A new form of phishing scheme using voice-over IP (VoIP) technologies has been identified and blocked by messaging security solutions providers Cloudmark, according to the group\u2019s April 25 release.In this new form of phishing, perpetrators send their targets e-mails purporting to come from legitimate banks or other financial institutions, informing them that there is a problem with their account and instructing them to call the phone number provided within the e-mail. If users are duped into calling the number, they\u2019re connected to a private branch exchange via VoIP where messages are played that sound exactly like recordings from victims\u2019 banks. After identifying themselves as the appropriate banks or institutions, the phone systems then request sensitive user information like PINs and account numbers, according to Cloudmark.\u201cWe\u2019ve seen two separate VoIP attacks hit our network this week, the first we\u2019ve been able to analyze in detail. In these attacks, the targets receive an e-mail, ostensibly from their bank, telling them there is an issue with their account and to dial a number to resolve the problem,\u201d said Cloudmark\u2019s Senior Research Scientist Adam J. O\u2019Donnell. \u201cThe result can be personally and financially devastating.\u201dCloudmark says VoIP phishing scams are potentially more dangerous than typical phishing schemes because they\u2019re cheaper to perpetrate and more difficult to trace, due to the fact that phishers can add and cancel VoIP phone numbers very easily, according to Cloudmark.The Cloudmark Collaborative Security Network first detected and started blocking the attacks last week using \u201cfingerprinting\u201d algorithms that can identify the phone numbers employed in the schemes.Cloudmark advises any individual who receives an e-mail like the ones described above not to call any phone numbers within the message before verifying them against the numbers on their ATM cards or with the actual banks, and to notify their service providers.For related news coverage, read Wells Fargo, AOL to Join Symantec Antiphishing Initiatives.Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.