Three delinquents were arrested in Hanoi on May 14 on charges of appropriation of private assets via the internet.
The young men, all born in 1990, are originally cyber-security staff.
Le Van Nguyen initiated the gang into criminal activities after successfully attacking the host computer system at a game station.
The ring carried out their cyber fraud by taking control of 48,113 bank credit profiles stored in two websites, of which 34,000 counts of private information were sold for more than VND400 million(US$18,605).
The case is under further investigation.