Hiding in Plain Ledger: Four Months of a ClickFix Operator's Blockchain C2
To hide its command-and-control server, this operation writes the address onto a public blockchain. That makes the C2 impossible to seize or sinkhole — but it also means every time the operator moves servers, they leave a permanent, timestamped entry in a ledger anyone can read. I pulled that ledger. It runs to four months and roughly 127 delivery hosts from a single smart contract, and it was still updating the day I looked. ...