FUNNULL used the domain to essentially carry out a supply chain attack.
Researchers at Silent Push say they mapped out a network of thousands of Chinese gambling sites and linked it to FUNNULL.
FUNNULL was using its access to Polyfill.io to inject malware and redirect website visitors to that malicious network of casino and online gambling sites.
Around 40,000 mostly Chinese-language websites hosted by FUNNULL are identified which appeared to impersonate online gambling and casino brands including Sands, the Grand Lisboa in Macau, and online gambling portals Bet365 and Bwin.
FUNNULL is operating what appears to be one of the largest online gambling rings on the internet.
FUNNULL claims to have “more than 30 data centers on the continent”, likely referring to mainland China.
The suspicious network of sites is hosted on FUNNULL’s content delivery network with office addresses in Canada, Malaysia, the Philippines, Singapore, Switzerland and the United States.
FUNNULL could have launched much more dangerous attacks, but they were apparently trying to monetize a network of spammy sites.
These kinds of supply chain attacks are increasingly possible because the web is now a complex global network of websites that are often built with third-party tools.
ACB Group claimed to own FUNNULL on an archived version of its official website, which is now offline.