A black market, underground economy, or shadow economy is a secret market or transaction that has some facet of illegality or is characterized by some form of noncompliant
behavior by having an institutional group of rules.
Almost all things that are illegal to offer are sold in these markets. Drugs, hacked account credentials, bank card informations are just a some of the best known ones. There are so many different types of products sold in these markets, but we just focus on user credentials which are obtained as a result of a hacker event.
Over 3 Billion user accounts were hijacked only in 2016. Leaked data include credit cards, e-mails, passwords, health credential, bank-account details and various other valuable
personal information. Black markets are available area for this sort of data, such data
appeared within days on black-market sites. Other types of attacks are as follows;
Recent increases in the utilization of watering-hole attacks (where users visit popular,
legitimate, but compromised websites) predicated on well-known exploit kits readily available for sale
on the black market
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