Detectionmediumtest
WebDav Client Execution Via Rundll32.EXE
Detects "svchost.exe" spawning "rundll32.exe" with command arguments like "C:\windows\system32\davclnt.dll,DavSetCookie". This could be an indicator of exfiltration or use of WebDav to launch code (hosted on a WebDav server).
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Launch
Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)Created Sat May 02Updated Mon Sep 182dbd9d3d-9e27-42a8-b8df-f13825c6c3d5windows
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: '\svchost.exe'
selection_img:
- Image|endswith: '\rundll32.exe'
- OriginalFileName: 'RUNDLL32.EXE'
selection_cli:
CommandLine|contains: 'C:\windows\system32\davclnt.dll,DavSetCookie'
condition: all of selection_*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
2dbd9d3d-9e27-42a8-b8df-f13825c6c3d5
Status
test
Level
medium
Type
Detection
Created
Sat May 02
Modified
Mon Sep 18
Path
rules/windows/process_creation/proc_creation_win_rundll32_webdav_client_execution.yml
Raw Tags
attack.exfiltrationattack.t1048.003