Blockchain analytics company Chainalysis has been hit by a cyberattack. According to the company, user IDs, full names, email addresses and role titles of the people who work with its software at client organisations were taken. Investigation files, passwords and access keys are not affected based on what is known so far. For retail investors in Germany the breach matters mainly because real names from compliance departments and investigation teams are dangerous raw material for phishing.
Chainalysis data breach: what became known on October 30
On Friday, October 30, 2026, Chainalysis published a post titled "Chainalysis Security Incident Information" on its own blog. In it the company confirms that an external attacker gained unauthorised access to systems and internal tools "this month". The post contains the full text of the email that had previously gone to affected customers. It can be read in the Chainalysis security notice.
The incident first became public through a post by the International Cyber Digest channel, which drew on exactly that customer email. Trade outlet The Block repo...
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