All right. It’s Saturday night, I have no date, a two-liter bottle of Shasta and my all-Rush mix-tape…let’s hack. On a whim I downloaded firmware v1.13 for the DIR-100 revA. Binwalk quickly found and extracted a SquashFS file system, and soon I had the firmware’s web server (/bin/webs) loaded into … Continue reading Reverse Engineering a D-Link Backdoor – /dev/ttyS0