Malicious Ads in Search Results Are Driving New Generations of Scams

source: wired.com (contributed by Artemus founder, Bob Wallace)  |  image: pixabay.com

The scourge of “malvertising” is nothing new, but the tactic is still so effective that it’s contributing to the rise of investment scams and the spread of new strains of malware.

MALICIOUS DIGITAL ADVERTISEMENTS and “SEO poisoning” that gets those ads to prime spots in search results have been mainstays of the digital scamming ecosystem for years. But as online crime evolves and malicious trends like “pig butchering” investment scams and infostealing malware proliferate, researchers say that so-called “malvertising” is still a key technique for scammers—and still a growing problem.

Instances of malvertising in the US were up 42 percent month-over-month in fall 2023 and increased another 41 percent from July to September of this year, according to data from the security firm Malwarebytes. The company says that scammers typically cycle through the advertising accounts used for malvertising quickly, and 77 percent of the accounts are only used once. The bulk of the activity, though, traces back to South Asia and Southeast Asia, Malwarebytes says, with 90 percent of the ad fraud coming from Pakistan and Vietnam, according to the researchers’ telemetry. But as with many components of the digital crime ecosystem, malvertising is often offered as a service where cybercriminals from around the world can purchase ads that distribute their malware or lead potential victims to a malicious website of their choosing.

Jérôme Segura, senior director of threat intelligence at Malwarebytes, emphasizes that a particularly effective place for potential victims to encounter malicious ads is in search results, where sponsored marketing content gains legitimacy just by showing up on the same page as legitimate search results. Such malicious ads can even end up getting prime placement in the layout of search results.

“Scammers are using the power of internet and advertising technology, which allows really immense targeting of the right victim. They can get the right ad with the right intent in front of them at the right time,” Segura says. “The fact that scammers are continuing to spend money on advertising shows that these scams are working and they’re getting a return on their ad spend.”