{'created': '2020-02-11T18:38:22.617Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'Adversaries with no prior knowledge of legitimate credentials '
                'within the system or environment may guess passwords to '
                'attempt access to accounts. Without knowledge of the password '
                'for an account, an adversary may opt to systematically guess '
                'the password using a repetitive or iterative mechanism. An '
                'adversary may guess login credentials without prior knowledge '
                'of system or environment passwords during an operation by '
                'using a list of common passwords. Password guessing may or '
                "may not take into account the target's policies on password "
                'complexity or use policies that may lock accounts out after a '
                'number of failed attempts.\n'
                '\n'
                'Guessing passwords can be a risky option because it could '
                'cause numerous authentication failures and account lockouts, '
                "depending on the organization's login failure policies. "
                '(Citation: Cylance Cleaver)\n'
                '\n'
                'Typically, management services over commonly used ports are '
                'used when guessing passwords. Commonly targeted services '
                'include the following:\n'
                '\n'
                '* SSH (22/TCP)\n'
                '* Telnet (23/TCP)\n'
                '* FTP (21/TCP)\n'
                '* NetBIOS / SMB / Samba (139/TCP & 445/TCP)\n'
                '* LDAP (389/TCP)\n'
                '* Kerberos (88/TCP)\n'
                '* RDP / Terminal Services (3389/TCP)\n'
                '* HTTP/HTTP Management Services (80/TCP & 443/TCP)\n'
                '* MSSQL (1433/TCP)\n'
                '* Oracle (1521/TCP)\n'
                '* MySQL (3306/TCP)\n'
                '* VNC (5900/TCP)\n'
                '* SNMP (161/UDP and 162/TCP/UDP)\n'
                '\n'
                'In addition to management services, adversaries may "target '
                'single sign-on (SSO) and cloud-based applications utilizing '
                'federated authentication protocols," as well as externally '
                'facing email applications, such as Office 365.(Citation: '
                'US-CERT TA18-068A 2018). Further, adversaries may abuse '
                'network device interfaces (such as `wlanAPI`) to brute force '
                'accessible wifi-router(s) via wireless authentication '
                'protocols.(Citation: Trend Micro Emotet 2020)\n'
                '\n'
                'In default environments, LDAP and Kerberos connection '
                'attempts are less likely to trigger events over SMB, which '
                'creates Windows "logon failure" event ID 4625.',
 'external_references': [{'external_id': 'T1110.001',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1110/001'},
                         {'description': 'Cybercrime & Digital Threat Team. '
                                         '(2020, February 13). Emotet Now '
                                         'Spreads via Wi-Fi. Retrieved '
                                         'February 16, 2022.',
                          'source_name': 'Trend Micro Emotet 2020',
                          'url': 'https://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/emotet-now-spreads-via-wi-fi'},
                         {'description': 'Cylance. (2014, December). Operation '
                                         'Cleaver. Retrieved September 14, '
                                         '2017.',
                          'source_name': 'Cylance Cleaver',
                          'url': 'https://web.archive.org/web/20200302085133/https://www.cylance.com/content/dam/cylance/pages/operation-cleaver/Cylance_Operation_Cleaver_Report.pdf'},
                         {'description': 'US-CERT. (2018, March 27). TA18-068A '
                                         'Brute Force Attacks Conducted by '
                                         'Cyber Actors. Retrieved October 2, '
                                         '2019.',
                          'source_name': 'US-CERT TA18-068A 2018',
                          'url': 'https://www.us-cert.gov/ncas/alerts/TA18-086A'}],
 'id': 'attack-pattern--09c4c11e-4fa1-4f8c-8dad-3cf8e69ad119',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'credential-access'}],
 'modified': '2025-10-24T17:48:21.929Z',
 'name': 'Password Guessing',
 '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': ['Microsoft Threat Intelligence Center (MSTIC)',
                          'Mohamed Kmal'],
 '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': ['Windows',
                       'SaaS',
                       'IaaS',
                       'Linux',
                       'macOS',
                       'Containers',
                       'Network Devices',
                       'Office Suite',
                       'Identity Provider',
                       'ESXi'],
 'x_mitre_version': '1.7'}