The document indicates that the Russian domestic security agency, known as the F.S.B., pulls purloined data into an analytical tool known as "Skopishche" (a Russian word for a mob of people). Information from WeChat is among the data being analyzed, according to the document... One Western intelligence agency told The Times that the information in the document was consistent with what it knew about "Russian penetration of Chinese communications...." By design, [WeChat] does not use end-to-end encryption to protect user data. That is because the Chinese government exercises strict control over the app and relies on its weak security to monitor and censor speech. Foreign intelligence agencies can exploit that weakness, too...
WeChat was briefly banned in Russia in 2017, but access was restored after Tencent took steps to comply with laws requiring foreign digital platforms above a certain size to register as "organizers of information dissemination." The Times confirmed that WeChat is currently licensed by the government to operate in Russia. That license would require Tencent to store user data on Russian servers and to provide access to security agencies upon request.