Office Product Spawning Rundll32 With No DLL

Office Product Spawning Rundll32 With No DLL

Description

The following detection identifies the latest behavior utilized by IcedID malware family. This detection identifies any Windows Office Product spawning rundll32.exe without a .dll file extension. In malicious instances, the command-line of rundll32.exe will look like rundll32 ..\oepddl.igk2,DllRegisterServer. In addition, Threat Research has released a detection identifying the use of DllRegisterServer on the command-line of rundll32.exe. In this instance, we narrow our detection down to the Office suite as a parent process. During triage, review all file modifications. Capture and analyze the DLL that was dropped to disk. The Office Product will have reached out to a remote destination, capture and block the IPs or domain. Review additional parallel processes for further activity.

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Office Product Spawning Rundll32 With No DLL Help

To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the Endpoint datamodel in the Processes node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product.

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