Over the past few days, a new threat called Fireball malware has been spreading rapidly and has allegedly been installed on more than 250 million computer systems. An estimated 20% of corporate networks have been infected with the malware. 10% of infections are in India, 9.6% in Brazil, 6.4% in Mexico, 5.2% in Indonesia and 2.2% in the United States.
The new malware variant was discovered by security researchers at Check Point, who claim the malware campaign is “possibly the largest infection operation in history.”
Fireball malware targets web browsers and is used to manipulate traffic. Once infected, the end user is redirected to fake search engines, which redirect search queries to Google and Yahoo. Fireball malware is being used to generate fake clicks and boost traffic, installing plugins and new configurations to boost the threat actor’s advertisements.
The malware is also capable of stealing user information using tracking pixels and can easily be turned into a malware downloader. Once installed, Fireball malware can run any code on the victims’ computer, making the infection especially dangerous. While Fireball malware is not believed to be dropping additional malware at this stage, it remains a very real possibility. The malware has a valid certificate, hides the infection and cannot be easily uninstalled.
The malware is being distributed bundled with other software such as the Mustang browser and Deal WiFi, both of which are provided by a large Chinese digital marketing agency called Rafotech. It is Rafotech that is understood to be behind Fireball malware.
Rafotech is not using the malware for distributing other malware, nor for any malicious purposes other than generating traffic to websites and serving end users adverts, but Fireball may not always remain as adware. At any point, Fireball could simultaneously drop malware on all infected systems.
The recent WannaCry ransomware attacks serve as a good comparison. Once the network worm had spread, it was used to deploy WannaCry. More than 300,000 computers were infected the worm, which then dropped the ransomware. If a more advanced form of malware had been used that did not have a kill switch, the WannaCry attacks would have been far more severe. Now imagine a scenario where the same happened on 250 million computers… or even more as Fireball malware spreads further.
Fireball could also drop botnet malware onto those computers. A botnet involving 250 million or more computers would result in absolutely devastating DDoS attacks on a scale never before seen. As a comparison, Mirai is understood to include around 120,000 devices and has wreaked havoc. A botnet comprising 250 million or more devices could be used to take down huge sections of the internet or target critical infrastructure. It would be a virtual nuclear bomb.
A new report from RSA Security has revealed 40,000 subdomains linked to the Rig exploit kit have been taken down, which is just as well considering how many enterprises are failing to update Adobe Flash promptly and are still using vulnerable Flash versions.
Exploit kits such as Rig are used to probe for vulnerabilities in browsers and plugins, with several exploits loaded to the kit. When the EK finds an exploitable vulnerability, malware is silently downloaded. The Rig EK has previously been used to distribute a variety of malicious payloads including banking Trojans and Cerber ransomware.
While the news of the shutdown of tens of thousands of subdomains used by the Rig exploit kit is good news, this week has also seen some worrying news emerge.
A recent study conducted by Duo Security has revealed the reason why exploit kits are such an effective means of malware delivery. Enterprises are failing to update software and are still using vulnerable Flash versions and other out-of-date plugins, even though those plugins and software versions contain several critical vulnerabilities that are being actively exploited.
53% of Enterprise End Points Have Vulnerable Flash Versions Installed
The study involved an analysis of key indicators of device health on 4.5 million Windows computers, Macs, Android smartphones and Apple mobiles. In the security firm’s Trusted Access Report, it was revealed that 53% of enterprise end points were running outdated versions of Adobe Flash. Last year when a similar study was run, there were 10% fewer devices running outdated Flash versions.
Far from revealing enterprise computers to be one version out of date, 21% of devices were discovered to be running Flash version 220.127.116.11, released in January 2017. That version has 13 critical code execution vulnerabilities that were addressed in February, all of which had the most severe rating for Windows, MacOS and Chrome.
Keeping up to date with the latest software releases can be difficult. New versions of software and plugins are frequently released to correct known flaws and many IT security professionals suffer from update fatigue. Updates are often delayed as a result, but that leaves the door open to cybercriminals.
Update Software and Block Malicious Domains
To protect against exploit kits and malicious downloads, organizations should ensure software versions are kept 100% up to date, especially browsers and browser plugins. It is a tiresome, never ending process, but failure to update promptly leaves organizations vulnerable to attack.
To ease the pressure on IT departments, an additional control can be implemented to block access to malicious websites containing exploit kits.
WebTitan is a web filtering that prevents downloads of malicious files by blocking access to malicious websites. Links to malicious sites are often sent in spam email, the clicking of which directs users to webpages hosting exploit kits. WebTitan blocks these links preventing the sites from being accessed. WebTitan can also be configured to prevent malicious file downloads and malvertising redirects, further protecting organizations from attack.
For full details on the capabilities of WebTitan, advice on web filtering and to register for a free 30-day trial of WebTitan, contact the TitanHQ team today.