The recently exposed DeadLock ransomware once again reminds us of the security risks in the blockchain ecosystem. Since this malicious program first appeared in July, it has employed quite cunning countermeasures—using smart contracts on the Polygon blockchain to store and dynamically rotate proxy server addresses, thereby continuously updating command and control infrastructure and effectively avoiding traditional blacklisting strategies.

The infection process is straightforward: once a user's system is compromised, data is encrypted and locked. The hackers then issue a final ultimatum—pay the ransom, or the stolen sensitive information will be sold on the dark web. This dual extortion mode has become the standard tactic for current ransomware.

It is worth noting that the attackers cleverly reverse the use of blockchain technology—smart contracts, originally meant as a security infrastructure, are instead used to build more covert criminal networks. This reminds us that while enjoying the convenience of blockchain, we must strengthen our security awareness, regularly check for system vulnerabilities, and prevent becoming targets of such threats.