Elastic medium stable eql
Uncommon Registry Persistence Change
Detects changes to registry persistence keys that are not commonly used or modified by legitimate programs. This could be an indication of an adversary's attempt to persist in a stealthy manner.
Detection Logic
registry where host.os.type == "windows" and event.type == "change" and
length(registry.data.strings) > 0 and
registry.path : (
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Terminal Server\\Install\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\*",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Terminal Server\\Install\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Runonce\\*",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\Load",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\Run",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\IconServiceLib",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Shell",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Shell",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\AppSetup",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Taskman",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Userinit",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\VmApplet",
"HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*",
"HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\Shell",
"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logoff\\Script",
"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logon\\Script",
"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Shutdown\\Script",
"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Startup\\Script",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\Shell",
"HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logoff\\Script",
"HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Logon\\Script",
"HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Shutdown\\Script",
"HKEY_USERS\\*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\Scripts\\Startup\\Script",
"HKLM\\SOFTWARE\\Microsoft\\Active Setup\\Installed Components\\*\\ShellComponent",
"HKLM\\SOFTWARE\\Microsoft\\Windows CE Services\\AutoStartOnConnect\\MicrosoftActiveSync",
"HKLM\\SOFTWARE\\Microsoft\\Windows CE Services\\AutoStartOnDisconnect\\MicrosoftActiveSync",
"HKLM\\SOFTWARE\\Microsoft\\Ctf\\LangBarAddin\\*\\FilePath",
"HKLM\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Exec",
"HKLM\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Script",
"HKLM\\SOFTWARE\\Microsoft\\Command Processor\\Autorun",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Ctf\\LangBarAddin\\*\\FilePath",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Exec",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Internet Explorer\\Extensions\\*\\Script",
"HKEY_USERS\\*\\SOFTWARE\\Microsoft\\Command Processor\\Autorun",
"HKEY_USERS\\*\\Control Panel\\Desktop\\scrnsave.exe",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\*\\VerifierDlls",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GpExtensions\\*\\DllName",
"HKLM\\SYSTEM\\ControlSet*\\Control\\SafeBoot\\AlternateShell",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Terminal Server\\Wds\\rdpwd\\StartupPrograms",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Terminal Server\\WinStations\\RDP-Tcp\\InitialProgram",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\BootExecute",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\BootExecuteNoPnpSync",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\SetupExecute",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\SetupExecuteNoPnpSync",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\PlatformExecute",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\Execute",
"HKLM\\SYSTEM\\ControlSet*\\Control\\Session Manager\\S0InitialCommand",
"HKLM\\SYSTEM\\ControlSet*\\Control\\ServiceControlManagerExtension",
"HKLM\\SYSTEM\\ControlSet*\\Control\\BootVerificationProgram\\ImagePath",
"HKLM\\SYSTEM\\Setup\\CmdLine",
"HKEY_USERS\\*\\Environment\\UserInitMprLogonScript") and
not registry.data.strings : ("C:\\Windows\\system32\\userinit.exe", "cmd.exe", "C:\\Program Files (x86)\\*.exe",
"C:\\Program Files\\*.exe") and
not (process.name : "rundll32.exe" and registry.path : "*\\Software\\Microsoft\\Internet Explorer\\Extensions\\*\\Script") and
not process.executable : ("C:\\Windows\\System32\\msiexec.exe",
"C:\\Windows\\SysWOW64\\msiexec.exe",
"C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\*\\MsMpEng.exe",
"C:\\Program Files\\*.exe",
"C:\\Program Files (x86)\\*.exe") and
not (process.name : ("TiWorker.exe", "poqexec.exe") and registry.value : "SetupExecute" and
registry.data.strings : (
"C:\\windows\\System32\\poqexec.exe /display_progress \\SystemRoot\\WinSxS\\pending.xml",
"C:\\Windows\\System32\\poqexec.exe /skip_critical_poq /display_progress \\SystemRoot\\WinSxS\\pending.xml"
)
) and
not (process.name : "svchost.exe" and registry.value : "SCRNSAVE.EXE" and
registry.data.strings : (
"%windir%\\system32\\rundll32.exe user32.dll,LockWorkStation",
"scrnsave.scr",
"%windir%\\system32\\Ribbons.scr"
)
) Field Validations
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