TROJ_DROPPER.ADO

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Remove the malware/grayware file that dropped/downloaded TROJ_DROPPER.ADO

• TROJ_ADOBFP.B

Step 3

Remove malware files dropped/downloaded by TROJ_DROPPER.ADO

• BKDR_COSMU.KO

Step 4

Identify and terminate files detected as TROJ_DROPPER.ADO

1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 5

Delete this registry value

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_XMLPROV\0000
  • Service = "xmlprov"
• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_XMLPROV\0000
  • Legacy = "1"
• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_XMLPROV\0000
  • ConfigFlags = "0"
• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_XMLPROV\0000
  • Class = "LegacyDriver"
• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_XMLPROV\0000
  • ClassGUID = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"
• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\xmlprov\Enum
  • 0 = "Root\LEGACY_XMLPROV\0000"
• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\xmlprov\Enum
  • Count = "1"
• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\xmlprov\Enum
  • NextInstance = "1"
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • DependOnService = "RpcSs"
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • Description = "Manages XML configuration files on a domain basis for automatic network provisioning."
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • DisplayName = "Network Provisioning Service"
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • ErrorControl = "1"
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • ImagePath = "%System Root%\System32\svchost.exe -k netsvcs"
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • ObjectName = "LocalSystem"
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • Start = "2"
• In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WinKernel
  • Type = "20"

Step 6

Restore this modified registry value

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

• In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\xmlprov\Parameters
  • From: ServiceDll = "%System%\xmlprovsvc.dll"
    To: ServiceDll = "%System%\xmlprov.dll"

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DROPPER.ADO. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.