Botnets can be controlled via code embedded in the Bitcoin blockchain… and that code can’t be removed without forking the blockchain
“A recent piece of malware from a known crypto mining botnet campaign has started leveraging Bitcoin blockchain transactions in order to hide its backup C2 IP address. It’s a simple, yet effective, way to defeat takedown attempts.”
https://blogs.akamai.com/sitr/2021/02/bitcoins-blockchains-and-botnets.html
