Suspicious 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 WebDav…
Description
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 WebDav Server) or potentially a sign of exploitation of CVE-2023-23397
Detection logic
Detection requirements
- Platform
- ESXiLinuxmacOSNetwork DevicesWindows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source product
- windows
- Log source category
- process_creation
Known benign triggers
- Unknown
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
References
| Reference | Cited by |
|---|---|
| twitter.com/aceresponder/status/1636116096506818562 | Only this detection cites it |
| www.mdsec.co.uk/2023/03/exploiting-cve-2023-23397-microsoft-outlook-elevation-of-privilege-vulnerability/ | Only this detection cites it |
| www.microsoft.com/en-us/security/blog/2023/03/24/guidance-for-investigating-attacks-using-cve-2023-23397/ | Only this detection cites it |
| www.microsoft.com/en-us/security/blog/wp-content/uploads/2023/03/Figure-7-sample-webdav-process-create-event.png | Only this detection cites it |
| www.pwndefend.com/2023/03/15/the-long-game-persistent-hash-theft/ | 3from 2 sources |
From the source
- At source
- Open at source
- Upstream identifier
- 982e9f2d-1a85-4d5b-aea4-31f5e97c6555
- Tagged by the source as
- attack.exfiltrationcve.2023-23397
Licence
- Published under
- Detection Rule License 1.1Read the licence
- Attribution
- Required
Authorship
- Published
- Aug 26, 2026
- Version
- 1