How to detect a stealthy firmware implant on consumer routers using only free tools and a spare rpi
I once had a client bring me a home router that behaved like it had a secret life: occasional flurries of outbound traffic at 3 a.m., DNS responses that sometimes led to odd domains, and a slightly sluggish web UI. The vendor image looked normal and the firmware version matched what the vendor published. That’s the kind of situation where you start suspecting a stealthy firmware implant — code that survives reboots, hides from casual...