MITRE ATT&CK Technique
Exfiltration T1030
Description

An adversary may exfiltrate data in fixed size chunks instead of whole files or limit packet sizes below certain thresholds. This approach may be used to avoid triggering network data transfer threshold alerts.

Supported Platforms
Linux macOS Windows ESXi
Created

April 29, 2026

Last Updated

April 29, 2026

STIX Data
{'created': '2017-05-31T21:30:34.523Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'An adversary may exfiltrate data in fixed size chunks instead '
                'of whole files or limit packet sizes below certain '
                'thresholds. This approach may be used to avoid triggering '
                'network data transfer threshold alerts.',
 'external_references': [{'external_id': 'T1030',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1030'},
                         {'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'}],
 'id': 'attack-pattern--c3888c54-775d-4b2f-b759-75a2ececcbfd',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'exfiltration'}],
 'modified': '2025-10-24T17:49:20.770Z',
 'name': 'Data Transfer Size Limits',
 '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': False,
 'x_mitre_modified_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'x_mitre_platforms': ['Linux', 'macOS', 'Windows', 'ESXi'],
 'x_mitre_version': '1.1'}
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