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!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags malwaredata protectionFileZilla

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

Cool Tech

Toys for Boys

Skywatcher Dobsonian 8″ Collapsible Telescope

Learn more >

Family Friendly

Whodunnit™ Duo-Scope MFL-007 Microscope Kit

Learn more >

Stocking Stuffer

Logitech Ultimate Ears Wonderboom 2 Bluetooth Speaker

Learn more >

Christmas Gift Guide

Click for more ›

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Tom Sellers

MSI P65

This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang

MSI GT76

It really doesn’t get more “gaming laptop” than this.

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Aysha Strobbe

Microsoft Office 365/HP Spectre x360

Microsoft Office continues to make a student’s life that little bit easier by offering reliable, easy to use, time-saving functionality, while continuing to develop new features that further enhance what is already a formidable collection of applications

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?