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An unpatched security flaw impacting Microsoft Windows has been exploited by 11 state-sponsored groups from China, Iran, North Korea, and Russia as part of data theft, espionage, and financially motivated campaigns that date back to 2017

A newly disclosed security flaw in the Microsoft Defender SmartScreen has been exploited as a zero-day by an advanced persistent threat actor called Water Hydra (aka DarkCasino) targeting financial market traders

Trend Micro Research, News and Perspectives 2 years, 5 months ago

CVE-2024-21412: Water Hydra Targets Traders with Microsoft Defender SmartScreen Zero-Day

The APT group Water Hydra has been exploiting the zero-day Microsoft Defender SmartScreen vulnerability (CVE-2024-21412) in its campaigns targeting financial market traders. This vulnerability, which has now been patched by Microsoft, was discovered and disclosed by the Trend Micro Zero Day Initiative.