Entropy Ransomware Connected to Dridex Malware, as per Sophos

The recently found Entropy ransomware has coding similarities to the Dridex malware, which started out as a banking trojan. After two Entropy cybercrimes on different firms, researchers were able to establish a bond between the different pieces of malware. 

Sophos principal researcher Andrew Brandt claimed in a new study detection signature designed to detect Dridex which prompted a closer look into the Entropy virus, both of the target businesses had gadgets were unprotected. Despite the characteristic for recognizing the Dridex packer code, endpoint protection measures blocked the attack, which was started by identifying the Entropy packer code.

In all incidents, the attackers gained remote access to the target networks by infecting them with Cobalt Strike Beacons and Dridex before deploying Entropy. Despite some similarities, the twin attacks differed greatly in terms of the initial access point used to parasite its path within the networks, the period invested in each environment, and the malware utilized to initiate the final stage of the invasion. 

The attack on the media company employed the ProxyShell vulnerability to infect a vulnerable Exchange Server with a web shell, which was then used to deploy Cobalt Strike Beacons throughout the network. The attacker is alleged to have spent four months doing espionage and data theft before launching the cyberattack in December 2021. The second attack on the provincial government agency was made possible via a malicious email attachment carrying the Dri

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