Exfiltration to Text Storage Sites

# Description

Adversaries may exfiltrate data to text storage sites instead of their primary command and control channel. Text storage sites, such as <code>pastebin[.]com</code>, are commonly used by developers to share code and other information. Text storage sites are often used to host malicious code for C2 communication (e.g., [Stage Capabilities](https://attack.mitre.org/techniques/T1608)), but adversaries may also use these sites to exfiltrate collected data. Furthermore, paid features and encryption options may allow adversaries to conceal and store data more securely.(Citation: Pastebin EchoSec) **Note:** This is distinct from [Exfiltration to Code Repository](https://attack.mitre.org/techniques/T1567/001), which highlight access to code repositories via APIs.