These 9 people are among the  Most Wanted Cyber Criminals in the United States.

The FBI says these crooks are responsible for hacking more than half a billion people’s personal data, email passwords, credit card information, and bank accounts info. Their actions account for more than $100 million dollars in alleged financial losses. The targets included large companies, government and federal contractor databases, major webmail and internet service providers, and individuals.

They have ties to organized crime, Russian intelligence agencies, and international syndicates.

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Dmitry Dokuchaev and Igor Sushchin are charged with stealing user information and encrypted passwords from more than 500 million Yahoo network accounts. The stolen information was subsequently used to access accounts at Yahoo, Google, and other webmail providers.

29-year old Alexsey Belan used the stolen Yahoo passwords to comb through emails for credit card information, which he allegedly used for personal gain. He also used some 30 million Yahoo accounts to launch a spam attack.

Danial Jeloudar and Arash Amiri Abedian  are wanted by the FBI in connection with the theft and distribution of credit card numbers. They are charged with conspiracy, wire fraud, access device fraud, and aggravated identity theft.

Mohammad Saeed Ajily and Mohammad Rezakhah are on the run for allegedly hacking into network computers of a defense contractor using third-party computers to hide their identity. The FBI says they stole software and proprietary information from their high security servers.

Evgeniy Bogachev is wanted for his role in the Zeus software attack on personal computers that captured bank account numbers, passwords, and PINs. The information was used to drain bank accounts. Bogachev and his cohorts are suspected of being responsible for infecting more than a million computers which resulted in more than $100 million dollars in financial loss.

Behzad Mesri is wanted for his alleged involvement in stealing data from computer systems and using it to for an extortion scheme to steal as much as $6 million dollars in Bitcoin.

Protect Yourself From Online Scammers

Scammers have come up with all sorts of ways to steal your personal information. From sophisticated cyber-attacks to phishing schemes to spam to credit card skimmers, you need to be careful with who you are dealing with online.

If you think you have been a victim of internet criminals, contact the Internet Crime Complaint Center, known as IC3. They act as a clearinghouse for internet crimes and refer cases to the appropriate state, local, federal, or international law enforcement agency. If you suspect your credit card or bank account has been compromised, contact your financial institution immediately.