A massive data breach attack against e-commerce giant Coupang Inc. that has affected over 30 million customers' data lasted from June to November, according to officials Tuesday.

Coupang, dubbed the Amazon.com of South Korea, is the country's top online retailer with its services ubiquitous for many Koreans using its "Rocket" fast deliveries.

Coupang, South Korea's equivalent of Amazon.com, is the latest major company in the country to suffer a breach.