All the latest UK technology news, reviews and analysis

Evolved Cridex cyber attack found with 50,000 stolen credentials

02 Jul 2014
Criminals are using Cridex malware to increase the size of botnets

Criminals are using a new form of the infamous Cridex malware to automatically increase the size of their botnet empire and target enterprise customers.

Seculert CTO Aviv Raff reported finding the evolved attack, codenamed Geodo, in a blog post, warning that the new malware has advanced self-spreading powers.

The attacks work using 50,000 stolen credentials to create and send automated emails with malicious attachments, which when clicked infect the victim machine and connect it to the criminal botnet.

"We were able to determine that the second piece of malware (the worm) is provided with approximately 50,000 stolen Simple Mail Transfer Protocol (SMTP) account credentials including the related SMTP servers to connect to. The bot then uses these credentials to target mostly German accounts by impersonating legitimate email," read the post.

"The command and control (C&C) provides the malware with a batch of 20 targeted email addresses. The malware is also given a from address, subject line and email body text unique to this particular batch of emails. Once the malware has run through the batch, it is provided with a new batch of 20 emails."

Cridex is a data-stealing worm that was first discovered in 2012. Raff said it is unclear where the credentials used in the new campaign came from, though it is likely they were stolen during attacks using the older Cridex version.

"There is no definitive information on where the 50,000 stolen credentials came from, but Cridex is the suspected culprit," he said.

"As a data stealer, Geodo can compromise the intellectual property of a corporation, putting its business and reputation at risk. This new email worm capability displayed by Geodo serves to further emphasise the growing threat of advanced malware to today's enterprises."

Cridex is one of many old attack tools to receive a technical upgrade in recent weeks. Researchers at F-Secure uncovered a fresh BlackEnergy hack campaign believed to be targeting European governments with a wave of spear-phishing emails masquerading as IT alerts in June.

  • Comment  
  • Tweet  
  • Google plus  
  • Facebook  
  • LinkedIn  
  • Stumble Upon  
Alastair Stevenson

Alastair has worked as a reporter covering security and mobile issues at V3 since March 2012. Before entering the field of journalism Alastair had worked in numerous industries as both a freelance copy writer and artist.

View Alastair's Google+ profile

More on Security
What do you think?
blog comments powered by Disqus

Devices at work poll

Which device do you use most for work?

Popular Threads

Powered by Disqus
LG G Flex 2 hands-on review

CES 2015: LG G Flex 2 video

A closer look at LG's latest curved-screen smartphone

Updating your subscription status Loading

Get the latest news (daily or weekly) direct to your inbox with V3 newsletters.

newsletter sign-up button

Getting started with virtualisation

Virtualisation can help you reduce costs, improve application availability, and simplify IT
management. However, getting started can be challenging


Converting big data and analytics insights into results

Successful leaders are infusing analytics throughout their organisations to drive smarter decisions, enable faster actions and optimise outcomes

Junior Java Developer - Java, 2D, 3D, Data visualisation, Scrum, S/W

Our client develops leading edge software for spatial...

Java Developer Spring (Senior) REST API

Java Developer / Senior Java Programmer (REST API Cloud...

Bespoke Apps Trainer/ Warrington / Contract

Our client, a large training and development company...

Extreme Network Engineer - Extreme / Routing / Switches

Extreme Network Engineer - Extreme / Routing / Switches...
To send to more than one email address, simply separate each address with a comma.