{'created': '2020-03-11T14:56:34.154Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'Adversaries may perform calculations on addresses returned in '
                'DNS results to determine which port and IP address to use for '
                'command and control, rather than relying on a predetermined '
                'port number or the actual returned IP address. A IP and/or '
                'port number calculation can be used to bypass egress '
                'filtering on a C2 channel.(Citation: Meyers Numbered Panda)\n'
                '\n'
                'One implementation of [DNS '
                'Calculation](https://attack.mitre.org/techniques/T1568/003) '
                'is to take the first three octets of an IP address in a DNS '
                'response and use those values to calculate the port for '
                'command and control traffic.(Citation: Meyers Numbered '
                'Panda)(Citation: Moran 2014)(Citation: Rapid7G20Espionage)',
 'external_references': [{'external_id': 'T1568.003',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1568/003'},
                         {'description': 'Meyers, A. (2013, March 29). Whois '
                                         'Numbered Panda. Retrieved January '
                                         '14, 2016.',
                          'source_name': 'Meyers Numbered Panda',
                          'url': 'http://www.crowdstrike.com/blog/whois-numbered-panda/'},
                         {'description': 'Moran, N., Oppenheim, M., Engle, S., '
                                         '& Wartell, R.. (2014, September 3). '
                                         'Darwin’s Favorite APT Group '
                                         '[Blog]. Retrieved November '
                                         '12, 2014.',
                          'source_name': 'Moran 2014',
                          'url': 'https://www.fireeye.com/blog/threat-research/2014/09/darwins-favorite-apt-group-2.html'},
                         {'description': 'Rapid7. (2013, August 26). Upcoming '
                                         'G20 Summit Fuels Espionage '
                                         'Operations. Retrieved March 6, 2017.',
                          'source_name': 'Rapid7G20Espionage',
                          'url': 'https://blog.rapid7.com/2013/08/26/upcoming-g20-summit-fuels-espionage-operations/'}],
 'id': 'attack-pattern--83a766f8-1501-4b3a-a2de-2e2849e8dfc1',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'command-and-control'}],
 'modified': '2025-10-24T17:49:03.093Z',
 'name': 'DNS Calculation',
 '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': ['Linux', 'macOS', 'Windows', 'ESXi'],
 'x_mitre_version': '1.1'}