T1027.003SubTechniquedefense-evasionagent-callable

T1027.003Steganography

Sub-technique of T1027

Platforms: Linux · macOS · Windows

ATT&CK version: 14.1

What it is

Adversaries may use steganography techniques in order to prevent the detection of hidden information. Steganographic techniques can be used to hide data in digital media such as images, audio tracks, video clips, or text files. [Duqu](https://attack.mitre.org/software/S0038) was an early example of malware that used steganography. It encrypted the gathered information from a victim's system and hid it within an image before exfiltrating the image to a C2 server.(Citation: Wikipedia Duqu) By the end of 2017, a threat group used <code>Invoke-PSImage</code> to hide [PowerShell](https://attack.mitre.org/techniques/T1059/001) commands in an image file (.png) and execute the code on a victim's system. In this particular case the [PowerShell](https://attack.mitre.org/techniques/T1059/001) code downloaded another obfuscated script to gather intelligence from the victim's machine and communicate it back to the adversary.(Citation: McAfee Malicious Doc Targets Pyeongchang Olympics)

ATT&CK tactics· 1

Defense Evasion

References

  1. https://attack.mitre.org/techniques/T1027/003
  2. https://en.wikipedia.org/wiki/Duqu
  3. https://securingtomorrow.mcafee.com/mcafee-labs/malicious-document-targets-pyeongchang-olympics/
Sourced from MITRE ATT&CK Enterprise v14.1. Curated and contextualized for EU compliance use cases by Adam Lundqvist, Founder at SQUR.