Editor Notes: Reconstructing the reported timeline of events: (1) September 2023: The Matryoshka disinformation campaign reportedly began, allegedly producing anti-Ukrainian propaganda and distributing it via stolen accounts and bots on platforms like X and Telegram. (2) November 2023: Reports from Viginum reportedly revealed similarities between Matryoshka and Russia's GRU-linked Doppelgänger network, allegedly indicating potential shared origins. (3) Early 2024: The campaign allegedly began using AI to generate deepfake videos of academics from institutions like Cambridge and Harvard. (4) November 2024: The University of Bristol reportedly verified that a video falsely attributing political statements to historian Ronald Hutton was allegedly AI-manipulated. (5) December 13, 2024 (the date for this Incident ID): An investigation by The Insider reportedly confirmed that Matryoshka videos allegedly misrepresented academics’ voices to spread pro-Russian propaganda, with the footage heavily promoted in multiple languages by allegedly stolen social media accounts. When studying this incident, please also refer to Incidents 929, 931, 1060, and 1061. While Incident 931 has not been explicitly attributed to Operation Overload (also known as Matryoshka or Storm-1679), its thematic content and manipulation tactics appear adjacent. (No direct forensic or institutional linkage has been established as of this writing.)