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Inside a TrickBot Variant Using DNS Tunneling for C2

July 22, 2026 · Fortinet Threat Research · Severity: MEDIUM

FortiGuard Labs analyzed a TrickBot variant that leverages DNS tunneling for command-and-control communication. The malware uses modular execution to load additional components dynamically. It also employs persistence and obfuscation techniques to evade security defenses and maintain long-term access.

FortiGuard Labs analyzes a TrickBot variant that uses DNS tunneling for C2 communication, modular execution, and employs persistence and obfuscation techniques

      

Key Takeaways

  • TrickBot variant uses DNS tunneling to hide command-and-control traffic.
  • Malware employs modular execution for flexible and stealthy operations.
  • Persistence and obfuscation techniques complicate detection and removal efforts.
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