Topping tech headlines on Monday, security experts warned of malware that's been used to spy on international targets.



Known as Regin, the back-door Trojan is what security firm Symantec called "a complex piece of malware whose structure displays a degree of technical competence rarely seen." Reports suggest that the threat can be traced to U.S. and U.K. officials, much like Stuxnet. The malware is able to load custom features tailored to each target, then follows a five-stage chain of decryption. For more, see the video below.



In other news, Apple launched a short-term section of its App Store featuring 25 applications with exclusive content, the proceeds of which will go directly to the Global Fund to Fight AIDS. Cupertino will also donate a portion of its global retail and online sales on two of the biggest shopping days of the year: Friday, Nov. 28 and Monday, Dec. 1. Reality star Kim Kardashian is doing something similar with her mobile game, Kim Kardashian Hollywood.



Meanwhile, T-Mobile's Music Freedom program added 14 new streaming services, including Google Play Music, Xbox Music, and SoundCloud. The new additions more than double the number of providers covered by the program, which lets users play music without drawing from their high-speed data allotment.



Be sure to check out a few other stories making headlines in the links below.