A ransomware crypto check screens a wallet for links to addresses used to collect ransom payments; Plastron flags ransomware-related exposure free across seven EVM chains, showing the flagged counterparties involved.

Ransomware operations have collected billions of dollars in cryptocurrency from victims around the world, and the payment addresses used in these attacks are tracked exhaustively by law enforcement, blockchain analytics firms, and government agencies. OFAC has designated several ransomware groups on the SDN list — including Evil Corp, REvil, and the operators of Kaseya and Colonial Pipeline ransomware variants — making transactions with their designated addresses a sanctions violation. The FBI, CISA, and Treasury jointly publish ransomware advisory notices that include cryptocurrency wallet addresses used in payment collection, and these addresses are fed into the blockchain analytics databases that exchanges use for screening. For ordinary users, the risk comes from the post-payment fund flows: ransomware operators move payment proceeds through exchanges, DEX protocols, and mixing services in an effort to cash out. Funds moved through these channels reach ordinary wallets through trades, liquidity pools, and protocol interactions. If your wallet has counterparties that were used as ransomware payment collection or laundering addresses, exchange compliance systems will identify that relationship. Additionally, some businesses that were victimized by ransomware paid ransoms and then deposited funds to exchanges — if their paying wallet is in your counterparty history, you carry indirect exposure from their payment.