Discovering the Anti-Virus Signature and Bypassing It

This post investigates how Windows Defender detects the regsvr32 /i:http ... scrobj.dll (Squiblydoo) technique and documents a manual methodology to discover the detection signature. The author demonstrates multiple bypasses (renaming the DLL, creating symbolic links, using NTFS Alternate Data Streams, placing the SCT locally, and using bitsadmin to download the payload) with example commands and screenshots, concluding that defenders should consider alternative detection approaches.