GRAYRABBIT C2 DNS Query mail.uaiubifas.top - UNC3569 RC4 Custom Protocol C2 (Exact FQDN A Record Lookup)

Arnold Chan@slaz

•updated Sep 11, 2026•0•0•1

Detects DNS A record lookups for the domain 'mail.uaiubifas.top', which is associated with GRAYRABBIT C2 activity linked to UNC3569. This domain is known to be used for command and control communications.