Along with the vulnerabilities that Microsoft patched Tuesday, the software giant's customers have a new problem to grapple with: a fake notification e-mail that looks remarkably legitimate.

Attackers are apparently taking advantage of Microsoft's Patch Tuesday to send legitimate-looking e-mails that include a Trojan virus. Trojan.Backdoor.Haxdoor allows attackers to execute files and steal information from compromised computers. The fake mailing includes a legitimate-looking PGP signature, as well as purporting to come from a real Microsoft employee.

Scammers are exploiting meltdown in the banking sector in an attempt to trick users into handing over sensitive financial information.

Phishing emails commonly pose as security checks from a prospective mark's bank. The latest generation of the scam imitates communiques about bank mergers.