UI that are infected is in the complete sets UI section from Jappme to K'ramel so far 12 Ui are infeccted with Winrar.exe it has a hidden program ie.exe 13kb.
Scan the files before you unrar the file at.
http://www.virustotal.com/
Who ever is doing this is POS infecting the UI.So far the Compilations sections are not infected.