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Home Alerts

Hackers Track Victims Using DNS Tunneling

May 13, 2024
Reading Time: 3 mins read
in Alerts
Hackers Track Victims Using DNS Tunneling

Hackers are increasingly resorting to sophisticated methods like Domain Name System (DNS) tunneling to clandestinely monitor the activities of their targets and exploit potential vulnerabilities within networks. DNS tunneling involves the covert transmission of data or commands concealed within DNS queries, effectively repurposing DNS as a covert communication channel. Utilizing encoding techniques such as Base16 or Base64, threat actors embed their activities within DNS records like TXT, MX, CNAME, and Address records, making detection challenging.

Recent research by Palo Alto Networks’ Unit 42 has shed light on the exploitation of DNS tunneling in two prominent malicious campaigns. The first, dubbed “TrkCdn,” revolves around tracking victims’ interactions with phishing emails. In this scheme, hackers embed trigger content within emails, prompting DNS queries to attacker-controlled subdomains. This tactic enables threat actors to evaluate the effectiveness of their strategies and deliver malicious payloads efficiently. On the other hand, the “SecShow” campaign employs DNS tunneling for network scanning, allowing hackers to meticulously map network layouts and identify potential vulnerabilities ripe for exploitation.

To counteract such evolving cyber threats, organizations are urged to deploy robust DNS monitoring and analysis tools. These tools play a crucial role in identifying aberrant traffic patterns indicative of DNS tunneling activities. Furthermore, organizations should consider implementing measures to restrict DNS resolvers to handling only essential queries, thereby minimizing the likelihood of DNS tunneling misuse within their networks.

In essence, the rise of DNS tunneling underscores the imperative for proactive cybersecurity measures, emphasizing the importance of vigilance and adaptation in safeguarding against evolving cyber threats.

Reference:

  • Hackers are increasingly DNS Tunneling A Covert Cyber Threat

Tags: Base64Cyber AlertCyber Alerts 2024Cyber RiskCyber threatDNSDomain Name SystemMay 2024Palo Alto Network
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