You might be surprised what you can buy on Facebook, if you know where to look. Researchers with Cisco’s Talos security research team have uncovered a wave of Facebook groups dedicated to making money from a variety of illicit and otherwise sketchy online behaviors, including phishing schemes, trading hacked credentials and spamming. The 74 groups researchers detected boasted a cumulative 385,000 members.

Remarkably, the groups weren’t even really trying to conceal their activities. For example, Talos found posts openly selling credit card numbers with three-digit CVV codes, some with accompanying photos of the card’s owner. According to the research group:

The majority of these groups use fairly obvious group names, including “Spam Professional,” “Spammer & Hacker Professional,” “Buy Cvv On THIS SHOP PAYMENT BY

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