Equifax rival TransUnion also sends site visitors to malicious pages

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People visiting TransUnion’s Central American redirected to a potpourri of badness.

 

Equifax isn't the only credit-reporting behemoth with a website redirecting visitors to fake Adobe Flash updates. A security researcher from AV provider Malwarebytes said transunioncentroamerica.com, a TransUnion site serving people in Central America, is also sending visitors to the fraudulent updates and other types of malicious pages.

 

As Ars reported late Wednesday night, a portion of Equifax's website was redirecting visitors to a page that was delivering fraudulent Adobe Flash updates. When clicked, the files infected visitors' computers with adware that was detected by only three of 65 antivirus providers. On Thursday afternoon, Equifax officials said the mishap was the result of a third-party service Equifax was using to collect website-performance data and that the "vendor's code running on an Equifax website was serving malicious content." Equifax initially shut down the affected portion of its site, but the company has since restored it after removing the malicious content.

 

Now, Malwarebytes security researcher Jérôme Segura says he was able to repeatedly reproduce a similar chain of fraudulent redirects when he pointed his browser to the transunioncentroamerica.com site. On some occasions, the final link in the chain would push a fake Flash update. In other cases, it delivered an exploit kit that tried to infect computers with unpatched browsers or browser plugins. The attack chain remained active at the time this post was going live. Segura published this blog post shortly after this article went live on Ars.

 

"This is not something users want to have," Segura told Ars.

 

The common thread tying the affected Equifax and TransUnion pages is that both hosted fireclick.js, a JavaScript file that appears to invoke the service serving the malicious content. When called, fireclick.js pulls content from a long chain of pages, starting with those hosted by akamai.com, sitestats.com, and ostats.net. Depending on the visitors' IP address, browsers ultimately wind up visiting pages that deliver a fake survey, a fake Flash update, or an exploit kit.

 

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