Posts Categorized: adware


Modified Websites Pushing Trojans On the Rise

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For the past couple of weeks, owners of Web sites have been hit with a wave of attacks that surreptitiously infect unsuspecting visitors with a wide variety of malware types. The first wave inflicted rogue antivirus on unlucky victims, but late last week victims who visited infectious sites were redirected into a drive-by download site that pushes clickers onto a vulnerable visitor’s computer. The affected web sites have been modified to add malicious, obfuscated Javascript code to the footer of each page. Some Web hosts are trying to notify customers or fix the problems. At first, the problem affected sites […]

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Fakealerts: Building a Better Mousetrap

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In general, the use of fakealerts – those bogus warnings that look like your PC has started some sort of antivirus scan on its own, then predict imminent doom if you don’t buy some snake oil product right this minute — is on the rise. Fakealerts constitute a particularly effective social engineering trick, earning the makers of bogus, ineffective “antivirus” programs millions of dollars (and the scorn of victims) in the process. So it should come as no surprise that the fakealerts themselves have gone through some technological advances in the past year. In the past few months, the fakealert-makers […]

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Rogues Mug Big Bird on his Birthday

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In a move sure to raise the ire of Sesame Street fans everywhere, the black hat SEO gangs that have been manipulating Google results for the better part of the year have seized on a new target from which they’ve launched their current salvo of rogue antivirus guano. That’s right, the lovable, giant jaundiced avian friend to child and adult alike is being used to hijack searches and rope unsuspecting users into a vortex of popups and fake scans. They have besmirched Big Bird. And on his birthday, of all days. Have the rogue AV purveyors no shame? Actually, they’ve […]

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Trojan Decodes Captchas Using Stolen Commercial Tools

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A new Trojan quietly circulating in the wild uses components from a commercial optical character recognition (OCR) application to decode captchas, those jumbled-text images meant to help a website discern human activity from automated bots. The OCR-using captcha breaking tool is just one component of the Trojan. Its main purpose appears to be to fill out contest entries, online polls, and other forms relating to marketing campaigns originating in the US, and it uses the OCR-cracking software in order to read the captchas and submit the form entries, on pages where the website presents a captcha to the user. And […]

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Rogues Impersonate Google, Firefox Security Alerts

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In the past week, we’ve begun to see new fakealerts — those disturbingly effective, entirely bogus “virus warning” messages — that appear to impersonate the appearance and text of legitimate warning dialogs you might see while surfing with the Firefox browser, or searching Google. The dialog, in a stern, red dialog box on a gray background, reads “Warning! Visiting this site may harm your computer!” — a dialog that appears to be designed to evoke the look of a Google’s Safe Browsing advisory as displayed in Firefox. Cast as a kind of split between a warning message and a clickwrap […]

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More Malware Trades on Tawdry Searches

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By now, you’ve most likely heard about how an ESPN reporter was victimized, and that a surreptitiously recorded video was distributed online. You may also have read that malware distributors were taking advantage of the high level of interest in this video to rapidly disseminate malware by convincing people to click links to malicious Web sites, including a fake CNN lookalike site, to watch said tawdry video. Well, that first wave of malware was almost identical to the distribution we saw when Farrah Fawcett died a few weeks ago. Web surfers were urged to click a link to download a picture […]

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AutoCAD Adware Trojans Target Techies

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Every once in a while, you hear whispers or rumors about specially-crafted, targeted malware designed to steal a specific piece of data from a particular victim. The data thieves, in these limited cases, tend to be clever, thoughtful, and methodical in both the creation and deployment of their creations. Rarely do malware researchers encounter these files. But it does happen occasionally, and I thought I had stumbled upon one of these kinds of spies a few weeks ago. It’s a peculiar Trojan horse which has been written not as a standard Windows application, but as an ObjectARX application — an […]

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Jackson/Fawcett Malware is Extortion-ware

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As I reported yesterday, searches for information about the deaths of Michael Jackson or Farrah Fawcett were turning up links to malware. This came as no surprise to anyone, though the speed with which the links spread was astonishing: Within minutes of the first confirmation that Jackson had succumbed to a heart attack, the first malicious blog posts began popping up in search results. We’re continuing to monitor hundreds of malicious sites touting news of Jackson’s demise — and new malicious blogs are coming up as fast as the blog services can shut them off. The first site we encountered […]

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Adware client tags you as its pitchman

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Over the past week, someone has been spamming the file sharing site ThePirateBay.org with comments advertising a new “product” called BittorrentBooster. According to the site’s administrators, the spammer used a large number of fraudulently registered accounts to post the messages as feedback, attached to hundreds, possibly thousands, of downloadable .torrent files, which file-sharers use to initiate a peer-to-peer download session. I decided to take a closer look, because the product’s claims — to be able to give file-sharers a massive speed boost during the “leeching” (or, downloading) phase of their torrent session — sounded pretty implausible. Impossible is more like […]

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April 2009 wrapup: Thumbdrives under threat

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We’ve just tallied the top 10 threats Webroot’s consumer products detected during the month of April, and some interesting trends appear to be shaping up. Conficker aside, the first quarter of 2009 seemed to be dominated by worms that spread not only over a network, but to virtually anything you can plug into a USB port to store files. Thumbdrives and portable hard drives immediately come to mind, but so do  MP3 players, digital picture frames and memory cards — like the kind you’d use in cameras, cellphones, or videogame players. April proved to be no different. It’s very much a case of what’s old is […]

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