Federal law enforcement in Brazil arrested a hacker allegedly behind several brazen, high-profile cyberattacks.

In a statement on Wednesday, Brazil’s Department of Federal Police (DFP)said they launched “Operation Data Breach” to investigate several intrusions on their own systems as well as others internationally. 

“A search and seizure warrant and a preventive arrest warrant was served in the city of Belo Horizonte/MG against an investigated person suspected of being responsible for two publications and sales of Federal Police data, on May 22, 2020 and on February 22, 2022,” DFP said. 

“The prisoner boasted of being responsible for several cyber intrusions carried out in some countries, claiming, on websites, to have disclosed sensitive data of 80,000 members of InfraGard, a partnership between the FBI and private critical infrastructure entities in the United States of America.” 

DFP did not name the suspect, but a threat actor known as USDoD has long boasted of being behind the December 2022 breach of the FBI’s InfraGard platform that is used by law enforcement to coordinate with companies. 

The hacker — who has been linked to Brazil by several cybersecurity researchers — also claimed breaches of European aerospace giant Airbus, the U.S. Environmental Protection Agency and several other organizations that often could not be verified. 

The same threat actor caused widespread alarm in April when they posted a database on the criminal marketplace Breached claiming it came from U.S. background check giant National Public Data. The database included about 899 million unique Social Security numbers, likely of both living and deceased people.

A bankruptcy filing by National Public Data explicitly names USDoD, noting that the hacker “has had a great deal of success breaching other institutions including the FBI, Airbus, and TransUnion.”

DFP confirmed that the person they arrested is “responsible for leaking large databases of personal information, including those of companies such as Airbus and the United States Environmental Protection Agency.” 

“The person under investigation must answer for the crime of hacking into a computer device, qualified by obtaining information, with an increase in the sentence for the commercialization of the data obtained,” they said. 

“The investigation will continue to identify any other cyber intrusions that were committed by the person under investigation.”

A person claiming to be USDoD came forward in August and spoke to a news outlet, admitting to being a 33-year-old man named Luan G. from the state of Minas Gerais in Brazil. 

“I want to say thank you, it is time to admit I got defeated and I will retire my Jersey. Yes, this is Luan speaking. I won’t run, I’m in Brazil, the same city where I was born,” he told HackRead. 

“I am a huge valuable target and maybe I will talk soon to whoever is in charge but everyone will know that behind USDoD I’m a human like everyone else, to be honest, I wanted this to happen, I can’t live with multiple lives and it is time to take responsibility for every action of mine and pay the price doesn’t matter how much it may cost me.” 

The person claimed they had already been identified by cybersecurity experts working for Crowdstrike and other companies like Intel471. Local news outlets reported at the time that Crowdstrike shared its findings with the Brazilian government. 

Other researchers have used social media accounts and more to trace the identity back to Luan.

The arrest is just the latest attempt by Brazilian law enforcement to limit the operations of hackers in their country. In January, Brazilian police disrupted the operation of a criminal group responsible for the banking malware called Grandoreiro that was used to steal €3.6 million ($3.9 million) since 2019. 

In 2022, they carried out eight search and seizure warrants as part of an investigation into attacks claimed by the Lapsus$ Group.