Chinese APT Hackers Exploit Microsoft Exchange to Breach Energy Sector Network

A Chinese state-linked hacking group known as FamousSparrow has quietly infiltrated an Azerbaijani oil and gas company, exploiting an unpatched Microsoft Exchange server to plant multiple backdoors inside the network. The attack ran from late December 2025 through late February 2026 and stands as one of the most detailed Chinese APT intrusions targeting energy infrastructure […]

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