Obfuscated Files or Information: Steganography (T1027.003)

Tactic: Stealth · Platforms: Linux, macOS, Windows

The interactive view maps 1 detection strategy, 9 threat groups, 19 software entries, 2 campaigns to this technique, alongside D3FEND countermeasures and data-component coverage.

Sub-technique of Obfuscated Files or Information (T1027).

Overview

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 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.

By the end of 2017, a threat group used Invoke-PSImage to hide PowerShell commands in an image file (.png) and execute the code on a victim's system. In this particular case the PowerShell code downloaded another obfuscated script to gather intelligence from the victim's machine and communicate it back to the adversary.

Explore

• Open T1027.003 in the interactive ATT&CK matrix
• ATT&CK Intelligence View guide
• Official MITRE ATT&CK entry for T1027.003
• Sigma detection rules for MITRE ATT&CK
• Built by Shahrukh Khan