T1556.004 Network Device Authentication

Adversaries may use Patch System Image to hard code a password in the operating system, thus bypassing of native authentication mechanisms for local accounts on network devices.

Modify System Image may include implanted code to the operating system for network devices to provide access for adversaries using a specific password. The modification includes a specific password which is implanted in the operating system image via the patch. Upon authentication attempts, the inserted code will first check to see if the user input is the password. If so, access is granted. Otherwise, the implanted code will pass the credentials on for verification of potentially valid credentials.(Citation: Mandiant - Synful Knock)

View in MITRE ATT&CK®

VERIS Mappings

Capability ID Capability Description Mapping Type ATT&CK ID ATT&CK Name Notes
attribute.integrity.variety.Modify configuration Modified configuration or services related-to T1556.004 Network Device Authentication
attribute.integrity.variety.Modify privileges Modified privileges or permissions related-to T1556.004 Network Device Authentication

GCP Mappings

Capability ID Capability Description Mapping Type ATT&CK ID ATT&CK Name Notes
advanced_protection_program Advanced Protection Program technique_scores T1556.004 Network Device Authentication
Comments
Advanced Protection Program enables the use of a security key for multi-factor authentication. Integrating multi-factor authentication as part of organizational policy can greatly reduce the risk of an adversary gaining control of valid credentials that may be used for additional tactics such as initial access, lateral movement, and collecting information.
References