Sleet

2023-04-18 • MicrosoftHow Microsoft names threat actors

Sleet is the weather-family suffix Microsoft uses for North Korean threat actors in its naming taxonomy. It is combined with a unique first word to form names such as Ruby Sleet, Sapphire Sleet, Pearl Sleet, Opal Sleet, Emerald Sleet, and Diamond Sleet; Sleet alone does not identify a single activity cluster.

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