evt.Parsed.Image endsWith '\\regsvr32.exe' || evt.Parsed.Image endsWith '\\rundll32.exe' || evt.Parsed.Image endsWith '\\calc.exe') && not (evt.Parsed.Image endsWith '\\cmd.exe' && evt.Parsed.CommandLine contains 'bits' || evt.Parsed.Image endsWith '\\powershell.exe' && (evt.Parsed.CommandLine endsWith '-noprofile -' || evt.Parsed.CommandLine endsWith '-noprofile')))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1036
15   - attack.t1218
16
17  label: "Sdiagnhost Calling Suspicious Child Process"
18  behavior : "windows:audit"
19  remediation: false
20
21scope:
22  type: ParentProcessId
23  expression: evt.Parsed.ParentProcessId
24
25