Hackers circulate thousands of FTP credentials, New York Times among those hit

A list of compromised FTP credentials is circulating in underground forums

Thousands of FTP servers have been compromised in an attack that, in some cases, saw hackers create links to the servers that redirected people to work-at-home schemes, such as in the case of the New York Times.

Thousands of FTP servers have been compromised in an attack that, in some cases, saw hackers create links to the servers that redirected people to work-at-home schemes, such as in the case of the New York Times.

Hackers are circulating credentials for thousands of FTP sites and appear to have compromised file transfer servers at The New York Times and other organizations, according to a security expert.

The hackers obtained credentials for more than 7000 FTP sites and have been circulating the list in underground forums, said Alex Holden, chief information security officer for Hold Security, a Wisconsin-based company that monitors cyberattacks.

In some cases, hackers used the credentials to access FTP servers and upload malicious files, including scripts in the PHP programming language. In other instances, they placed files on FTP servers that incorporate malicious links directing people to websites advertising work-at-home schemes and other scams.

An FTP server run by The New York Times was among those affected, and hackers uploaded several files to the server, Holden said.

Eileen Murphy, head of communications for the Times, said via email the company was "taking steps to secure" its network and could not comment further due to an investigation.

UNICEF, another organization whose credentials appear on the list, did not confirm it had been compromised but said it had disabled the FTP application in question, which it said was part of a system no longer in use.

UNICEF has been moving to a "more robust" content management platform and the organization uses third parties to check its infrastructure for vulnerabilities, spokeswoman Sarah Crowe said via email.

"It is therefore very rare for us to witness such a breach," she said.

Not all the credentials on the list are valid but a sampling showed that many of them work, said Holden, whose research credits include discovering large data breaches affecting the retailer Target and software vendor Adobe Systems.

Holden said he did not know the name of the group responsible for the FTP attacks.

The attackers may have obtained the credentials through malware installed on other computers at the affected organizations, he said. The passwords in many cases are complex, suggesting the hackers weren't merely guessing default credentials that had not been changed.

FTP servers are online repositories where people can upload and download files, and they're designed to be accessible remotely via login and password.

The default application for accessing FTP servers is usually a Web browser, which can log into an FTP site automatically if supplied with a link containing the proper credentials. Hackers could therefore embed links in spam emails, for example, and the name of a familiar company might give victims the confidence to trust a link and click on it.

In the case of The New York Times, one of the files uploaded to its FTP server was a .html file, Holden said. That file could be incorporated into a malicious link that could be used in a spam message, he said. If opened, the link would take a person to The New York Times' FTP server but then redirect them to another website advertising a work-at-home scheme.

Users need to be careful about opening links in emails even if they appear to be for legitimate domains, Holden said.

FTP applications can also be used to update files on a Web server, meaning hackers could potentially use the credentials to make changes to a company's website. It's hard to say how many of the FTP sites on the list are connected to Web servers, he said.

Several other companies whose FTP domains appear on the list could not be reached for comment.

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk

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Tags securitymalwaresonydata protectiondata breachThe New York TimesExploits / vulnerabilitiesunicefHold Security

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Jeremy Kirk

IDG News Service
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