What port is this service listening on/being exploited websockets 80/443? Could you not just set a firewall rule and block this? Or if it's using a well known port <1024, just look up the UID and block internet calls for that service.
Nevertheless that's why it's important to firewall your systems outbound traffic and not just the inbound. Blocking all ports out other than those you need (e.g. 20, 21, 53, 80, 123, 443, 465, 563, 587 & 995) is a good way to protect yourself against zero-days.
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Last edited by xJumper; 12-21-2018 at 02:24 AM.