MITRE ATT&CK Technique
Reconnaissance T1596.001
Description

Adversaries may search DNS data for information about victims that can be used during targeting. DNS information may include a variety of details, including registered name servers as well as records that outline addressing for a target’s subdomains, mail servers, and other hosts. Adversaries may search DNS data to gather actionable information. Threat actors can query nameservers for a target organization directly, or search through centralized repositories of logged DNS query responses (known as passive DNS).(Citation: DNS Dumpster)(Citation: Circl Passive DNS) Adversaries may also seek and target DNS misconfigurations/leaks that reveal information about internal networks. Information from these sources may reveal opportunities for other forms of reconnaissance (ex: [Search Victim-Owned Websites](https://attack.mitre.org/techniques/T1594) or [Search Open Websites/Domains](https://attack.mitre.org/techniques/T1593)), establishing operational resources (ex: [Acquire Infrastructure](https://attack.mitre.org/techniques/T1583) or [Compromise Infrastructure](https://attack.mitre.org/techniques/T1584)), and/or initial access (ex: [External Remote Services](https://attack.mitre.org/techniques/T1133) or [Trusted Relationship](https://attack.mitre.org/techniques/T1199)).

Supported Platforms
PRE
Created

April 29, 2026

Last Updated

April 29, 2026

STIX Data
{'created': '2020-10-02T16:57:45.044Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'Adversaries may search DNS data for information about victims '
                'that can be used during targeting. DNS information may '
                'include a variety of details, including registered name '
                'servers as well as records that outline addressing for a '
                'target’s subdomains, mail servers, and other hosts.\n'
                '\n'
                'Adversaries may search DNS data to gather actionable '
                'information. Threat actors can query nameservers for a target '
                'organization directly, or search through centralized '
                'repositories of logged DNS query responses (known as passive '
                'DNS).(Citation: DNS Dumpster)(Citation: Circl Passive DNS) '
                'Adversaries may also seek and target DNS '
                'misconfigurations/leaks that reveal information about '
                'internal networks. Information from these sources may reveal '
                'opportunities for other forms of reconnaissance (ex: [Search '
                'Victim-Owned '
                'Websites](https://attack.mitre.org/techniques/T1594) or '
                '[Search Open '
                'Websites/Domains](https://attack.mitre.org/techniques/T1593)), '
                'establishing operational resources (ex: [Acquire '
                'Infrastructure](https://attack.mitre.org/techniques/T1583) or '
                '[Compromise '
                'Infrastructure](https://attack.mitre.org/techniques/T1584)), '
                'and/or initial access (ex: [External Remote '
                'Services](https://attack.mitre.org/techniques/T1133) or '
                '[Trusted '
                'Relationship](https://attack.mitre.org/techniques/T1199)).',
 'external_references': [{'external_id': 'T1596.001',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1596/001'},
                         {'description': 'CIRCL Computer Incident Response '
                                         'Center. (n.d.). Passive DNS. '
                                         'Retrieved October 20, 2020.',
                          'source_name': 'Circl Passive DNS',
                          'url': 'https://www.circl.lu/services/passive-dns/'},
                         {'description': 'Hacker Target. (n.d.). DNS Dumpster. '
                                         'Retrieved October 20, 2020.',
                          'source_name': 'DNS Dumpster',
                          'url': 'https://dnsdumpster.com/'}],
 'id': 'attack-pattern--17fd695c-b88c-455a-a3d1-43b6cb728532',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'reconnaissance'}],
 'modified': '2025-10-24T17:48:27.172Z',
 'name': 'DNS/Passive DNS',
 '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': ['PRE'],
 'x_mitre_version': '1.0'}
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