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⚔️ OpenBLD.net — Algorithm (zBLD) vs. Algorithm (DGA)

· 2 min read
Yevgeniy Goncharov
Yevgeniy Goncharov
Maintainer of OpenBLD.net

🥷 OpenBLD.net — Algorithm (zBLD) vs. Algorithm (DGA)

Malware and botnets use DGA (Domain Generation Algorithm)—algorithms that generate hundreds of "trash" domains per second to communicate with C2 servers.

An attack example from real OpenBLD logs:

  • 3e1c2d1d-9032...spellingpurge[.]top
  • s-dfgfd-sdfz...zdssragv[.]mom
  • 96bccebb2f7e...wu7y6z[.]com
  • 60r...60pg0131[.]cc
  • and billions of similar ones...

What's the harm?

Aside from the obvious malicious intent, this chaotic spam clogs the cache, hammers I/O, chews up CPU time, and generates gigabytes of junk logs. As a result—speed degradation and high resource utilization.

How to fight it?

Signatures and blacklists are useless—a total waste of resources, as these domains live for only a matter of minutes.

The Solution is proactive analysis: a detection algorithm against a generation algorithm.

In OpenBLD, the smart DGA detection has been continuously improving and running since 2025 (before that, it spent a whole year being refined, tested, and running in read-only mode).

The Result:

Junk is blocked on the fly. The service preserves resources, while end users get maximum response speed.

Engineering in details ☝️ Speed and protection at the intersection of algorithms:

• https://openbld.net/

Updates​