Hackers Exploit Accellion Zero-Days in Recent Data Theft and Extortion Attacks

Cybersecurity researchers on Monday tied a string of attacks targeting Accellion File Transfer Appliance (FTA) servers over the past two months to data theft and extortion campaign orchestrated by a cybercrime group called UNC2546. The attacks, which began in mid-December 2020, involved exploiting multiple zero-day vulnerabilities in the legacy FTA software to install a new web shell named DEWMODE on victim networks and exfiltrating sensitive data, which was then published on a data leak website operated by the CLOP ransomware gang.

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