There are 2 repositories under dns-exfiltration topic.
Keylogging server and client that uses DNS tunneling/exfiltration to transmit keystrokes through firewalls.
Drive-by data exfiltration using open WiFi networks & DNS requests
High-performance/Low-Latency FPGA-based DNS attack detector and threat mitigator
SQLMap wrapper that lets you use Interact.sh as a DNS server for exfiltrating data with zero configuration
Dns Exfiltrator script, and evil Dns server side script
client & server that can be used to transfer data from a client to a DNS server using DNS only.