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FamousSparrow Cyber Group Unveils New Backdoor Variants

3/26/2025

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Summary

Story summary

ESET has uncovered that the notorious cyberespionage group FamousSparrow is still operational, challenging earlier assumptions. Their latest findings expose two new variants of the SparrowDoor backdoor, which have been deployed in attacks against a U.S. trade group and institutions in Honduras and Mexico. FamousSparrow's tactics involve a blend of tailored and publicly accessible malware, posing a significant threat across multiple sectors.

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Story summary

ESET has uncovered that the notorious cyberespionage group FamousSparrow is still operational, challenging earlier assumptions. Their latest findings expose two new variants of the SparrowDoor backdoor, which have been deployed in attacks against a U.S. trade group and institutions in Honduras and Mexico. FamousSparrow's tactics involve a blend of tailored and publicly accessible malware, posing a significant threat across multiple sectors.