--- title: Microsoft links Mastra AI supply chain attack to North... description: Microsoft has attributed a supply chain attack on the Mastra AI npm ecosystem to North Korean state-sponsored group Sapphire Sleet (BlueNoroff). Attackers... canonical: https://daily.dev/posts/microsoft-links-mastra-ai-supply-chain-attack-to-north-korean-hackers-nwwazvepp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft links Mastra AI supply chain attack to North Korean hackers | daily.dev og:description: Microsoft has attributed a supply chain attack on the Mastra AI npm ecosystem to North Korean state-sponsored group Sapphire Sleet (BlueNoroff). Attackers... og:url: https://daily.dev/posts/microsoft-links-mastra-ai-supply-chain-attack-to-north-korean-hackers-nwwazvepp og:image: https://api.daily.dev/og/posts/nWwAzVePP.png og:image:alt: Microsoft links Mastra AI supply chain attack to North Korean hackers og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Microsoft links Mastra AI supply chain attack to North Korean hackers **[BleepingComputer](https://daily.dev/sources/bleepingcomputer)** · 3 min read · 0 upvotes · 0 comments ## Summary Microsoft has attributed a supply chain attack on the Mastra AI npm ecosystem to North Korean state-sponsored group Sapphire Sleet (BlueNoroff). Attackers compromised the npm maintainer account 'ehindero' and published malicious updates to over 140 packages in the @mastra scope, injecting a typosquatted dependency called 'easy-day-js' (mimicking dayjs). A post-install hook deployed a cross-platform information stealer targeting Windows, Linux, and macOS, collecting browser history, credentials, API keys, and checking for 166 cryptocurrency wallet extensions including MetaMask and Coinbase Wallet. The malware used OS-specific persistence mechanisms and connected to attacker-controlled C2 infrastructure. Microsoft also linked the same group to a prior npm supply chain attack on the Axios HTTP client in April 2026. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#cyber](https://daily.dev/tags/cyber), [#malware](https://daily.dev/tags/malware), [#npm](https://daily.dev/tags/npm) [View this post on daily.dev](https://daily.dev/posts/microsoft-links-mastra-ai-supply-chain-attack-to-north-korean-hackers-nwwazvepp) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Microsoft links Mastra AI supply chain attack to North Korean hackers","url":"https://daily.dev/posts/microsoft-links-mastra-ai-supply-chain-attack-to-north-korean-hackers-nwwazvepp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-links-mastra-ai-supply-chain-attack-to-north-korean-hackers-nwwazvepp"},"datePublished":"2026-06-20T14:12:44.174Z","dateModified":"2026-06-20T14:28:09.733Z","description":"Microsoft has attributed a supply chain attack on the Mastra AI npm ecosystem to North Korean state-sponsored group Sapphire Sleet (BlueNoroff). 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