There is major money to be earned on the internet and the cybercriminals are aware of this. One of the techniques they use to generate an online revenue is the Clickfraud method. Symantec has discovered and reviewed the Trojan.Viknok malware which is responsible for various Clickfraud attacks.
The Trojan was discovered in April 2013, it infects DLL files with a malicious payload. This malware has been found on 32 and 64-bit versions on Windows XP, Vista and 7.