Troj/Jupdrop-B

Please follow the instructions for removing Trojans.

Windows 2000

You will first need to prevent use of the following registry entry, if it is present. Please read the warning about editing the registry.

• At the taskbar, click Start|Run. Type 'REGEDT32' and press Return. The registry editor opens.
• Before you edit the registry, you should make a backup. Select the 'HKEY_LOCAL_MACHINE on local machine' window. Select 'HKEY_LOCAL_MACHINE'. On the 'Registry' menu, click 'Save Subtree As'. Save the registry subtree as Backup.
• Select SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify
• Select \<Trojan_entry>
• On the Security menu select 'Permissions'
• In 'Permissions for...' deselect 'Allow inheritable permissions from parent to propagate to this object'
• In the Security dialog, click 'Remove'
• Click 'OK'
• Click 'Yes' to deny everyone access to the key
• Close the registry editor.

Follow the Safe Mode with Command Prompt instructions for removing Trojans.

Re-open the registry editor to delete the Trojan registry entries.

• At the taskbar, click Start|Run. Type 'REGEDT32' and press Return. The registry editor opens.
• Select SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify
• Select \<Trojan_entry>
• On the Security menu select 'Permissions'
• In 'Permissions for...' select 'Allow inheritable permissions from parent to propagate to this object'
• Click 'OK'
• On the Edit menu select 'Delete'
• Click 'Yes' to delete the key
• ****Select and delete any other necessary keys****
• Close the registry editor.

Windows XP/2003

You will first need to prevent use of the following registry entry, if it is present. Please read the warning about editing the registry.

• At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.
• Before you edit the registry, you should make a backup. Select 'My Computer'. On the 'File' menu, click 'Export'. Save your registry as Backup.
• Select HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify
• Right-click '<Trojan_entry>'
• Select 'Permissions'
• In the 'Permissions for...' dialog, click 'Advanced'
• In the 'Advanced Security Settings for...' dialog, deselect 'Inherit from parent the permission entries that apply to child objects.'
• In the Security dialog, click 'Remove'
• Click 'OK'
• Click 'Yes' to deny everyone access to the key
• Click 'OK'
• Close the registry editor.

Follow the Safe Mode with Command Prompt instructions for removing Trojans.

Re-open the registry editor to delete the Trojan registry entries.

• At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.
• Select HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify
• Right-click '<Trojan_entry>'
• Select 'Permissions'
• In the 'Permissions for...' dialog, click 'Advanced'
• In the 'Advanced Security Settings for...' dialog, select 'Inherit from parent the permission entries that apply to child objects.'
• Click 'OK' twice
• Right-click '<Trojan_entry>'
• Select 'Delete'
• Click 'Yes' to delete the key
• ****Select and delete any other necessary keys****
• Close the registry editor.

Troj/Jupdrop-B is a dropper Trojan for the Windows platform.

The Trojan contains functionality to download files and access to the Internet.

When Troj/Jupdrop-B is installed the following files are created:

<System>\mspostsp.exe
<System>\msupdate32.dll

The file mspostsp.exe is detected as Troj/Jupdrop-A.

The following registry entries are created to run code exported by msupdate32.dll on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\msupdate
DllName
msupdate32.dll

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\msupdate
Startup
WinlogonStartupEvent

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\msupdate
Impersonate
0