Introduction
The new ransomware strain called DeadLock, is a kind of problem. It shows us how people involved in cyber-extortion are changing their ways. It first appeared in mid-2025, and has gained attention because it is using blockchain and specifically Polygon smart contracts to keep its secret operations hidden. The people who made DeadLock are using this to control their computer code without being caught.
How DeadLock Works
Unlike traditional ransomware-as-a-service models, DeadLock acts as an independent group focused on making money. It breaks in using a bring-your-own-vulnerable-driver (BYOVD) method. Once it is inside, it encrypts files with a custom cipher, adds a “.dlock” extension, and sends ransom instructions through the privacy-oriented Session messenger.
Blockchain as a Shield
DeadLock’s main innovation is using Polygon smart contracts to store changing proxy server addresses. Instead of keeping fixed servers, the malware retrieves live command-and-control data directly from the blockchain. This makes it really hard for the good guys to stop DeadLock because they cannot just block or take control of the infrastructure, which is not controlled by one person or group.
Why It Matters
Although current attacks are limited, DeadLock highlights how decentralized finance technologies can be repurposed for cybercrime. For businesses and financial institutions, it reinforces the need for robust endpoint protection, rapid patching, and closer monitoring of emerging ransomware tradecraft.
