Ivan Bakanov, head of the Ukrainian Security Service, speaks to the media in Kiev, Ukraine, Tuesday, July 16, 2019. Ivan Bakanov said that the hacker Mykhailo Rytyikov, who controlled 40% of the world Russian-speaking Dark Net, was detained in Odessa. (AP Photo/Efrem Lukatsky)

Ivan Bakanov, head of the Ukrainian Security Service, speaks to the media in Kiev, Ukraine, Tuesday, July 16, 2019. Ivan Bakanov said that the hacker Mykhailo Rytyikov, who controlled 40% of the world Russian-speaking Dark Net, was detained in Odessa. (AP Photo/Efrem Lukatsky)

Ukraine's SBU security service acting deputy chief Ivan Bakanov gestures as he holds a press-conference in Kiev on July 16, 2019. - Ukraine said on July 16 it has taken down a cybercrime network which caused millions of dollars in damage in the United States, the EU and Japan. Bakanov told reporters that the group, which was headed by Ukrainian national Mykhailo Rytikov, provided service of bulletproof hosting to hundreds of hackers around the globe. (Photo by Sergei SUPINSKY / AFP)

Ukraine's SBU security service acting deputy chief Ivan Bakanov gestures as he holds a press-conference in Kiev on July 16, 2019. - Ukraine said on July 16 it has taken down a cybercrime network which caused millions of dollars in damage in the United States, the EU and Japan. Bakanov told reporters that the group, which was headed by Ukrainian national Mykhailo Rytikov, provided service of bulletproof hosting to hundreds of hackers around the globe. (Photo by Sergei SUPINSKY / AFP)

Ukraine's SBU security service acting deputy chief Ivan Bakanov speaks as he holds a press conference in Kiev on July 16, 2019. - Ukraine said on July 16 it has taken down a cybercrime network which caused millions of dollars in damage in the United States, the EU and Japan. Bakanov told reporters that the group, which was headed by Ukrainian national Mykhailo Rytikov, provided service of bulletproof hosting to hundreds of hackers around the globe. (Photo by Sergei SUPINSKY / AFP)

Ukraine's SBU security service acting deputy chief Ivan Bakanov stands next to a screen as he holds a press conference in Kiev on July 16, 2019. - Ukraine said on July 16 it has taken down a cybercrime network which caused millions of dollars in damage in the United States, the EU and Japan. Bakanov told reporters that the group, which was headed by Ukrainian national Mykhailo Rytikov, provided service of bulletproof hosting to hundreds of hackers around the globe. (Photo by Sergei SUPINSKY / AFP)

Ukraine's SBU security service acting deputy chief Ivan Bakanov stands next to a TV-screen as he holds a press conference in Kiev on July 16, 2019. - Ukraine said on July 16 it has taken down a cybercrime network which caused millions of dollars in damage in the United States, the EU and Japan. Bakanov told reporters that the group, which was headed by Ukrainian national Mykhailo Rytikov, provided service of bulletproof hosting to hundreds of hackers around the globe. (Photo by Sergei SUPINSKY / AFP)