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A newly discovered botnet capable of staging distributed denial-of-service (DDoS) attacks targeted unpatched Ribbon Communications (formerly Edgewater Networks) EdgeMarc appliances belonging to telecom service provider AT&T by exploiting a four-year-old flaw in the network appliances.
Chinese tech giant Qihoo 360’s Netlab network security division, which detected the botnet first on October 27, 2021, called it EwDoor, noting it observed 5,700 compromised IP addresses located in the U.S. during a brief three-hour window.