Menu
Brute-force malware targets email and FTP servers

Brute-force malware targets email and FTP servers

Researchers find Fort Disco malware variants launching brute force password guessing attacks against POP3 and FTP servers

A piece of malware designed to launch brute-force password guessing attacks against websites built with popular content management systems like WordPress and Joomla has started being used to also attack email and FTP servers.

The malware is known as Fort Disco and was documented in August by researchers from DDoS mitigation vendor Arbor Networks who estimated that it had infected over 25,000 Windows computers and had been used to guess administrator account passwords on over 6,000 WordPress, Joomla and Datalife Engine websites.

Once it infects a computer, the malware periodically connects to a command and control (C&C) server to retrieve instructions, which usually include a list of thousands of websites to target and a password that should be tried to access their administrator accounts.

The Fort Disco malware seems to be evolving, according to a Swiss security researcher who maintains the Abuse.ch botnet tracking service. "Going down the rabbit hole, I found a sample of this particular malware that was brute-forcing POP3 instead of WordPress credentials," he said Monday in a blog post.

The Post Office Protocol version 3 (POP3) allows email clients to connect to email servers and retrieve messages from existing accounts.

The C&C server for this particular Fort Disco variant responds with a list of domain names accompanied by their corresponding MX records (mail exchanger records). The MX records specify which servers are handling email service for those particular domains.

The C&C server also supplies a list of standard email accounts -- usually admin, info and support -- for which the malware should try to brute force the password, the Abuse.ch maintainer said.

"While speaking with the guys over at Shadowserver [an organization that tracks botnets], they reported that they have seen this malware family bruteforcing FTP credentials using the same methodology," he said.

Brute-force password guessing attacks against websites using WordPress and other popular CMSes are relatively common, but they are usually performed using malicious Python or Perl scripts hosted on rogue servers, the researcher said. With this malware, cybercriminals created a way to distribute their attacks across a large number of machines and also attack POP3 and FTP servers, he said.


Follow Us

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 malwareintrusionarbor networksAccess control and authentication

Featured

Slideshows

Reseller News Platinum Club celebrates leading partners in 2019

Reseller News Platinum Club celebrates leading partners in 2019

The leading players of the New Zealand channel came together to celebrate a year of achievement at the annual Reseller News Platinum Club lunch in Auckland. Following the Reseller News Innovation Awards, Platinum Club provides a platform to showcase the top performing partners and start-ups of the past 12 months.

Reseller News Platinum Club celebrates leading partners in 2019
Reseller News hosts alumnae breakfast for Women in ICT Awards

Reseller News hosts alumnae breakfast for Women in ICT Awards

Reseller News hosted its second annual alumnae breakfast for the Women in ICT Awards in New Zealand, designed to showcase the leading female leaders in the industry. Held at The Cordis in Auckland, attendees came together to hear inspiring keynotes and panel discussions, alongside high-level networking among peers. Photos by Gino Demeer.

Reseller News hosts alumnae breakfast for Women in ICT Awards
Reseller News Innovation Awards 2019: meet the winners

Reseller News Innovation Awards 2019: meet the winners

Reseller News honoured the standout players of the New Zealand channel in front of more than 480 technology leaders in Auckland on 23 October, recognising the achievements of top partners, emerging entrants and innovative start-ups.

Reseller News Innovation Awards 2019: meet the winners
Show Comments