Security specialists AVG have released a report which reveals details of the 'Mumba' botnet of compromised PCs.
The AVG report found that the Mumba botnet has stolen more than 60GB of personal data from users including credentials from social networking Web sites, banking account details, credit card numbers and email communication.
The United States had the highest share of PCs infected by the Mumba botnet (33 per cent), followed by Germany (17 per cent), Spain (7 per cent), United Kingdom (6 per cent), Mexico and Canada (both 5 per cent).
"The unique infrastructure of the Mumba botnet means that going after the servers hosting the stolen data is now much more difficult than before,” said AVG senior vice president Yuval Ben-Itzhak .
AVG said that the Mumba botnet was created by one of the most sophisticated group of cybercriminals on the internet known as the Avalanche Group who perfected a mass-production system for deploying phishing sites and data stealing malware. Mumba uses the latest version of Zeus, currently one of the most common malwares.