T1560.003_archive-via-custom-method

T1560.003 Archive via Custom Method

Sub-technique of: T1560

High-Level Description

An adversary may compress or encrypt data that is collected prior to exfiltration using a custom method. Adversaries may choose to use custom archival methods, such as encryption with XOR or stream ciphers implemented with no external library or utility references. Custom implementations of well-known compression algorithms have also been used.

Kill Chain Phase

• Collection (TA0009)

Platforms: Linux, macOS, Windows

What to Check

• Identify if Archive via Custom Method technique is applicable to target environment
• Check Linux systems for indicators of Archive via Custom Method
• Check macOS systems for indicators of Archive via Custom Method
• Check Windows systems for indicators of Archive via Custom Method
• Assess detection coverage (1 detection strategies)

How to Test

Manual Testing

1. Identify Attack Surface: Determine if the target environment is susceptible to Archive via Custom Method by examining the target platforms (Linux, macOS, Windows).

2. Assess Existing Defenses: Review whether mitigations for T1560.003 are in place. If defenses are absent or misconfigured, this technique may be exploitable.

3. Execute Test: Use tools and methods described in the MITRE ATT&CK page and external references below.

Note: No Atomic Red Team tests available for this technique. See Atomic Red Team GitHub for updates.

Remediation Guide

No specific mitigations documented for this technique.

Detection

Detect Archiving via Custom Method (T1560.003)

Risk Assessment

CWE Categories

References

• ESET Sednit Part 2
• Atomic Red Team - T1560.003
• MITRE ATT&CK - T1560.003