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Pushu Variant Spams Hotmail, Cracks Audio Captchas


A new version of Trojan-Pushu is doing some interesting stuff to bypass captchas used by Microsoft’s Hotmail/ webmail services in order to spam people with links to malicious Yahoo Groups pages. The three-year-old spy (known by a variety of other aliases, including Cutwail, Pushdo, Diehard, and Rabbit) has always been, primarily, a spam bot. In this case, however, the spy is not sending spam by connecting to open mail relays or more traditional means; It’s spamming through the Hotmail/ Web mail interface. Most interestingly, during the course of the spam sessions, the spy apparently pulls down “audio captchas” and successfully […]

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