If you get an email message telling you a hotel has erroneously charged your credit card account, be careful. The odds are that it's part of a new spam campaign that could infect your computer.
The messages started popping up in recent days and there are already hundreds of variants on the same theme: A hotel wrongly charged a credit card number and the victim is supposed to fill out an attached form to process the refund. "Please see the attached form. You need to fill it out and contact your bank for return of funds," read one such message, titled "Hotel Breakers Palm Beach made wrong transaction."
The 'refund' form is actually a malicious Trojan horse program that installs fake antivirus software on the victim's computer. The messages seem to be coming from the same botnet of infected computers that recently sent out similar messages warning victims that their credit card payments were overdue. Those messages led to the fake antivirus downloads too.
It's standard operating procedure for spammers to alter their messages now and then to trick new victims. But any unsolicited message that includes an attachment should always be treated as suspicious.
Consumers who aren't sure whether these messages are legitimate should use Google to find the company's website and then call them, security experts advise.
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