Pornhub malvertising attack affects millions of users

Malvertising incidents are also expanding to whitelisted websites, expert warns

A large-scale malvertising attack saw millions of users of adult video website Pornhub tricked into installing malware on the computers, according to security researchers.

The campaign was active for more than a year, exposing millions of potential victims in the US, Canada, the UK, and Australia to fake software updates that actually installed malware, said IT security researchers at Proofpoint in a blog post

Advertisement - Article continues below

The attacks were carried out by a hacking group known as KovCoreG. It is best known for distributing Kovter ad fraud malware and sitting atop the affiliate model that distributes Kovter more widely.  

Victims were shown fake notifications of updates to their Chrome or Firefox web browser or Flash. When a file was downloaded, it installed Kovtar. This then was used by criminals to fake click on adverts. However, these clicks made money for criminals. 

"The combination of large malvertising campaigns on very high-ranking websites with sophisticated social engineering schemes that convince users to infect themselves means that potential exposure to malware is quite high, reaching millions of web surfers," said the researchers. 

"Once again, we see actors exploiting the human factor even as they adapt tools and approaches to a landscape in which traditional exploit kit attacks are less effective."

Advertisement
Advertisement - Article continues below

While the payload here is ad fraud malware, it could just as easily have been ransomware, an information stealer, or any other malware. 

Advertisement - Article continues below

"Regardless, threat actors are following the money and looking to more effective combinations of social engineering, targeting, and pre-filtering to infect new victims at scale," they added. 

Pornhub, which has its own bug bounty programme, acted swiftly to fix the issue when Proofpoint made it aware of the issue.

Chris Olson, CEO of The Media Trust, told IT Pro that the widespread notion that malvertising is on the decline just isn't true, and that it's even extending to websites you'd be happy to visit at work. 

"In fact, malvertising incidents have more than doubled in the past three years and are increasingly found on premium websites that are typically whitelisted by enterprises for employee internet use," he said. 

"Fake virus alerts and system updates delivering malicious exploit kits are ubiquitous in today's highly complex and dynamic digital ecosystem. In order to effectively deliver malware and exploit kits, threat actors have resorted to sophisticated coding to enable advanced filtering," he added.

Advertisement - Article continues below

"There has been a surge in the detection-evading malware that only executes when conditions are favourable. Furthermore, in order to accurately target and deliver malware to specific endpoints and internet users, threat actors exploit the very technologies that website owners utilise to deliver customised and personalised content to their users."

Featured Resources

Successful digital transformations are future ready - now

Research findings identify key ingredients to complete your transformation journey

Download now

Cyber security for accountants

3 ways to protect yourself and your clients online

Download now

The future of database administrators in the era of the autonomous database

Autonomous databases are here. So who needs database administrators anymore?

Download now

The IT expert’s guide to AI and content management

Your guide to the biggest opportunities for IT teams when it comes to AI and content management

Download now
Advertisement

Recommended

Visit/security/malware/355093/evasive-malware-threats-are-surging
malware

Evasive malware threats doubled in 2019

24 Mar 2020
Visit/security/malware/28083/the-five-best-free-malware-removal-tools
Security

Best free malware removal tools 2019

2 Mar 2020
Visit/antivirus/28144/best-antivirus
antivirus

Best antivirus for Windows 10

3 Sep 2019

Most Popular

Visit/mobile/mobile-phones/355239/microsofts-patent-design-reveals-a-mobile-device-with-a-third-screen
Mobile Phones

Microsoft patents a mobile device with a third screen

6 Apr 2020
Visit/server-storage/servers/355254/a-critical-flaw-in-350000-microsoft-exchange-remains-unpatched
servers

A critical flaw in 350,000 Microsoft Exchange remains unpatched

7 Apr 2020
Visit/software/video-conferencing/355257/taiwan-first-country-to-ban-zoom-amid-security-concerns
video conferencing

Taiwan becomes first country to ban Zoom amid security concerns

8 Apr 2020