FileZilla warns of large malware campaign

Tampered versions of the FTP program steal login credentials

FileZilla is warning that versions of its open-source application have been modified by hackers to steal login credentials.

FileZilla is warning that versions of its open-source application have been modified by hackers to steal login credentials.

Spoofed versions of the popular file transfer program FileZilla that steal data are circulating on third-party websites, the organization behind the software said Tuesday.

FileZilla is an open source application, and hackers have taken its source code and modified it in order to try to steal data for more than a decade. But this campaign, run on third-party websites, is one of the largest FileZilla has seen to date, it said.

"We do not condone these actions and are taking measures to get the known offenders removed," FileZilla said.

The organization said it is difficult to prevent tainted versions of its software "since the FileZilla Project promotes beneficial redistribution and modifications of FileZilla in the spirit of free open source software and the GNU General Public License."

The security vendor Avast found that the modified versions are nearly identical to the legitimate application. The icons, buttons and images are the same, and the malware version of the ".exe" file is just slightly smaller than the real one, Avast wrote on its blog.

Inside the tampered FileZilla versions, Avast found code that steals login credentials for servers users are accessing. The username, password, FTP server and port are encoded using a custom base64 algorithm and sent to the attacker's server, according to Avast.

"The whole operation is very quick and quiet," Avast wrote.

The stolen data goes to a server in Germany. The same IP address of that server hosts three other domains registered through Naunet.ru, which Avast wrote "is associated with malware and spam activities."

FileZilla recommended its application be downloaded only from its website or SourceForge, one of its distribution partners. It also recommended to check the SHA-512 hashes of the unmodified version of FileZilla's installer and executable, which it has published on its blog.

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

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags securitydata breachdata protectionmalwareFileZilla

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Jeremy Kirk

IDG News Service
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

David Coyle

Brother PocketJet PJ-773 A4 Portable Thermal Printer

I rate the printer as a 5 out of 5 stars as it has been able to fit seamlessly into my busy and mobile lifestyle.

Kurt Hegetschweiler

Brother PocketJet PJ-773 A4 Portable Thermal Printer

It’s perfect for mobile workers. Just take it out — it’s small enough to sit anywhere — turn it on, load a sheet of paper, and start printing.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?