Question

While reviewing a suspicious PCAP in Wireshark, an analyst opens a single DNS packet and examines the query section. The Questions field shows one entry, the Name field contains 'a3f9c2e1b7d4.malwaredomain.example', and the Type field shows the value 16 (TXT). Given the objective of interpreting protocol header fields during intrusion analysis, what does this DNS record type most likely indicate about the traffic?

Accepted Answer

A TXT record query with a long random-looking subdomain, consistent with possible DNS tunneling or C2 data exchange

Answer

The client is requesting the authoritative name servers for the domain, a routine delegation lookup

Answer

The client is resolving an IPv6 address for the host, indicating dual-stack network configuration

Answer

A reverse DNS lookup mapping the IP address back to a hostname for logging purposes