Non-Standard Hex Encoded Data in DNS C2 Query
This rule detects DNS queries that contain non-standard hex-encoded data, which is often indicative of Command and Control (C2) communication. Specifically, it looks for DNS queries where the query name contains a sequence of 32 or more hexadecimal characters (0-9, a-f). This pattern is frequently used by malware to exfiltrate data or receive commands via DNS tunneling, where data is encoded into subdomains.
Suricata
