Today hackers have the potential to affect systems in numerous ways and techniques.
As you may know, hacking groups like Anonymous are launching DDoS attacks on various banks.
Hackers exploit vulnerabilities to steal sensitive information or data of an organization.

After stealing the data, a hacker can even sell the data on the dark web.
Most Dangerous Hackers of The World
Today, ransomware is widely adopted by hackers.
Ransomware is a sort of malware that blocks or restricts users from accessing their devices.

Gary McKinnon
He was a computer systems administrator but was unemployed.
In 2001, he started accessing computer systems that reportedly belonged to the U.S. military.
After acquiring access to the computers, he deleted some vital files from the computers.

The officials claimed this was the biggest attack on computer systems in the U.S. by a sole person.
The duo was responsible for huge system damage as files were moved and deleted.
Kevin broke into various computer systems and servers over several years.

Levin hailed from Russia, was arrested in the U.K., and was deported to the U.S.
He was put behind bars for three years.
In the meantime, Citibank bank managed to retrieve $400,000 of the stolen amount.

Michael Calce
Calce is well known by the name MafiaBoy.
He was a high school student in Quebec, Canada.
Calce was able to break into some popular websites in the year 2000.

Prosecutors claim that the damage to systems was about $7 million.
However, analysts approximate the attacks would have caused about $1 billion in global economic damages.
Similarly, Ancheta managed to confiscate about 500,000 machines.

Later he was detained in operation by the FBI and was put behind bars for five years.
However, he did it for his entertainment or to summon anyone.
He claimed to be an expert after attaching his name to the database of the New York Times.

He was also held responsible for leaking government to Wikileaks.
He was later arrested in the year 2003.
Experts claim that this virus caused damages of about $26 million.

After accessing the data illegally, Albert carried out transactions and withdrew money from the targeted accounts.
He caused over $200 million in damages, including cash theft and computer systems damage.
However, Greek police hinted he was a 58-year-old mathematician in Athens, Greece.

According to prosecutors, the Astra man had caused more than $360 million in damages.
So, this is the list of dangerous hackers in the world.
If you have something more to add, you might mention it in the comment section below.


