{'created': '2020-01-24T16:59:59.688Z',
 'created_by_ref': 'identity--c78cb6e5-0c4b-4611-8297-d1b8b55e40b5',
 'description': 'Adversaries may abuse features of Winlogon to execute DLLs '
                'and/or executables when a user logs in. Winlogon.exe is a '
                'Windows component responsible for actions at logon/logoff as '
                'well as the secure attention sequence (SAS) triggered by '
                'Ctrl-Alt-Delete. Registry entries in '
                '<code>HKLM\\Software[\\\\Wow6432Node\\\\]\\Microsoft\\Windows '
                'NT\\CurrentVersion\\Winlogon\\</code> and '
                '<code>HKCU\\Software\\Microsoft\\Windows '
                'NT\\CurrentVersion\\Winlogon\\</code> are used to manage '
                'additional helper programs and functionalities that support '
                'Winlogon.(Citation: Cylance Reg Persistence Sept 2013) \n'
                '\n'
                'Malicious modifications to these Registry keys may cause '
                'Winlogon to load and execute malicious DLLs and/or '
                'executables. Specifically, the following subkeys have been '
                'known to be possibly vulnerable to abuse: (Citation: Cylance '
                'Reg Persistence Sept 2013)\n'
                '\n'
                '* Winlogon\\Notify - points to notification package DLLs that '
                'handle Winlogon events\n'
                '* Winlogon\\Userinit - points to userinit.exe, the user '
                'initialization program executed when a user logs on\n'
                '* Winlogon\\Shell - points to explorer.exe, the system shell '
                'executed when a user logs on\n'
                '\n'
                'Adversaries may take advantage of these features to '
                'repeatedly execute malicious code and establish persistence.',
 'external_references': [{'external_id': 'T1547.004',
                          'source_name': 'mitre-attack',
                          'url': 'https://attack.mitre.org/techniques/T1547/004'},
                         {'description': 'Langendorf, S. (2013, September 24). '
                                         'Windows Registry Persistence, Part '
                                         '2: The Run Keys and Search-Order. '
                                         'Retrieved November 17, 2024.',
                          'source_name': 'Cylance Reg Persistence Sept 2013',
                          'url': 'https://web.archive.org/web/20160214140250/http://blog.cylance.com/windows-registry-persistence-part-2-the-run-keys-and-search-order'},
                         {'description': 'Russinovich, M. (2016, January 4). '
                                         'Autoruns for Windows v13.51. '
                                         'Retrieved June 6, 2016.',
                          'source_name': 'TechNet Autoruns',
                          'url': 'https://technet.microsoft.com/en-us/sysinternals/bb963902'}],
 'id': 'attack-pattern--6836813e-8ec8-4375-b459-abb388cb1a35',
 'kill_chain_phases': [{'kill_chain_name': 'mitre-attack',
                        'phase_name': 'persistence'},
                       {'kill_chain_name': 'mitre-attack',
                        'phase_name': 'privilege-escalation'}],
 'modified': '2025-10-24T17:48:53.539Z',
 'name': 'Winlogon Helper DLL',
 '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': ['Praetorian'],
 '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'],
 'x_mitre_version': '1.3'}

---

---