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The Damselfly Advanced Persistent Threat (APT) group, also known as APT42, has been actively utilizing custom backdoor variants, NiceCurl and TameCat, to infiltrate Windows machines
NiceCurl & TameCat backdoors represent a sophisticated toolkit in Damselfly’s arsenal, enabling threat actors to gain initial access to targeted environments discreetly.
According to Broadcom report, the group’s activities have been primarily directed at energy companies and other critical infrastructure sectors across the U.S., Europe, and the Middle East.
https://www.broadcom.com/support/security-center/protection-bulletin/nicecurl-and-tamecat-custom-backdoors-leveraged-by-damselfly-apt