{'created': '2020-10-19T19:03:48.310Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'Adversaries may reduce the level of effort required to '
                'decrypt data transmitted over the network by reducing the '
                'cipher strength of encrypted communications.(Citation: Cisco '
                'Synful Knock Evolution)\n'
                '\n'
                'Adversaries can weaken the encryption software on a '
                'compromised network device by reducing the key size used by '
                'the software to convert plaintext to ciphertext (e.g., from '
                'hundreds or thousands of bytes to just a couple of bytes). As '
                'a result, adversaries dramatically reduce the amount of '
                'effort needed to decrypt the protected information without '
                'the key.\n'
                '\n'
                'Adversaries may modify the key size used and other encryption '
                'parameters using specialized commands in a [Network Device '
                'CLI](https://attack.mitre.org/techniques/T1059/008) '
                'introduced to the system through [Modify System '
                'Image](https://attack.mitre.org/techniques/T1601) to change '
                'the configuration of the device. (Citation: Cisco Blog Legacy '
                'Device Attacks)',
 'external_references': [{'external_id': 'T1600.001',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1600/001'},
                         {'description': 'Graham Holmes. (2015, October 8). '
                                         'Evolution of attacks on Cisco IOS '
                                         'devices. Retrieved October 19, 2020.',
                          'source_name': 'Cisco Synful Knock Evolution',
                          'url': 'https://blogs.cisco.com/security/evolution-of-attacks-on-cisco-ios-devices'},
                         {'description': 'Omar Santos. (2020, October 19). '
                                         'Attackers Continue to Target Legacy '
                                         'Devices. Retrieved October 20, 2020.',
                          'source_name': 'Cisco Blog Legacy Device Attacks',
                          'url': 'https://community.cisco.com/t5/security-blogs/attackers-continue-to-target-legacy-devices/ba-p/4169954'}],
 'id': 'attack-pattern--3a40f208-a9c1-4efa-a598-4003c3681fb8',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'defense-evasion'}],
 'modified': '2025-10-24T17:48:40.223Z',
 'name': 'Reduce Key Space',
 'object_marking_refs': ['marking-definition--fa42a846-8d90-4e51-bc29-71d5b4802168'],
 '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': '1.1'}