Explore a gripping investigation into a sophisticated telco hack during this Hack In The Box Security Conference talk. Delve into the "Athens Affair," a 2005 case involving advanced phone tapping of government officials, and discover how a routine security audit of a mobile network operator led to the observation of a live session by the same suspected offensive team. Examine the attacker's methodologies, tools, and command and control protocols, as well as forensic analysis findings. Learn about the growing threats faced by critical telecommunications infrastructures and the challenges in securing them. Gain insights into telco basics, intruder countermeasures, and the mysterious "Greek Ghosts." Analyze the PLEX language, MML processing, and the speaker's experiences in the mobile telecommunications industry since the early 90s.