The Sofia City Prosecutor's Office detained for up to 72 hours and brought as a defendant the hacker presenting himself online under the pseudonym "Emil Kyulev" - a former banker and one of the faces of the underground after the fall of the communist regime.

21-year-old Teodor  gained unauthorized access to information systems of dozens of state institutions, commercial banks, insurance companies and other legal entities and copied and used data from the information databases, the prosecutor's office said. The information theft occurred between March 2020 and January 2024.

"Emil Kyulev" last appeared in the public domain in July last year, reporting that he had hacked Lev Ins data. He then boasted that he had compromising records against the company's founder Alexei Petrov, who was killed a month later.