{'created': '2020-10-19T17:58:04.155Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'Adversaries may use [Patch System '
                'Image](https://attack.mitre.org/techniques/T1601/001) to hard '
                'code a password in the operating system, thus bypassing of '
                'native authentication mechanisms for local accounts on '
                'network devices.\n'
                '\n'
                '[Modify System '
                'Image](https://attack.mitre.org/techniques/T1601) 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)',
 'external_references': [{'external_id': 'T1556.004',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1556/004'},
                         {'description': 'Bill Hau, Tony Lee, Josh Homan. '
                                         '(2015, September 15). SYNful Knock - '
                                         'A Cisco router implant - Part I. '
                                         'Retrieved November 17, 2024.',
                          'source_name': 'Mandiant - Synful Knock',
                          'url': 'https://cloud.google.com/blog/topics/threat-intelligence/synful-knock-acis/'},
                         {'description': 'Cisco. (n.d.). Cisco IOS Software '
                                         'Integrity Assurance - Cisco IOS '
                                         'Image File Verification. Retrieved '
                                         'October 19, 2020.',
                          'source_name': 'Cisco IOS Software Integrity '
                                         'Assurance - Image File Verification',
                          'url': 'https://tools.cisco.com/security/center/resources/integrity_assurance.html#7'},
                         {'description': 'Cisco. (n.d.). Cisco IOS Software '
                                         'Integrity Assurance - Cisco IOS '
                                         'Run-Time Memory Integrity '
                                         'Verification. Retrieved October 19, '
                                         '2020.',
                          'source_name': 'Cisco IOS Software Integrity '
                                         'Assurance - Run-Time Memory '
                                         'Verification',
                          'url': 'https://tools.cisco.com/security/center/resources/integrity_assurance.html#13'}],
 'id': 'attack-pattern--fa44a152-ac48-441e-a524-dd7b04b8adcd',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'credential-access'},
                       {'kill_chain_name': 'mitre-attack',
                        'phase_name': 'defense-evasion'},
                       {'kill_chain_name': 'mitre-attack',
                        'phase_name': 'persistence'}],
 'modified': '2025-10-24T17:49:38.719Z',
 'name': 'Network Device Authentication',
 'object_marking_refs': ['marking-definition--fa42a846-8d90-4e51-bc29-71d5b4802168'],
 'revoked': False,
 'spec_version': '2.1',
 'type': 'attack-pattern',
 'x_mitre_attack_spec_version': '3.2.0',
 'x_mitre_deprecated': False,
 'x_mitre_detection': '',
 'x_mitre_domains': ['enterprise-attack'],
 'x_mitre_is_subtechnique': True,
 'x_mitre_modified_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'x_mitre_platforms': ['Network Devices'],
 'x_mitre_version': '2.1'}