Group-IB, a Singapore-based cybersecurity company that specializes in preventing cyberattacks, has detected a massive upload of debit and credit card records mostly related to the largest Turkish banks on one of the most popular underground cardshops. More than 460,000 records in total were uploaded between Oct. 28 and Nov. 27. The underground market value of the database is estimated at more than $0.5 million. Upon discovery of this database, Group-IB has informed proper local authorities about the sale of the payment records, so they could take necessary steps.
Using its own unique tools for underground forums and cardshops monitoring, research and analysis Group-IB Threat Intelligence team has discovered that compromised payment records predominantly related to TOP 10 Turkish banks were uploaded in four parts to Joker’s Stash — one of the most popular underground cardshops. The first two databases named «TURKEY-MIX-01 (FRESH SNIFFED CVV) 30.000 cards TURKEY MIX, HIGH VALID 85-90%, uploaded 2019-10-28 (NON-REFUNDABLE BASE)» and «TURKEY-MIX-02 (FRESH SNIFFED CVV) 30.000 cards TURKEY MIX, HIGH VALID 85-90%, uploaded 2019-10-28 (NON-REFUNDABLE BASE)» went on sale on 28.10.2019 and had 60,000 pcs. All the cards in these two parts were sold at 3$ each.
The two other parts of the database under the names «TURKEY-MIX-03-SPECIAL-PRICE-1USD (FRESH SNIFFED CVV) 190.000 cards TURKEY MIX, HIGH VALID 85-90%, uploaded 2019-11-27 (time for refunds: 15 minutes)» and «TURKEY-MIX-04-SPECIAL-PRICE-1USD (FRESH SNIFFED CVV) 205.000 cards TURKEY MIX, HIGH VALID 85-90%», uploaded 2019-11-27 (time for refunds: 15 minutes) were uploaded on 27.11.2019. «TURKEY-MIX-03» had roughly 190,000 records, while «TURKEY-MIX-04» had about 205,000 cards. The cards were valued at 1$ each.
Neither of these four parts that went on sale had been promoted prior either in the news, on card shop or even on forums on the dark net. It is also worth noting that the cards from Turkey are very rare on the cardshops, in the past 12 months this is the only big sale of payment cards related to Turkish banks.
Head of Group-IB сybercrime research unit
To avoid a card being compromised online due to JS-sniffers, Group-IB experts recommend that users should have a separate pre-paid card for online payments, set spending limits on cards, used for online shopping, or even use a separate bank account exclusively for online purchases. The admins of eCommerce websites, in their turn, need to keep their software updated, carry out regular cybersecurity assessments of their websites and not hesitate to seek assistance from cybersecurity specialists whenever needed.