Feds Seize Bitcoin Ransoms Paid to North Korean Hackers
The FBI has seized $500,000 in cryptocurrency allegedly tied to a North Korean ransomware attack on US medical providers.
In a civil complaint unsealed Monday, July 18, in Wichita, prosecutors asked a federal judge to order the forfeiture of bitcoin paid by health care providers in Colorado and Kansas as ransom to North Korean hackers before it was laundered through a Hong Kong middleman.
“Thanks to rapid reporting and cooperation from a victim, the FBI and Justice Department prosecutors have disrupted the activities of a North Korean state-sponsored group deploying ransomware known as ‘Maui,’” said Deputy Attorney General Lisa O. Monaco on Tuesday during an address at the International Conference on Cyber Security in New York.
“Not only did this allow us to recover their ransom payment as well as a ransom paid by previously unknown victims, but we were also able to identify a previously unidentified ransomware strain. The approach used in this case exemplifies how the Department of Justice is attacking malicious cyber activity from all angles to disrupt bad actors and prevent the next victim,” she added.
Officials at the Permanent Mission of North Korea to the United Nations in New York and the North Korean embassy in Sweden, which handles concerns from US citizens, did not return Coffee or Die Magazine messages seeking comment.
No hearing has been scheduled for the case, which targets two cryptocurrency accounts that were seized by the FBI Kansas City Division’s Cyber Crimes Task Force on May 5.
If the judge orders the forfeiture, the money will be returned to the health care providers victimized by the hackers.
The seizures came a year and a day after employees at an unnamed Kansas medical provider reported to the FBI that they couldn’t access computer files. When they tried, they received an error message telling them the format had changed.
They also couldn’t pull up X-rays, diagnostic imaging, scanning data, the internet, and the sleep lab server. The medical provider’s information technology team determined that four servers had been encrypted by ransomware, a form of malware that blocks a computer system until the victim pays a ransom, usually through virtual currency.
Both the FBI and the IT team pinpointed the malware as “maui.exe.” A ransom demand left on a server asked for the ransom to be paid as two bitcoins, a digital currency. Two bitcoins in mid-May of 2021 were worth about $100,000.
The Kansas firm paid the ransom, and the hackers provided the IT team with the decryption keys to restore the system and files.
The FBI began tracking the ransom payment from the Kansas medical provider to the currency exchange’s address and then to its user, according to the lawsuit. They also traced a shuffling of payments from one virtual currency account to another, which apparently is how they found the second stash.
The FBI continued to monitor the accounts. On April 1, 2022, the second coffer received an influx of about $120,000 in bitcoin from an unnamed Colorado health care provider.
Authorities concluded it also had been hacked with the same malware.
On July 6, 2022, the FBI, the US Cybersecurity and Infrastructure Security Agency, and the US Department of the Treasury announced that North Korean state-sponsored hackers were using maui.exe ransomware on health care organizations.
US officials said hospitals and medical providers will quickly pay the ransom because frozen computer servers put the lives of patients at risk.
“These sophisticated criminals are constantly pushing boundaries to search for ways to extort money from victims by forcing them to pay [ransoms] in order to regain control of their computer and record systems,” said US Attorney Duston J. Slinkard in a prepared statement released Tuesday. “What these hackers don’t count on is the tenacity of the U.S. Justice Department in recovering and returning these funds to the rightful owners.”
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