A China-linked cyber espionage operation targeting multiple telecom providers in the Middle East was recently discovered by Bitdefender Labs. A wide range of tools were used for this operation, both open-source and custom-built. Download the full research paper: "Cyber-Espionage in the Middle East: Investigating a New BackdoorDiplomacy Threat Actor Campaign" if you want to dive deeper. We attribute this operation to BackdoorDiplomacy, a known advanced persistent threat group (APT).
Article Link: Deep Dive Into a BackdoorDiplomacy Attack – A Study of an Attacker’s Toolkit