FamousSparrow
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China-linked hackers hit Azerbaijani energy firm in repeated Exchange intrusions
A China-linked group targeted an Azerbaijani oil and gas firm in three waves between late December 2025 and late February 2026, repeatedly using the same Exchange Server entry point and swapping backdoors, according to a Bitdefender analysis.
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FamousSparrow Hackers Enhance Cyber Attacks with Modular Backdoor
A China-linked cyberespionage group known as FamousSparrow has intensified its operations by deploying an upgraded version of its backdoor malware, SparrowDoor, against several organizations, including a US-based trade group. ESET researchers have identified significant improvements in the malware’s structure and capabilities, raising concerns about the group’s access to advanced cyber tools.
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New Variants of SparrowDoor Malware Linked to Chinese Threat Actor FamousSparrow
The Chinese hacking group FamousSparrow has been linked to recent cyber attacks involving new variants of the SparrowDoor malware and the ShadowPad backdoor, targeting a U.S. trade group and a Mexican research institute.
