What happened
An exposed open directory was discovered hosting a complete Build Your Own Botnet (BYOB) command-and-control framework that was publicly accessible over the internet. The directory contained multiple malicious components, including droppers, stagers, and post-exploitation modules designed to provide persistent remote access to compromised systems. The framework supported payloads for Windows, Linux, and macOS, indicating cross-platform targeting. Analysis by Hunt.io showed that the hosted files included scripts and binaries used to deploy the initial malware stages, establish communication with the command-and-control server, and enable follow-on activity after infection. The open directory allowed unrestricted access to these files, enabling anyone to download the malware components directly. The exposure revealed operational infrastructure associated with active malware tooling rather than a limited sample or proof-of-concept deployment.
Who is affected
Systems that downloaded and executed the hosted payloads are affected across multiple operating systems.
Why CISOs should care
Openly accessible malware infrastructure enables rapid distribution of cross-platform threats.
3 practical actions
- Identify affected hosts. Review logs for connections to the exposed directory.
- Isolate compromised systems. Prevent further activity.
- Block exposed infrastructure. Restrict access to known artifacts.