The United States has charged the Russian hacker group Sandworm, which, among other things, used ransomware to shut down a port in Rotterdam.

Wired reports that.

With the indictment, the United States wants to convict the hackers for multiple cyber attacks that have been carried out in recent years.

The hackers are in their late 20s and early 30s and all six live in Russia.

In addition to a Rotterdam container terminal, their NotPetya ransomware also took a power plant in Ukraine offline, leaving part of the country without power.

One of the suspects was also charged two years ago for his role in hacking the US electoral council during the 2016 elections. The six would be employed by the Russian intelligence service.

"They continue to carry out devastating and disruptive attacks on anyone they believe is an opponent of Russia," said an anonymous Justice Department official.

"This is probably one of the most dangerous hacker groups you can find."

Extradition seems unlikely

The case against the hackers can only start if they are extradited to the United States, which probably will not happen overnight.

The indictment makes it more difficult for the six to travel, because they cannot go to countries with extradition treaties.

In addition, they cannot use Western payment systems.