darkcomet | 1164de18c44320bc1d92310c7002185d2a06f45bba23500dd0ad88767cee9352

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsc.exe"	nigger.exe

Modifies firewall policy service 3 TTPs 6 IoCs

Modify Registry

Windows Service

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	iexplore.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	msdcsc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	iexplore.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	iexplore.exe

Modifies security service 2 TTPs 2 IoCs

Modify Registry

Windows Service

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	iexplore.exe

Windows security bypass 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	iexplore.exe

Disables RegEdit via registry modification 2 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe

Disables Task Manager via registry modification
evasion

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

Hidden Files and Directories

T1564.001

pid	Process
968	attrib.exe
1372	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
3036	msdcsc.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Windows\CurrentVersion\Run\realtekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsc.exe"	nigger.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Windows\CurrentVersion\Run\realtekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Software\Microsoft\Windows\CurrentVersion\Run\realtekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsc.exe"	iexplore.exe

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Control Panel\Desktop\Wallpaper	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg"	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3036 set thread context of 1416	3036	msdcsc.exe	86

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 18 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nigger.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	nigger.exe

Runs net.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1416	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3988	nigger.exe
Token: SeSecurityPrivilege	3988	nigger.exe
Token: SeTakeOwnershipPrivilege	3988	nigger.exe
Token: SeLoadDriverPrivilege	3988	nigger.exe
Token: SeSystemProfilePrivilege	3988	nigger.exe
Token: SeSystemtimePrivilege	3988	nigger.exe
Token: SeProfSingleProcessPrivilege	3988	nigger.exe
Token: SeIncBasePriorityPrivilege	3988	nigger.exe
Token: SeCreatePagefilePrivilege	3988	nigger.exe
Token: SeBackupPrivilege	3988	nigger.exe
Token: SeRestorePrivilege	3988	nigger.exe
Token: SeShutdownPrivilege	3988	nigger.exe
Token: SeDebugPrivilege	3988	nigger.exe
Token: SeSystemEnvironmentPrivilege	3988	nigger.exe
Token: SeChangeNotifyPrivilege	3988	nigger.exe
Token: SeRemoteShutdownPrivilege	3988	nigger.exe
Token: SeUndockPrivilege	3988	nigger.exe
Token: SeManageVolumePrivilege	3988	nigger.exe
Token: SeImpersonatePrivilege	3988	nigger.exe
Token: SeCreateGlobalPrivilege	3988	nigger.exe
Token: 33	3988	nigger.exe
Token: 34	3988	nigger.exe
Token: 35	3988	nigger.exe
Token: 36	3988	nigger.exe
Token: SeIncreaseQuotaPrivilege	3036	msdcsc.exe
Token: SeSecurityPrivilege	3036	msdcsc.exe
Token: SeTakeOwnershipPrivilege	3036	msdcsc.exe
Token: SeLoadDriverPrivilege	3036	msdcsc.exe
Token: SeSystemProfilePrivilege	3036	msdcsc.exe
Token: SeSystemtimePrivilege	3036	msdcsc.exe
Token: SeProfSingleProcessPrivilege	3036	msdcsc.exe
Token: SeIncBasePriorityPrivilege	3036	msdcsc.exe
Token: SeCreatePagefilePrivilege	3036	msdcsc.exe
Token: SeBackupPrivilege	3036	msdcsc.exe
Token: SeRestorePrivilege	3036	msdcsc.exe
Token: SeShutdownPrivilege	3036	msdcsc.exe
Token: SeDebugPrivilege	3036	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	3036	msdcsc.exe
Token: SeChangeNotifyPrivilege	3036	msdcsc.exe
Token: SeRemoteShutdownPrivilege	3036	msdcsc.exe
Token: SeUndockPrivilege	3036	msdcsc.exe
Token: SeManageVolumePrivilege	3036	msdcsc.exe
Token: SeImpersonatePrivilege	3036	msdcsc.exe
Token: SeCreateGlobalPrivilege	3036	msdcsc.exe
Token: 33	3036	msdcsc.exe
Token: 34	3036	msdcsc.exe
Token: 35	3036	msdcsc.exe
Token: 36	3036	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	1416	iexplore.exe
Token: SeSecurityPrivilege	1416	iexplore.exe
Token: SeTakeOwnershipPrivilege	1416	iexplore.exe
Token: SeLoadDriverPrivilege	1416	iexplore.exe
Token: SeSystemProfilePrivilege	1416	iexplore.exe
Token: SeSystemtimePrivilege	1416	iexplore.exe
Token: SeProfSingleProcessPrivilege	1416	iexplore.exe
Token: SeIncBasePriorityPrivilege	1416	iexplore.exe
Token: SeCreatePagefilePrivilege	1416	iexplore.exe
Token: SeBackupPrivilege	1416	iexplore.exe
Token: SeRestorePrivilege	1416	iexplore.exe
Token: SeShutdownPrivilege	1416	iexplore.exe
Token: SeDebugPrivilege	1416	iexplore.exe
Token: SeSystemEnvironmentPrivilege	1416	iexplore.exe
Token: SeChangeNotifyPrivilege	1416	iexplore.exe
Token: SeRemoteShutdownPrivilege	1416	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1416	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3988 wrote to memory of 4412	3988	nigger.exe	79
PID 3988 wrote to memory of 4412	3988	nigger.exe	79
PID 3988 wrote to memory of 4412	3988	nigger.exe	79
PID 3988 wrote to memory of 1292	3988	nigger.exe	81
PID 3988 wrote to memory of 1292	3988	nigger.exe	81
PID 3988 wrote to memory of 1292	3988	nigger.exe	81
PID 4412 wrote to memory of 1372	4412	cmd.exe	83
PID 4412 wrote to memory of 1372	4412	cmd.exe	83
PID 4412 wrote to memory of 1372	4412	cmd.exe	83
PID 1292 wrote to memory of 968	1292	cmd.exe	84
PID 1292 wrote to memory of 968	1292	cmd.exe	84
PID 1292 wrote to memory of 968	1292	cmd.exe	84
PID 3988 wrote to memory of 3036	3988	nigger.exe	85
PID 3988 wrote to memory of 3036	3988	nigger.exe	85
PID 3988 wrote to memory of 3036	3988	nigger.exe	85
PID 3036 wrote to memory of 1416	3036	msdcsc.exe	86
PID 3036 wrote to memory of 1416	3036	msdcsc.exe	86
PID 3036 wrote to memory of 1416	3036	msdcsc.exe	86
PID 3036 wrote to memory of 1416	3036	msdcsc.exe	86
PID 3036 wrote to memory of 1416	3036	msdcsc.exe	86
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 1580	1416	iexplore.exe	87
PID 1416 wrote to memory of 680	1416	iexplore.exe	88
PID 1416 wrote to memory of 680	1416	iexplore.exe	88
PID 1416 wrote to memory of 680	1416	iexplore.exe	88
PID 680 wrote to memory of 2080	680	cmd.exe	90
PID 680 wrote to memory of 2080	680	cmd.exe	90
PID 680 wrote to memory of 2080	680	cmd.exe	90
PID 2080 wrote to memory of 2216	2080	net.exe	91
PID 2080 wrote to memory of 2216	2080	net.exe	91
PID 2080 wrote to memory of 2216	2080	net.exe	91
PID 1416 wrote to memory of 3276	1416	iexplore.exe	92
PID 1416 wrote to memory of 3276	1416	iexplore.exe	92
PID 1416 wrote to memory of 3276	1416	iexplore.exe	92
PID 3276 wrote to memory of 4044	3276	cmd.exe	95
PID 3276 wrote to memory of 4044	3276	cmd.exe	95
PID 3276 wrote to memory of 4044	3276	cmd.exe	95
PID 4044 wrote to memory of 4572	4044	net.exe	96
PID 4044 wrote to memory of 4572	4044	net.exe	96
PID 4044 wrote to memory of 4572	4044	net.exe	96
PID 1416 wrote to memory of 2816	1416	iexplore.exe	97
PID 1416 wrote to memory of 2816	1416	iexplore.exe	97
PID 1416 wrote to memory of 2816	1416	iexplore.exe	97
PID 2816 wrote to memory of 1776	2816	cmd.exe	99

System policy modification 1 TTPs 3 IoCs

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	msdcsc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	msdcsc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs

Hidden Files and Directories

T1564.001

pid	Process
968	attrib.exe
1372	attrib.exe

C:\Users\Admin\AppData\Local\Temp\nigger.exe
"C:\Users\Admin\AppData\Local\Temp\nigger.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\nigger.exe" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4412
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\nigger.exe" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:1372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1292
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:968
- C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsc.exe
  "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsc.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - Windows security bypass
  - Disables RegEdit via registry modification
  - Executes dropped EXE
  - Windows security modification
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:3036
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Modifies firewall policy service
    - Modifies security service
    - Windows security bypass
    - Disables RegEdit via registry modification
    - Adds Run key to start application
    - Sets desktop wallpaper using registry
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1416
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      System Location Discovery: System Language Discovery
      PID:1580
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k net stop uxsms
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:680
    - - C:\Windows\SysWOW64\net.exe
        
        net stop uxsms
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2080
      - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 stop uxsms
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2216
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k net start uxsms
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3276
    - - C:\Windows\SysWOW64\net.exe
        
        net start uxsms
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4044
      - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 start uxsms
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4572
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k net stop uxsms
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2816
    - - C:\Windows\SysWOW64\net.exe
        
        net stop uxsms
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1776
      - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 stop uxsms
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1892
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:1568

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DisplayEnhancementService
1⤵
PID:4856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry