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Snowflake-Related Arrests: UNC5537’s Kitchener Pinch

On October 30, 2024, Canadian authorities arrested a 26-year-old Kitchener, Ontario man on a US warrant connecting him to the Snowflake-account intrusions tracked by Mandiant as UNC5537 — the crew behind the Ticketmaster, Santander, and AT&T disclosures that dominated 2024's data-theft calendar. The arrest, first reported in early November by Bloomberg identifying the suspect as Connor Riley Moucka, illuminated the infostealer-credential-to-cloud kill chain and the market for stolen data. This account reconstructs the campaign, the arrest, and the MFA lessons that outlast it.

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The Snowflake Extortion Campaign at Its Peak: 165+ Customers, One Credential Wave

On June 19, 2024, Mandiant's public advisory named UNC5537 as the crew behind the Snowflake extortion wave — 165+ victim organizations entered with infostealer credentials against MFA-less tenants, datasets extorted through listings and a dedicated leak market researchers dubbed Snow:Bay. This piece condenses the TTP catalogue, the backyard economics of stolen logs, the aftermarket that changed notification obligations forever, and the single control that would have prevented every confirmed intrusion.

Continue ReadingThe Snowflake Extortion Campaign at Its Peak: 165+ Customers, One Credential Wave
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