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Actor

State agencyCorroborated

Star Blizzard

SEABORGIUM · Callisto Group · ColdRiver

A cyber-espionage group that the UK National Cyber Security Centre assesses is almost certainly subordinate to the Russian FSB's Centre 18. Its long-running spearphishing activity included the compromise of UK-US trade documents later leaked and promoted before the 2019 UK general election. "Star Blizzard" is a Microsoft designation adopted in 2023; at the time of the 2019 leak the group was known as Callisto Group or Seaborgium.

Operations

Elections

Evidence Library

Official reportUK National Cyber Security CentreDecember 7, 2023New
UK and allies expose Star Blizzard political-interference campaign
OriginalArchive pending
Official reportUK National Cyber Security CentreNovember 3, 2020New
NCSC Annual Review 2020: foreign interference in the 2019 general election
OriginalArchive pending
Official reportUK National Cyber Security CentreDecember 7, 2023New
UK and allies expose Star Blizzard political-interference campaign
OriginalArchive pending

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