Obfuscation is hiding the day-to-day building and testing of new tools, chat servers, etc. 
Similar Techniques by Tactic
|Adversary Opsec||Obfuscate infrastructure|
Detectable by Common Defenses (Yes/No/Partial): No
Explanation: Defender will generally not have visibility into their infrastructure.
Difficulty for the Adversary
Easy for the Adversary (Yes/No): Yes
Explanation: Building and testing infrastructure and obfuscating it to protect it against intrusions are a standard part of the adversary process in preparing to conduct an operation against a target.
- FireEye. (2015, May). APT17: Hiding in Plain Sight - FireEye and Microsoft Expose Obfuscation Tactic. Retrieved March 6, 2017.