Cisco Talos has uncovered as many as 74 Facebook hacker groups that managed to amass approximately 385,000 members, the company reports. Its research shows there is a large number of cybercriminals on social media operating right out in the open. Some of the groups escaped detection for as long as eight years before being shut down.
Their members offered a number of questionable or illegal services, including "the selling and trading of stolen bank/credit card information, the theft and sale of account credentials from a variety of sites, and email spamming tools and services." Most took payments in cryptocurrencies. However, some preferred to use a middleman, for instance, PayPal to make the transactions.