{"id":"c420410f-c2d8-4010-856b-dffe21866437","title":"Enable LM Hash Storage","description":"Detects changes to the \"NoLMHash\" registry value in order to allow Windows to store LM Hashes.\nBy setting this registry value to \"0\" (DWORD), Windows will be allowed to store a LAN manager hash of your password in Active Directory and local SAM databases.\n","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2023-12-15","modified":"","tags":["attack.persistence","attack.defense-impairment","attack.t1112"],"technique_ids":["T1112"],"logsource":{"product":"windows","category":"registry_set"},"falsepositives":["Unknown"],"references":["https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-347a","https://learn.microsoft.com/en-us/troubleshoot/windows-server/windows-security/prevent-windows-store-lm-hash-password","https://www.sans.org/blog/protecting-privileged-domain-accounts-lm-hashes-the-good-the-bad-and-the-ugly/"],"source_path":"rules/windows/registry/registry_set/registry_set_system_lsa_nolmhash.yml","source_sha256":"523c6e0cde1c6b8bad44be0c366f723573b387644c859c4c8b296a085f733308","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/registry/registry_set/registry_set_system_lsa_nolmhash.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Enable LM Hash Storage\nid: c420410f-c2d8-4010-856b-dffe21866437\nrelated:\n    - id: 98dedfdd-8333-49d4-9f23-d7018cccae53 # process_creation\n      type: similar\nstatus: test\ndescription: |\n    Detects changes to the \"NoLMHash\" registry value in order to allow Windows to store LM Hashes.\n    By setting this registry value to \"0\" (DWORD), Windows will be allowed to store a LAN manager hash of your password in Active Directory and local SAM databases.\nreferences:\n    - https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-347a\n    - https://learn.microsoft.com/en-us/troubleshoot/windows-server/windows-security/prevent-windows-store-lm-hash-password\n    - https://www.sans.org/blog/protecting-privileged-domain-accounts-lm-hashes-the-good-the-bad-and-the-ugly/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-12-15\ntags:\n    - attack.persistence\n    - attack.defense-impairment\n    - attack.t1112\nlogsource:\n    product: windows\n    category: registry_set\ndetection:\n    selection:\n        TargetObject|endswith: 'System\\CurrentControlSet\\Control\\Lsa\\NoLMHash'\n        Details: 'DWORD (0x00000000)'\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1112","id":"T1112","name":"Modify Registry","page":"techniques/enterprise/T1112/"}],"data_path":"data/detection-rules/c420410f-c2d8-4010-856b-dffe21866437.json","kind":"sigma"}