W32/Tilebot-FC

Please follow the instructions for removing worms.

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

W32/Tilebot-FC spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812) and ASN.1 (MS04-007).

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

When first run W32/Tilebot-FC copies itself to <Windows>\cpanelx.exe and creates the file <System>\hpdriver.sys.

The file hpdriver.sys is detected as Troj/Rootkit-AA.

The file cpanelx.exe is registered as a new system driver service named "Microsoft Control Panel", with a display name of "cpanelx" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\Microsoft Control Panel\

The file hpdriver.sys is registered as a new system driver service named "hpdriver", with a display name of "hpdriver". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\hpdriver\

W32/Tilebot-FC 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\