Detectionmediumtest
Rundll32 Spawned Via Explorer.EXE
Detects execution of "rundll32.exe" with a parent process of Explorer.exe. This has been observed by variants of Raspberry Robin, as first reported by Red Canary.
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Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic3 selectors
detection:
selection_parent:
ParentImage|endswith: '\explorer.exe'
selection_img:
- Image|endswith: '\rundll32.exe'
- OriginalFileName: 'RUNDLL32.EXE'
filter_main_generic:
- CommandLine|contains: ' C:\Windows\System32\' # The space at the start is required
- CommandLine|endswith: ' -localserver 22d8c27b-47a1-48d1-ad08-7da7abd79617' # Windows 10 volume control
condition: all of selection_* and not 1 of filter_main_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Tactics
Rule Metadata
Rule ID
1723e720-616d-4ddc-ab02-f7e3685a4713
Status
test
Level
medium
Type
Detection
Created
Sat May 21
Modified
Thu Aug 31
Author
Path
rules/windows/process_creation/proc_creation_win_rundll32_parent_explorer.yml
Raw Tags
attack.defense-evasion