Home » Crypto Market News » State Hackers Are Turning Public Blockchains Into Malware Infrastructure Blockchain-based malware infrastructure is expanding as North Korean and Iranian operators adopt persistent on-chain C2 systems. Blockchain dead drops, a technique that hides malware command-and-control data in public blockchain transactions, surged about 440% over the past year, according to a September 17 report from blockchain analytics firm Chainalysis.