More than 85,000 personal computers have been infected with the virus botnet Ramnit since the beginning of this year, experts from Bach Khoa Internet Security Company have said.

The hacker is reported to have distributed the virus via all gates including USB, software vulnerabilities, emails and malicious links on instant messaging programs.

Once the computer is attacked, data would be controlled and stolen by the virus, allowing the hacker to access to the victim's mail or bank accounts.

The virus also opens a backdoor through which any data file could be taken./.