Russian Ministry of Internal Affairs along with the help of Group-IB forensic specialists arrested the two hackers who compromised customer accounts of popular online stores, payment systems, and bookmakers. The investigation began in November 2015 after a massive cyber attack on a large online store and the attackers compromised more than 120,000 accounts. The hackers collected the credentials from online sources such as hacker forums and perform brute attacks to gain access for the online stores. They also sold the compromised account credentials for $5 or 20-30% of the nominal balance in the account.”]