Startup or Run Key Registry Modification

Last updated 2 months ago on 2025-09-18
Created 5 years ago on 2020-11-18

About

Identifies run key or startup key registry modifications. In order to survive reboots and other system interrupts, attackers will modify run keys within the registry or leverage startup folder items as a form of persistence.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: PersistenceData Source: Elastic EndgameData Source: Elastic DefendLanguage: eql
Severity
low
Risk Score
21
MITRE ATT&CK™

Persistence (TA0003)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.registry-*
Related Integrations

endpoint(opens in a new tab or window)

Query
registry where host.os.type == "windows" and event.type == "change" and 
 registry.data.strings != null and registry.hive : ("HKEY_USERS", "HKLM") and
 registry.path : (
     /* Machine Hive */
     "HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\*",
     "HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\RunOnce\\*",
     "HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\RunOnceEx\\*",
     "HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*",
     "HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Shell\\*",
     /* Users Hive */
     "HKEY_USERS\\*\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\*",
     "HKEY_USERS\\*\\Software\\Microsoft\\Windows\\CurrentVersion\\RunOnce\\*",
     "HKEY_USERS\\*\\Software\\Microsoft\\Windows\\CurrentVersion\\RunOnceEx\\*",
     "HKEY_USERS\\*\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run\\*",
     "HKEY_USERS\\*\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Shell\\*"
     ) and
  /* add common legitimate changes without being too restrictive as this is one of the most abused AESPs */
  not registry.data.strings : "ctfmon.exe /n" and
  not (registry.value : "Application Restart #*" and process.name : "csrss.exe") and
  not user.id : ("S-1-5-18", "S-1-5-19", "S-1-5-20") and
  not registry.data.strings : ("*:\\Program Files\\*",
                               "*:\\Program Files (x86)\\*",
                               "*:\\Users\\*\\AppData\\Local\\*",
                               "* --processStart *",
                               "* --process-start-args *",
                               "ms-teamsupdate.exe -UninstallT20",
                               " ",
                               "grpconv -o", "* /burn.runonce*", "* /startup",
                               "?:\\WINDOWS\\SysWOW64\\Macromed\\Flash\\FlashUtil32_*_Plugin.exe -update plugin") and
  not process.executable : ("?:\\Windows\\System32\\msiexec.exe",
                            "?:\\Windows\\SysWOW64\\msiexec.exe",
                            "D:\\*",
                            "\\Device\\Mup*",
                            "C:\\Windows\\SysWOW64\\reg.exe",
                            "C:\\Windows\\System32\\changepk.exe",
                            "C:\\Windows\\System32\\netsh.exe",
                            "C:\\$WINDOWS.~BT\\Sources\\SetupPlatform.exe",
                            "C:\\$WINDOWS.~BT\\Sources\\SetupHost.exe",
                            "C:\\Program Files\\Cisco Spark\\CiscoCollabHost.exe",
                            "C:\\Sistemas\\Programas MP\\CCleaner\\CCleaner64.exe",
                            "C:\\Program Files (x86)\\FastTrack Software\\Admin By Request\\AdminByRequest.exe",
                            "C:\\Program Files (x86)\\Exclaimer Ltd\\Cloud Signature Update Agent\\Exclaimer.CloudSignatureAgent.exe",
                            "C:\\ProgramData\\Lenovo\\Vantage\\AddinData\\LenovoBatteryGaugeAddin\\x64\\QSHelper.exe",
                            "C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\*\\Installer\\setup.exe",
                            "C:\\ProgramData\\bomgar-scc-*\\bomgar-scc.exe",
                            "C:\\Windows\\SysWOW64\\Macromed\\Flash\\FlashUtil*_pepper.exe",
                            "C:\\Windows\\System32\\spool\\drivers\\x64\\3\\*.EXE",
                            "C:\\Program Files (x86)\\Common Files\\Adobe\\ARM\\*\\AdobeARM.exe")

Install detection rules in Elastic Security

Detect Startup or Run Key Registry Modification in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).