This Sparrow doesn't migrate.

Bitdefender researchers uncovered a sustained cyber-espionage campaign by the China-linked FamousSparrow group targeting an Azerbaijani oil and gas company; attackers repeatedly exploited the same vulnerable Microsoft Exchange server over months and deployed evolving Deed RAT and Terndoor malware using DLL sideloading to evade detection and maintain persistence, highlighting the group's adaptability and focus on critical energy infrastructure in the South Caucasus.