Chainalysis Starts Reopening Compliance Tools Behind IP Allowlists in Sixth Breach Update

Chainalysis started restoring access to its KYT transaction-monitoring and Address Screening tools on Friday, one group of customers at a time, after the blockchain analytics firm disclosed late Wednesday that password hashes and live tokens “for all Chainalysis users” had been exposed to an attacker. Customers that haven’t yet sent the trusted IP addresses they want allowlisted must do that first, the company said in a 3:30 a.m. ET update. Once access is granted, every user has to reset their password, and rotate API keys where applicable, before registering transactions. More customers will be let in as each phase checks out. Reactor and Data Solutions stay offline; the company said external security experts are helping it harden its systems before those two return.

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