DNS rebinding hostname generator — r.blackmail.zip
Each DNS query alternates between the two IPs. Set a short sleep between page load
and your fetch so the browser re-queries DNS.
Typical flow: victim loads page → JS waits → DNS TTL expires →
next fetch() hits IP2 (e.g. 127.0.0.1:8080).
AABBCCDD.EEFFGGHH.r.blackmail.zip — each group is the hex-encoded IP.