Uncommon Registry Persistence Change

  1[metadata]
  2creation_date = "2020/11/18"
  3integration = ["endpoint"]
  4maturity = "production"
  5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
  6min_stack_version = "8.3.0"
  7updated_date = "2023/06/22"
  8
  9[rule]
 10author = ["Elastic"]
 11description = """
 12Detects changes to registry persistence keys that are not commonly used or modified by legitimate programs. This could
 13be an indication of an adversary's attempt to persist in a stealthy manner.
 14"""
 15from = "now-9m"
 16index = ["logs-endpoint.events.*"]
 17language = "eql"
 18license = "Elastic License v2"
 19name = "Uncommon Registry Persistence Change"
 20references = ["https://www.microsoftpressstore.com/articles/article.aspx?p=2762082&seqNum=2"]
 21risk_score = 47
 22rule_id = "54902e45-3467-49a4-8abc-529f2c8cfb80"
 23severity = "medium"
 24tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Persistence", "Data Source: Elastic Defend"]
 25timeline_id = "3e47ef71-ebfc-4520-975c-cb27fc090799"
 26timeline_title = "Comprehensive Registry Timeline"
 27timestamp_override = "event.ingested"
 28type = "eql"
 29
 30query = '''
 31registry where host.os.type == "windows" and
 32  /* uncomment once stable length(registry.data.strings) > 0 and */
 33 registry.path : (
 34      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Terminal Server\\Install\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\*",
 35      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Terminal Server\\Install\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Runonce\\*",
 36      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\Load",
 37      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\Run",
 38      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\IconServiceLib",
 39      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Shell",
 40      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Shell",
 41      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\AppSetup",
 42      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Taskman",
 43      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Userinit",
 44      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\VmApplet",
 45      "HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*",
 46      "HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\Shell",
 47      "HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logoff\\Script",
 48      "HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logon\\Script",
 49      "HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Shutdown\\Script",
 50      "HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Startup\\Script",
 51      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*",
 52      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\Shell",
 53      "HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logoff\\Script",
 54      "HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logon\\Script",
 55      "HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Shutdown\\Script",
 56      "HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Startup\\Script",
 57      "HKLM\\SOFTWARE\\Microsoft\\Active Setup\\Installed Components\\*\\ShellComponent",
 58      "HKLM\\SOFTWARE\\Microsoft\\Windows CE Services\\AutoStartOnConnect\\MicrosoftActiveSync",
 59      "HKLM\\SOFTWARE\\Microsoft\\Windows CE Services\\AutoStartOnDisconnect\\MicrosoftActiveSync",
 60      "HKLM\\SOFTWARE\\Microsoft\\Ctf\\LangBarAddin\\*\\FilePath",
 61      "HKLM\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Exec",
 62      "HKLM\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Script",
 63      "HKLM\\SOFTWARE\\Microsoft\\Command Processor\\Autorun",
 64      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Ctf\\LangBarAddin\\*\\FilePath",
 65      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Exec",
 66      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Script",
 67      "HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Command Processor\\Autorun",
 68      "HKEY_USERS\\*\\Control Panel\\Desktop\\scrnsave.exe",
 69      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\*\\VerifierDlls",
 70      "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GpExtensions\\*\\DllName",
 71      "HKLM\\SYSTEM\\ControlSet*\\Control\\SafeBoot\\AlternateShell",
 72      "HKLM\\SYSTEM\\ControlSet*\\Control\\Terminal Server\\Wds\\rdpwd\\StartupPrograms",
 73      "HKLM\\SYSTEM\\ControlSet*\\Control\\Terminal Server\\WinStations\\RDP-Tcp\\InitialProgram",
 74      "HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\BootExecute",
 75      "HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\SetupExecute",
 76      "HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\Execute",
 77      "HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\S0InitialCommand",
 78      "HKLM\\SYSTEM\\ControlSet*\\Control\\ServiceControlManagerExtension",
 79      "HKLM\\SYSTEM\\ControlSet*\\Control\\BootVerificationProgram\\ImagePath",
 80      "HKLM\\SYSTEM\\Setup\\CmdLine",
 81      "HKEY_USERS\\*\\Environment\\UserInitMprLogonScript") and
 82
 83 not registry.data.strings : ("C:\\Windows\\system32\\userinit.exe", "cmd.exe", "C:\\Program Files (x86)\\*.exe",
 84                              "C:\\Program Files\\*.exe") and
 85 not (process.name : "rundll32.exe" and registry.path : "*\\Software\\Microsoft\\Internet Explorer\\Extensions\\*\\Script") and
 86 not process.executable : ("C:\\Windows\\System32\\msiexec.exe",
 87                           "C:\\Windows\\SysWOW64\\msiexec.exe",
 88                           "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\*\\MsMpEng.exe",
 89                           "C:\\Program Files\\*.exe",
 90                           "C:\\Program Files (x86)\\*.exe")
 91'''
 92
 93
 94[[rule.threat]]
 95framework = "MITRE ATT&CK"
 96[[rule.threat.technique]]
 97id = "T1547"
 98name = "Boot or Logon Autostart Execution"
 99reference = "https://attack.mitre.org/techniques/T1547/"
100[[rule.threat.technique.subtechnique]]
101id = "T1547.001"
102name = "Registry Run Keys / Startup Folder"
103reference = "https://attack.mitre.org/techniques/T1547/001/"
104
105[[rule.threat.technique]]
106id = "T1546"
107name = "Event Triggered Execution"
108reference = "https://attack.mitre.org/techniques/T1546/"
109[[rule.threat.technique.subtechnique]]
110id = "T1546.002"
111name = "Screensaver"
112reference = "https://attack.mitre.org/techniques/T1546/002/"
113
114[rule.threat.tactic]
115id = "TA0003"
116name = "Persistence"
117reference = "https://attack.mitre.org/tactics/TA0003/"
118[[rule.threat]]
119framework = "MITRE ATT&CK"
120[[rule.threat.technique]]
121id = "T1112"
122name = "Modify Registry"
123reference = "https://attack.mitre.org/techniques/T1112/"
124
125
126[rule.threat.tactic]
127id = "TA0005"
128name = "Defense Evasion"
129reference = "https://attack.mitre.org/tactics/TA0005/"