The number of stolen payment card details collected from South Korea has soared over the past two months. In June, researchers noticed 230,000 records peddled around, an abnormal increase from 42,000 seen in May. The origin of the compromise remains unknown at this time, but the data is from card-present transactions at numerous businesses in the country. Researchers at Gemini Advisory monitoring card-related activities on cybercriminal forums say that South Korean payment records were in low demand last year as the crooks had a large supply available. This changed in 2019 when the supply remained the same but demand increased.
Source: https://www.bleepingcomputer.com/news/security/1m-payment-card-details-from-south-korea-sold-on-the-dark-web/