Cyber blackmail artists are targeting office workers by threatening to delete computer files or install pornographic images on their work PCs unless they pay a ransom.
The extortion scam, which is believed to have surfaced a year ago, indiscriminately targets anyone on the corporate ladder with a PC connected to the Internet.
It usually starts with a threatening e-mail in which the author claims to have the power to take over a worker's computer through an exploit in the corporate network, experts said.
The e-mail typically contains a demand that unless a small fee is paid - at first no more than $20 or $30 - they will attack the PC with a file-wiping program or download onto the machine images of child pornography.
"They prey on the nice secretary who wouldn't do anything wrong. When she gets one of these e-mails she thinks 'Oh, my goodness what am I going to do?' So she puts it on her credit card and transfers the funds to the (suspect's online bank) account and hopes it goes away," a British detective specialising in cyber-crime told Reuters.
The officer advised against co-operating with the fraudsters. "If a person pays up, say it's just 20 euros, then they have identified a soft target. They may come back for more, next time demanding more money."