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How Google Authenticator made one company’s network breach much, much worse

Arstechnica

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Security company Retool criticized Google's authenticator app for making a recent internal network breach worse. The breach resulted in attackers gaining access to the accounts of 27 customers in the cryptocurrency industry. The attack started when a Retool employee clicked on a text message link claiming to be from the company's IT team. The employee logged into the linked site and provided a password and a temporary one-time password (TOTP) from Google authenticator. The attackers then called the employee, claiming to be an IT team member, and obtained an additional multi-factor code. Retool argues that Google's recent synchronization feature for authenticator codes is highly insecure, as it allowed the attackers to compromise multiple company accounts.

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