Wermgr Process Connecting To IP Check Web Services
The following analytic detects the wermgr.exe process attempting to connect to known IP check web services. It leverages Sysmon EventCode 22 to identify DNS queries made by wermgr.exe to specific IP check services.…
Description
The following analytic detects the wermgr.exe process attempting to connect to known IP check web services. It leverages Sysmon EventCode 22 to identify DNS queries made by wermgr.exe to specific IP check services. This activity is significant because wermgr.exe is typically used for Windows error reporting, and its connection to these services may indicate malicious code injection, often associated with malware like Trickbot. If confirmed malicious, this behavior could allow attackers to recon the infected machine's IP address, aiding in further exploitation and evasion tactics.
Detection logic
Detection requirements
- Platform
- PRE
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source category
- sysmon_eventid_22
Known benign triggers
- No false positives have been identified at this time.
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 |
|---|---|
| labs.vipre.com/trickbot-and-its-modules/ | 6 |
| whitehat.eu/incident-response-case-study-featuring-ryuk-and-trickbot-part-2/ | 6 |
From the source
- At source
- Open at source
- Upstream identifier
- ed313326-a0f9-11eb-a89c-acde48001122
- Tagged by the source as
- TrickbotEndpointnetworkSplunk CloudSplunk EnterpriseSplunk Enterprise Securityendpoint
Licence
- Published under
- Apache License 2.0Read the licence
- Attribution
- Required
- Obtained under
- Apache-2.0Read the origin licence
Authorship
- Published
- Aug 26, 2026
- Version
- 1