Security experts today warned of a newly discovered attack in which hackers
encrypt data on a compromised PC and demand payment for the decryption key.
The attacks typically start when a user with an improperly patched version of
Internet Explorer visits a web page containing malware that downloads a Trojan.
This encodes all files on the local hard drive, as well as any network drives
it can reach, and opens a message such as: 'Decoder costs $2000. Send $2000 to
e-gold account. Send message about it and I send program to your email.'
Web monitoring firm
Websense said
in its twice-yearly report on web security that it first came across attacks of
this kind in May, but did not say whether any companies have paid for the
decryption tool.
A PDF of the Websense report can be downloaded
here.
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