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Cybercriminals Abused Remote Desktop Protocol (RDP) in 90% of Attacks Handled by Sophos Incident Response in 2023

Posted on April 3, 2024 by Dissent

Some more analysis of 2023 breaches. Sophos reports that for more than 150 incident response (IR) cases it handled in 2023, cybercriminals abused remote desktop protocol (RDP) in 90% of attacks.

This was the highest incidence of RDP abuse since Sophos began releasing its Active Adversary reports in 2021, covering data from 2020.

In addition, external remote services such as RDP were the most common vector by which attackers initially breached networks; they were the method of initial access in 65% of IR cases in 2023. External remote services have consistently been the most frequent source of initial access for cybercriminals since the Active Adversary reports were launched in 2020, and defenders should consider this a clear sign to prioritize the management of these services when assessing risk to the enterprise.

“External remote services are a necessary, but risky, requirement for many businesses. Attackers understand the risks these services pose and actively seek to subvert them due to the bounty that lies beyond. Exposing services without careful consideration and mitigation of their risks inevitably leads to compromise. It doesn’t take long for an attacker to find and breach an exposed RDP server, and without additional controls, neither does finding the Active Directory server that awaits on the other side,” said John Shier, field CTO, Sophos.

Read their report, It’s Oh So Quiet (?): The Sophos Active Adversary Report for 1H 2024 on Sophos.com.

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