Microsoft has identified a new North Korean threat actor, now tracked as Moonstone Sleet (formerly Storm-1789), that uses both a combination of many tried-and-true techniques used by other North Korean threat actors and unique attack methodologies to target companies for its financial and cyberespionage objectives.
Moonstone Sleet is observed to set up fake companies and job opportunities to engage with potential targets, employ trojanized versions of legitimate tools, create a malicious game, and deliver a new custom ransomware. While Moonstone Sleet initially had overlaps with Diamond Sleet, the threat actor has since shifted to its own infrastructure and attacks, establishing itself as a distinct, well-resourced North Korean threat actor.
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Source: Microsoft
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