1type: trigger
2name: sigmahq/proc_creation_win_rundll32_spawn_explorer
3description: |
4  Detects RunDLL32.exe spawning explorer.exe as child, which is very uncommon, often observes Gamarue spawning the explorer.exe process in an unusual way
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.ParentImage endsWith '\\rundll32.exe' && evt.Parsed.Image endsWith '\\explorer.exe' && not (evt.Parsed.ParentCommandLine contains '\\shell32.dll,Control_RunDLL'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1218.011
15
16  label: "RunDLL32 Spawning Explorer"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24