Solonnik
Solonnik is a threat actor name observed in connection with the reposting of alleged Instagram user data on BreachForums, a cybercrime marketplace. According to the provided content, an actor using the name “Solonnik” published a dataset allegedly containing more than 17 million Instagram-related records and offered it for free. The dataset was reported to include usernames, full names, email addresses, phone numbers, partial physical addresses, and other contact details, but not passwords. The reporting states the data was allegedly originally obtained via an Instagram API vulnerability in 2024 and later resurfaced when Solonnik posted it. The content associates this activity with cybercrime-facilitating behavior involving the distribution of large-scale leaked data that could enable fraud, impersonation, and targeted phishing. No additional aliases, sub-groups, attribution, or nation-state links are provided in the content.
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