"Ukrops [a derogatory Russian slang term used to refer to Ukrainians] are selling Javelins on the darknet. The command of the Armed Forces of Ukraine resells equipment and weapons supplied by Nato." This message about anti-tank weapons was posted on 2 June by pro-Kremlin English-language account ASB Military News.
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These posts were quickly picked up by mainstream Russian state TV, which routinely runs stories claiming Ukraine is selling weapons supplied by the West.
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"Usually, you would find people who know a marketplace. But we didn't find any reviews or recommendations of this platform. We had a lot of trouble finding anything about this marketplace, any kind of feedback," says Irina Nesterovsky, KELA chief research officer.
She questions how Russian journalists found it so easily.
Ms Nesterovsky says it is not clear if the adverts were created specifically by pro-Russian actors or if scammers active on the dark web created them independently, and then pro-Kremlin sources picked them up.
But the timing and the similarity of claims made by Russian state media outlets suggest that it could be an organised disinformation campaign.