The virus first appeared in China and quickly managed to spread itself in 83 countries. The researchers note that the peak of the malware’s activity was seen in the USA, Spain, Mexico and Brazil.

“Of the 2 million computers analyzed, around 115,000 were infected with this malware, a phenomenon we haven’t seen since the times of the great epidemics of Kournikova or Blaster”, says Luis Corrons, Technical Director of PandaLabs. “This is no doubt an epidemic and the worst may still be to come, as the worm could begin to download more malware onto computers or to spread through other channels”.

Aside from its usual “distrubion channels”, the worm also features the possibility of being spread via USB devices. When the user inserts the USB into a computer, the autorun menu will pop up and ask the user to choose an action to be performed. Should the user choose to open the folder to see the files, this option will lead to the mawlware being launch and the computer will get infected.

According to the PandaLabs researchers, some versions of the Conficker worm are designed to extract the passwords from infected computers, thus enabling hackers to access the afore-mentioned computers much easily. It’s not hard to imagine what happens next.