From gbhackers.com
A financially motivated hacking group called ” Magecart Group 5 (MG5) “targeting high-end commercial-grade layer 7 (L7) WiFi routers and take taking control over the public Wi-Fi networks that deployed in airports, casinos, hotels, and resorts.
Threat actors initiate the attack by injecting malicious code into the legitimate Javascript file that loaded by the layer 7 (L7) routers.