How to Build a 404 page not found C2
Summary
This article provides a guide on how to construct a Command and Control (C2) server that mimics a '404 Not Found' error page. The intention is to create a C2 infrastructure that is less conspicuous and potentially harder for defenders to detect, as it blends in with typical web traffic.
IFF Assessment
FOE
This article details how attackers can build a more stealthy C2 server, which directly aids malicious actors in their operations.
Defender Context
Defenders should be aware of techniques that blend malicious C2 traffic with legitimate network activity, such as simulating error pages. Monitoring for unusual patterns in web server responses, even those that appear to be legitimate errors, is crucial.