Between approximately 2007 and 2010, a group based in Novosibirsk, Russia, operated under the online brand “1st Studio.” They produced and distributed video files that exploited minors, including girls known by pseudonyms such as “Masha” (later identified as Masha Babko) and “Veronika Babko.” The group referred to their series as “Siberian Mouse” or “Siberian Mouses” (a deliberate misspelling).
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