Security researchers from antivirus vendor Kaspersky Lab warn that My Opera is being abused by hackers, after they found a botnet script hosted on its servers.
"There have been several reports about malware hosted on Mozilla and Google code servers. Now we also found malware hosted on My Opera community servers
," Dmitry Bestuzhev, a Kaspersky Lab expert, writes
on the company's blog.
My Opera is both a social network and support website for Opera users. The service has an estimated 5 million users and every account gets 2 GB of file storage.
As with many other free Web or file hosting services, this offers a place for cybercriminals to serve their malware from without having to pay for bandwidth.
Another reason why free hosting providers with millions of users are preferred, is because they are slow in responding to the large amount of abuse complaints.
According to Kaspersky's statistics, FileAve.com is currently the service hosting most malware (43%). It is followed by Ripway with 18% and RapidShare with 13%.