Category Archives: Latest Warnings

Where Did That Scammer Get Your Email Address?

April 25, 2011

You’ve seen the emails: They purport to have been sent by some dethroned prince in a faraway land, or from a corrupt bureaucrat in an equally corrupt government. Whatever the ruse, they always claim to need your help in spiriting away millions of dollars. These schemes, known as “419,” “advance fee” and “Nigerian letter” scams, have been around forever and are surprisingly effective at duping people. But where in the world do these scammers get their distribution lists, and how did you become a target?

Some of the bigger spammers rely on bots that crawl millions of Web sites and “scrape” addresses from pages. Others instead turn to sellers on underground cybercrime forums. But as it turns out, there are still a handful of open-air markets where lists of emails are sold by the millions. If you buy in bulk, some you can expect to pay about a penny per 1,000 addresses.

One long-running, open air bazaar for email addresses is LeadsAndMails.com, which also goes by the name BuyEmails.org. This enterprise is based out of New Delhi, India, and advertises its email lists as “100% optin and 100 percent legal to use.” I can’t vouch for the company’s claims, but one thing seems clear: A good number of its clients are from Nigeria, and many of them are fraudsters.

Time to Patch Your Flash

April 15, 2011

If it seems like you just updated your Flash Player software to plug a security hole that attackers were using to break into computers, you’re not probably not imagining things: Three weeks ago, Adobe rushed out a new version to sew up a critical new security flaw. Today, Adobe issued a critical Flash update to eliminate another dangerous security hole that criminals are actively exploiting.

This new update addresses a vulnerability first detailed here at KrebsOnSecurity.com on Tuesday, and Adobe deserves credit for responding quickly with a patch. But there are few things that are simple about updating Flash, which ships in a dizzying array of version numbers and for many users must be deployed at least twice to cover all browsers. In addition, users may have to uninstall the existing version before updating to guarantee a trouble-free install. Also, Adobe Air will need to be updated if that software also is already installed. Finally, fixing this same vulnerability in Adobe Reader and Acrobat will require installing another patch, which won’t be out for at least another 10 days.

IRS Scam: Phishing by Fax

March 29, 2011

Scammers typically kick into high gear during tax season in the United States, which tends to bring with it a spike in phishing attacks that spoof the Internal Revenue Service. Take, for example, a new scam making the rounds via email, which warns of discrepancies on the recipient’s income tax return and requests that personal information be sent via fax to a toll-free number.

Microsoft Hunting Rustock Controllers

March 28, 2011

Who controlled the Rustock botnet? The question remains unanswered: Microsoft’s recent takedown of the world’s largest spam engine offered tantalizing new clues to the identity and earnings of the Rustock botmasters. The data shows that Rustock’s curators made millions by pimping rogue Internet pharmacies, but also highlights the challenges that investigators still face in tracking down those responsible for building and profiting from this complex crime machine.

Critical Security Updates for Adobe Acrobat, Flash, Reader

March 21, 2011

Adobe today released a software update to plug a critical security hole in its Flash Player, Adobe Acrobat and PDF Reader products. The patch comes a week after the software maker warned that miscreants were exploiting the Flash vulnerability to launch targeted attacks on users.

The Flash update address a critical vulnerability in Adobe Flash Player version 10.2.152.33 and earlier versions (Adobe Flash Player version 10.2.154.18 and earlier versions for Chrome users) for Windows, Macintosh, Linux and Solaris operating systems, Adobe Flash Player 10.1.106.16 and earlier versions for Android.

Rustock Botnet Flatlined, Spam Volumes Plummet

March 16, 2011

The global volume of junk e-mail sent worldwide took a massive nosedive today following what appears to be a coordinated takedown of the Rustock botnet, one of the world’s most active spam-generating machines.

For years, Rustock has been the most prolific purveyor of spam — mainly junk messages touting online pharmacies and male enhancement pills. But late Wednesday morning Eastern Time, dozens of Internet servers used to coordinate these spam campaigns ceased operating, apparently almost simultaneously.