In the complexities of ever-evolving cyber threats, 2023 has seen the revival of a harmful malicious advertisement, known as "Malvertising".
This evil plan focuses on businesses to escape the conventional security firewalls and access the company data.
PikaBot stands at the front lines of this digital attack, a malware that innovatively exploits the reach of Google Ads to access the firewalls of corporate networks.
Spam to Search Engines: A Sinister Ballet
PikaBot's covert voyage started in the murky world of email spam campaigns that the infamous threat actor TA577 was running. But when the QakBot botnet was taken down, PikaBot's strategy changed, and it entered a new field. It’s the misleading environment of search engine advertisements passing for legitimate applications, like the popular AnyDesk.
By using advanced methods like indirect syscalls, this virus infiltrates legitimate processes. As a result, this method makes it a cunning and powerful foe. The malicious nature of PikaBot is more complex than just the initial download. The method of delivery composes an obfuscation symphony by:
- Tracking URLs that are hidden within highly respectable marketing platforms, redirecting all the users to customized domains for IP address concealment.
- Before revealing the harmful payload, spoof pages that impersonate well-known programs like AnyDesk trick users into following a misleading path.
Revealing the Malvertising Environment
The subtle complexities of PikaBot are reminiscent of previous attempts at malvertising that targeted Slack and Zoom. Similar redirection techniques and URL patterns have been found by researchers, suggesting the possibility of a “malvertising as a service” model in which threat actors use highly skilled deception tools.
PikaBot's comeback is a hint of a worrying trend: drive-by downloads are back but under a more sophisticated cover. In contrast to the past, when exploit kits and hacked websites were common, modern attacks take advantage of our reliance on search engines to transmit malware straight to our screens.
This is a clear warning to companies to go beyond conventional perimeter protection. Creating safe application repositories and encouraging employees to be vigilant about the internet are essential defenses against the impending menace of malvertising.
Important elements of this ongoing digital warfare include the detection and interception of installers infected with PikaBots and the proactive reporting of harmful adverts to digital gatekeepers.