Trojan is a program which often looks like a legitimate program such as a game or utility. It travels with another program which you may download from a website or receive as an attachment in an e-mail. When executed, Trojan scan gathers information about our computer (files, passwords, etc.) without our knowledge and transmits this information back to the fraudster who has sent the trojan.
At times, this virus is designed specifically to capture credit card related data and build a mini- database at a pre-decided location for misuse by fraudsters.
In extreme cases, Trojan can also give the fraudster complete access to our computer without our knowledge. Once this type of Trojan has been installed on our computer, the attacker can access and use our computer as if they were the real owner!
A sample of the pop-up appearing on the infected screen is given below.