Polyfill attack redirected victims to gambling sites to carry out supply chain attack

More specifications person emerged surrounding FUNNULL, nan institution that bought nan Polyfill.io work and utilized it to motorboat a awesome proviso concatenation attack?

New investigation claims nan work is now being utilized arsenic portion of an tremendous money-laundering strategy that involves tens of thousands of clone gambling sites for Chinese victims.

Security researchers Silent Push published a caller report claiming to person mapped retired a web of 40,000 Chinese gambling sites, propped up by FUNNULL, and redirected to utilizing Polyfill. In its attack, FUNNULL impersonated a twelve brands from nan gambling industry, and utilized much than 200,000 unsocial hostnames, 95% of which were created utilizing Domain Generation Algorithms.

No workaround

Polyfill.io grants modern functionalities connected older browsers, allowing web developers to usage modern web standards without worrying astir compatibility. The service, and accompanying domain, was acquired February 2024 by a little-known institution called FUNNULL. Subsequent investigation has shown that nan institution is of Chinese origin, and astir apt wholly clone and non-existent.

When FUNNULL acquired Polyfill, its original developers urged nan users (approximately 100,000 websites) to extremity utilizing it immediately, and spell for safe alternatives (both Cloudflare and Fastly propped up morganatic mirrors astatine nan time).

In June 2024, cybersecurity experts from Sansec warned that polyfill was serving malware. "This domain was caught injecting malware connected mobile devices via immoderate tract that embeds cdn.polyfill.io," Sansec said astatine nan time. Google besides chimed in, notifying affected advertisers astir their landing pages now perchance redirecting visitors distant from their intended destination, and towards perchance malicious websites.

Earlier this week, information researchers from Silent Push published a caller report, claiming to person mapped retired a web of 40,000 Chinese gambling sites, propped up by FUNNULL, and redirected to utilizing polyfill.

In its attack, FUNNULL impersonated a twelve brands from nan gambling industry, and utilized much than 200,000 unsocial hostnames, 95% of which were created utilizing Domain Generation Algorithms.

The websites were astir apt utilized for money laundering, and different schemes, pinch Silent Push believing FUNNULL is straight linked to nan Lazarus Group, a notorious North Korean state-sponsored threat character that’s known for targeting cryptocurrency users.

Via TechCrunch

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