W32/Tilebot-DP

Please follow the instructions for removing worms.

W32/Tilebot-DP is a worm and IRC backdoor Trojan for the Windows platform.

W32/Tilebot-DP spreads to other network computers by exploiting common buffer overflow

vulnerabilities, including: RPC-DCOM (MS04-012) and WKS (MS03-049) (CAN-2003-0812) and by copying itself to network shares protected by weak passwords.

W32/Tilebot-DP runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

W32/Tilebot-DP includes functionality to access the internet and communicate with a remote server via HTTP.

When run W32/Tilebot-DP copies itself to <Windows>\AIMClient.exe.

The file AIMClient.exe is registered as a new system driver service named "Windows Kernel Serivce", with a display name of "wkssvc" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\Windows Kernel Serivce\

W32/Tilebot-DP sets the following registry entries, disabling the automatic startup of other software:

HKLM\SYSTEM\CurrentControlSet\Services\Messenger
Start
4

HKLM\SYSTEM\CurrentControlSet\Services\RemoteRegistry
Start
4

HKLM\SYSTEM\CurrentControlSet\Services\TlntSvr
Start
4

Registry entries are set as follows:

HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
DoNotAllowXPSP2
1

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

Registry entries are created under:

HKLM\SOFTWARE\Microsoft\Security Center\
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile\