A Hotmail user logged into their account this week to find that scammers had deleted all their e-mails except for one, which was from a hacker demanding cash in exchange for restoring the lost information, according to Websense.
Smaller companies should back up their data if they want to avoid being held to ransom by hackers, a security company has warned.
Symantec is readying a new security product designed to protect consumers as they do business online.
In another example of "ransomware," a new Trojan horse threatens to delete files unless the victim pays up, security experts have warned.
A Trojan making the rounds encrypts victims' files and demands a US$300 payment to have them decrypted and unlocked, according to a report by security firm Lurhq Threat Intelligence Group.
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