Malvertising Campaign Delivers Millions of Bad Ads

Minimalist · Jul 30, 2018

By using the HiBids advertising platform, cyber-criminals have been delivering malicious advertisements to millions of victims worldwide in a large-scale malvertising and banking Trojan campaign, according to researchers at Check Point.

These malicious ads can infect the PC or mobile device of the person viewing the ads with malware, such as a crypto-miner, ransomware or a banking Trojan. Master134, the criminal reported to be responsible for the campaign, redirected stolen traffic from over 10,000 hacked WordPress sites, then sold it to Adsterra, the real-time bidding (RTB) ad platform, according to today’s blog post.
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https://www.infosecurity-magazine.com/news/malvertising-campaign-delivers/

guest · Sep 6, 2018

Blockers Alone Won't Cure Malvertising Woes
September 6, 2018
https://www.infosecurity-magazine.com/news/blockers-alone-wont-cure/

The Media Trust has discovered that cybercriminals have found new ways to bypass those blocker defense solutions and execute their malicious code, while staying under the radar of security teams.

These commercial blocking solutions use scripts designed to detect and obstruct malicious domains and are often installed in a content delivery network. Researchers found that ad blockers might not be the complete solution to the malvertising problem.

“Recently, The Media Trust Digital Security & Operations (DSO) team prevented bad ads from executing on a publisher’s website, protecting their audience of 900,000 per week from infection,” Chris Olson, CEO, The Media Trust wrote in a blog post.

"[...] One technique used in about 90% of mobile redirects is obfuscation – padding malware code with more code so blockers can’t recognize it. When malware is obfuscated, blockers fail to detect and thwart them.”
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Minimalist · Nov 27, 2018

How to Defend Against Malvertising Drive-By Attacks

Many longtime internet users will remember receiving pop-up ads warning that their computers were infected with a virus. In nearly all cases, the ad’s specific claims were bogus; the purpose was to scare users into paying for a questionable tech support service or to drive them to a site that would actually infect them with malware.

While browser-based pop-up blockers have largely killed off that particular scam, malicious advertising — or malvertising — is still causing serious damage. Purveyors of malvertisements use an increasingly broad range of techniques to insert malware into ads that run across the web on large advertising networks.
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https://securityintelligence.com/how-to-defend-against-malvertising-drive-by-attacks/

Minimalist · Jan 21, 2019

What Can Consumers and IT Decision-Makers Do About the Threat of Malvertising?

If you haven’t already heard of malvertising, it’s one of the latest portmanteaus you’ll hear more about in 2019. Malvertising, or malicious advertising, is a type of online attack in which threat actors hide malicious code within an advertisement as a means to infect systems with malware. It works like any other type of malware, but can be found in ads across the internet — even legitimate websites such as The New York Times and BBC.

While these attacks have been around for several years, the rate at which they’re increasing is escalating, and the threat to the enterprise is getting more challenging to diagnose.
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https://securityintelligence.com/wh...n-makers-do-about-the-threat-of-malvertising/

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