MITRE ATT&CK Technique
Command and Control T1071
Description

Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server. Adversaries may utilize many different protocols, including those used for web browsing, transferring files, electronic mail, DNS, or publishing/subscribing. For connections that occur internally within an enclave (such as those between a proxy or pivot node and other nodes), commonly used protocols are SMB, SSH, or RDP.(Citation: Mandiant APT29 Eye Spy Email Nov 22)

Supported Platforms
Linux macOS Windows Network Devices ESXi
Created

April 29, 2026

Last Updated

April 29, 2026

STIX Data
{'created': '2017-05-31T21:30:56.776Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'Adversaries may communicate using OSI application layer '
                'protocols to avoid detection/network filtering by blending in '
                'with existing traffic. Commands to the remote system, and '
                'often the results of those commands, will be embedded within '
                'the protocol traffic between the client and server. \n'
                '\n'
                'Adversaries may utilize many different protocols, including '
                'those used for web browsing, transferring files, electronic '
                'mail, DNS, or publishing/subscribing. For connections that '
                'occur internally within an enclave (such as those between a '
                'proxy or pivot node and other nodes), commonly used protocols '
                'are SMB, SSH, or RDP.(Citation: Mandiant APT29 Eye Spy Email '
                'Nov 22) ',
 'external_references': [{'external_id': 'T1071',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1071'},
                         {'description': 'Gardiner, J.,  Cova, M., Nagaraja, '
                                         'S. (2014, February). Command & '
                                         'Control Understanding, Denying and '
                                         'Detecting. Retrieved April 20, 2016.',
                          'source_name': 'University of Birmingham C2',
                          'url': 'https://arxiv.org/ftp/arxiv/papers/1408/1408.1136.pdf'},
                         {'description': 'Mandiant. (2022, May 2). UNC3524: '
                                         'Eye Spy on Your Email. Retrieved '
                                         'August 17, 2023.',
                          'source_name': 'Mandiant APT29 Eye Spy Email Nov 22',
                          'url': 'https://www.mandiant.com/resources/blog/unc3524-eye-spy-email'}],
 'id': 'attack-pattern--355be19c-ffc9-46d5-8d50-d6a036c675b6',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'command-and-control'}],
 'modified': '2025-10-24T17:48:38.368Z',
 'name': 'Application Layer Protocol',
 '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_contributors': ['Duane Michael'],
 'x_mitre_deprecated': False,
 'x_mitre_detection': '',
 'x_mitre_domains': ['enterprise-attack'],
 'x_mitre_is_subtechnique': False,
 'x_mitre_modified_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'x_mitre_platforms': ['Linux', 'macOS', 'Windows', 'Network Devices', 'ESXi'],
 'x_mitre_version': '2.4'}
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