A Ukrainian man pleaded responsible in federal court docket on Thursday to his management position in two cyberattack schemes that triggered tens of hundreds of thousands of {dollars} in losses and quickly crippled a Vermont hospital in 2020, in line with the Justice Division.

Prosecutors stated that Vyacheslav Igorevich Penchukov, 37, was a frontrunner for a company that in Might 2009 started to contaminate hundreds of computer systems at firms with malicious software program, and that he helped lead a separate malware scheme that started round November 2018.

Mr. Penchukov, of Donetsk, pleaded responsible within the U.S. District Court docket in Nebraska to 1 depend of conspiracy to commit an offense that violated the Racketeer Influenced and Corrupt Organizations Act and one depend of conspiracy to commit wire fraud. He was arrested in Switzerland in 2022 and was extradited to the USA in 2023. A lawyer for Mr. Penchukov couldn’t be discovered as a result of the court docket file was sealed.

The Justice Department said that Mr. Penchukov helped lead “a wide-ranging racketeering enterprise and conspiracy” that put in malicious software program often called Zeus onto hundreds of enterprise computer systems, beginning in 2009. The malware allowed the enterprise to gather data used to log into on-line banking accounts, together with passwords and private identification numbers.

Mr. Penchukov and different members of the group then portrayed themselves as staff of the firms who have been licensed to switch cash from the accounts they focused, inflicting hundreds of thousands of {dollars} in losses, in line with the Justice Division.

The cash was deposited into the accounts of residents of the USA and different nations who have been often called “cash mules,” and people individuals then despatched it to abroad accounts that have been run by Mr. Penchukov and different members of the group, in line with the Justice Division.

Mr. Penchukov had been charged for these offenses in 2012 whereas he was nonetheless at giant, in line with an indictment that was unsealed in 2014.

On Thursday, Mr. Penchukov additionally pleaded responsible to his management position within the separate malware scheme that ran from at the very least November 2018 to February 2021, in line with federal prosecutors.

The malware, often called IcedID or Bokbot, was put in on computer systems to gather private data from victims, together with checking account credentials, and the information was used to steal from them, in line with the Justice Division. IcedID additionally allowed the cybercriminals to put in extra malware on contaminated computer systems, together with ransomware, which is used to lock digital data till the sufferer pays for its launch.

The targets of those ransomware assaults included the College of Vermont Medical Middle, which misplaced greater than $30 million, in line with the Justice Division. A 2020 assault on the hospital additionally “left the medical middle unable to offer many important affected person providers for over two weeks, making a threat of dying or critical bodily damage to sufferers,” the Justice Division stated.

Staff on the College of Vermont Medical Middle advised The New York Instances in November 2020 that the assault had pressured the hospital to ship away a whole bunch of most cancers sufferers and required workers to look by way of written data to search out essential data.

In September 2023, the medical middle’s president, Dr. Stephen Leffler, testified within the Home of Representatives, and stated that the hospital didn’t have entry to digital medical data for 28 days due to the assault.

“We didn’t have web,” Dr. Leffler said. “We didn’t have telephones. It impacted radiology imaging, laboratory outcomes.”

The hospital stated in an announcement that it was “pleased with our workforce’s work to offer the absolute best care whereas the investigation and restoration have been underway.”

Mr. Penchukov was also referred to as Vyacheslav Igoravich Andreev and Tank, a web-based nickname, in line with the Justice Division. He had been on the F.B.I.’s Cyber’s Most Wanted List for practically a decade.

Mr. Penchukov’s sentencing is scheduled for Might 9. He faces as much as 20 years in jail for every depend.