The useful clue here is not that another IoT botnet exists. It is that this one was built as a reusable platform, so blocking one command path or one device type does not meaningfully break it.
Unit 42 says TuxBot v3 Evolution is a previously undocumented modular framework with source code, binaries for 17 architectures, and exploit support for more than 30 IoT device families. Its bot agent brute-forces Telnet, then talks to command infrastructure over encrypted TCP with fallbacks through a domain generator, peer-to-peer gossip, IRC, DNS TXT queries, or HTTP polling.
That mix makes the botnet harder to suppress with a single blocklist or one cleanup play. It also shows why internet-exposed embedded devices with weak credentials and weak egress controls keep getting recycled into larger botnets.