Criminal prosecution may be associated with his intention to bring most of the business outside Russia. Sachkov’s plans “aroused suspicions that he was too independent.” This is Bloomberg and its sources.
Another version-the arrest was the result of the case of the former head of the department of information security center (QIB) of the FSB Sergey Mikhailov and the ex-officer of the Ministry of Internal Affairs Ruslan Stoyanov, who headed the Kaspersky Laboratory Department. Ilya Sachkov was well familiar with them. According to investigators, in 2011, Colonel Sergei Mikhailov, who headed the FSB to the struggle with hackers, through intermediaries handed over the FBI to the FBI information about the operational-search activity of his department. All of them were connected with the case of the founder and general director of the Chronopay processing company Pavel Vrublevsky, who in the United States is counted by one of the main cybercriminals in the world. 
One of the possible branches of the case. At one time, the blogger Brayn Krebs, closely related to the FBI of the United States, published a document that belongs to the Horde of the FSB of the Russian Federation. According to the @vchkogpu channel, the document was published in the form in which it could be received exclusively from the employees of the FSB of the Russian Federation, or from Ilya Sachkov, who, as an involved specialist, conducted his study. After the arrest of Mikhailov, the topic of the leakage of the document was raised again. Recently, Mikhailov, sentenced to 22 years in prison, began to cooperate with the FSB of the Russian Federation and testify. He said that the document to Krebs was transferred directly to Sachkov.
Another possible connection. In 2020, the US Ministry of Justice accused the head of the Group-IB network security department Nikita Kislitsin of trying to sell the stolen data from users of the FormSpring social network. As follows from the testimony of kislcin to avoid punishment, he leaked the FBI “A lot of information on Russian hackers and hackers in uniform.” According to media reports, he did this with the consent of Sachkov.
And the version is the possible interaction of Sachkov with the Ukrainian special services.
Most likely, in the near future we will not recognize the details. Especially when you take into account the latest requirements from the FSB and the risks of being declared by foreign agents for disclosure. But what can be stated. The attitude to the arrests reached a new level. If earlier it was a surprise to the very fact of the loud arrest and then the nomination of versions. It’s now surprise. The arrests became commonplace. Soon we’ll switch to a new stage, when it will already be pointless to put forward versions. Arrested? Time is.
“ВЧК ОГПУ”
