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mukul975
104 lines
3.1 KiB
Markdown
104 lines
3.1 KiB
Markdown
# Registry Run Key Persistence (T1547.001) Detection Reference
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## Sysmon Event ID 13 - RegistryEvent (Value Set)
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### Event Fields
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| Field | Description |
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|-------|-------------|
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| `UtcTime` | Timestamp of registry modification |
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| `ProcessGuid` | Unique process identifier |
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| `Image` | Full path of modifying process |
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| `TargetObject` | Full registry key path + value name |
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| `Details` | New registry value data |
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| `User` | User account context |
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### Registry Paths to Monitor
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```
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HKLM\Software\Microsoft\Windows\CurrentVersion\Run
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HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce
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HKCU\Software\Microsoft\Windows\CurrentVersion\Run
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HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce
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HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
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HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
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HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
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```
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## Sysmon Configuration
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```xml
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<Sysmon schemaversion="4.90">
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<EventFiltering>
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<RuleGroup name="RegistryPersistence" groupRelation="or">
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<RegistryEvent onmatch="include">
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<TargetObject condition="contains">CurrentVersion\Run</TargetObject>
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<TargetObject condition="contains">CurrentVersion\RunOnce</TargetObject>
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<TargetObject condition="contains">Explorer\Shell Folders</TargetObject>
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</RegistryEvent>
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</RuleGroup>
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</EventFiltering>
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</Sysmon>
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```
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## Splunk Detection Query
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```spl
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index=sysmon EventCode=13
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| where match(TargetObject, "(?i)CurrentVersion\\\\Run")
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| eval suspicious=if(match(Details, "(?i)(temp|appdata|downloads|programdata)"), "yes", "no")
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| where suspicious="yes"
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| stats count by Image, TargetObject, Details, User, host
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```
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## Sigma Rule
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```yaml
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title: Suspicious Run Key Persistence
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status: stable
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logsource:
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product: windows
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category: registry_set
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detection:
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selection:
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EventType: SetValue
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TargetObject|contains: '\CurrentVersion\Run'
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filter_legitimate:
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Details|contains:
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- 'SecurityHealth'
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- 'WindowsDefender'
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condition: selection and not filter_legitimate
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level: medium
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tags:
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- attack.persistence
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- attack.t1547.001
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```
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## Windows Registry Query (reg.exe)
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```cmd
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reg query HKLM\Software\Microsoft\Windows\CurrentVersion\Run
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reg query HKCU\Software\Microsoft\Windows\CurrentVersion\Run
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reg query HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce
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reg query HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce
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```
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## CLI Usage
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```bash
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python agent.py --input sysmon_events.json --output report.json
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python agent.py --input registry_snapshot.json --output report.json
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```
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## MITRE ATT&CK Reference
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- **Technique**: T1547.001 - Boot or Logon Autostart Execution: Registry Run Keys
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- **Tactic**: Persistence
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- **Platforms**: Windows
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- **Detection**: Sysmon Event 13, Windows Security Event 4657
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## References
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- Sysmon Event 13: https://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventid=90013
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- Splunk Detection: https://research.splunk.com/endpoint/f5f6af30-7aa7-4295-bfe9-07fe87c01a4b/
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- Nextron T1547.001: https://www.nextron-systems.com/2025/07/29/detecting-the-most-popular-mitre-persistence-method-registry-run-keys-startup-folder/
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