Unusual Network Connection via RunDLL32

Identifies unusual instances of rundll32.exe making outbound network connections. This may indicate adversarial Command and Control activity.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

Detection requirements

Platform: ESXi Linux macOS Network Devices Windows
The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.
Log source category: event_index

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
redcanary.com/threat-detection-report/techniques/rundll32/	Security research	Only this detection cites it
www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml	Product documentation	20

Detection rules

Unusual Network Connection via RunDLL32

Detection logic

Detection requirements

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules