Stay secure. Do not let curiosity about a random string of keywords compromise your home network.
Buy a newer router. Even a $20 used Archer C6 v2 is far safer.
It is important to clarify from the start:
| Check | Safe | Malicious | |-------|------|------------| | File extension | .bin | .exe , .scr , .zip with password | | File size | ~3–4 MB (for DIR-612) | <1 MB or >10 MB | | Source domain | dlink.com , openwrt.org , github.com/openwrt | dl-firmware[.]xyz , hotfixes[.]biz | | Hashes | Published on official site | No hash provided | | Digital signature | Signed by D-Link / OpenWrt | Unsigned or fake signature |