Chainalysis Breach Exposes Passwords and Tokens for All Users, Forcing Service Shutdowns

Blockchain analytics firm Chainalysis has disclosed that hackers accessed password hashes and active authentication tokens for all users of its platform, prompting the company to shut down several major services as it responds to an ongoing cyberattack. In its latest update, published Wednesday , Nov. 4, at 11 p.m. ET, Chainalysis said it discovered on Monday that customer information—including names, usernames, password hashes and live tokens—had been exposed to a malicious actor. The company also confirmed suspicious activity involving its compliance monitoring products, raising concerns about the broader scope of the breach. The disclosure represents a significant escalation from the company’s initial Oct. 30 announcement, when Chainalysis reported that hackers had accessed basic customer information but said there was no evidence of compromised authentication credentials or investigation data.

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