Mirex Ekaterinburg is a russian company that produces CDs and DVDs usually on the post-USSR territory. They have a CD-making plant in Ekaterinburg, their DVDs are being made in India, though the package says "Made in Russia". For example, their 16x DVD-Rs can be MCC 03RG20 or MBI 03RG40. Mirex 8x DVD+Rs used to be MBIPG101 R04, even rather high-quality usually (judging by the scans, though).
Their CD-R equipment consists of 2 lines: Multi Media Masters & Machinery SA (4M) and Steag Hama. Their own CDs' mediacodes can be 4M or Plasmon. The 4M version turned out to be surprisingly fine, but the Plazmon CD-Rs degrade quickly. However, Mirex Maestro Black (Vinyl) CD-Rs are being made by Ritek, 10x CD-RWs - by MBI and 24x CDs - by Infodisc :Z. Don't know about others, however. Oh, I forget: their DVD+R DL (the package says DualLayer, BTW :eek:) are being made by Ricoh.
http://mirex.ru/index_eng.htm - rather poor info in English, though also may be interesting. I mean, there is nothing except the company info on that page. The Russian version contains the list of products, news etc. etc.
As far as I know, Mirex never fake mediacodes.