Grandstream and DrayTek Devices Exploited to Power New Hoaxcalls DDoS Botnet
released on 2020-04-07 @ 04:58:29 PM
As soon as the proof-of-concept (PoC) for CVE-2020-8515 was made publicly available in March, this vulnerability was employed by a new DDoS botnet for propagation. Further analysis shows that this malware can also propagate by exploiting CVE-2020-5722. As of now, the attack traffic detected has doubled since 03/31/2020, implying that many Grandstream UCM6200 and Draytek Vigor devices are infected or under active attack. We notified regional CERTs of potentially infected devices identified during our research prior to publication in an effort to help with awareness and remediation. The Grandstream devices are business telephone systems providers over IP, whereas the latter are routers.