W32/Tilebot-HF

Please follow the instructions for removing worms.

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

W32/Tilebot-HF spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: SRVSVC (MS06-040), LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812), PNP (MS05-039) and ASN.1 (MS04-007). The worm may also spreads via network shares and MSSQL servers protected by weak passwords.

W32/Tilebot-HF 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-HF includes functionality to access the internet and communicate with a remote server via HTTP. W32/Tilebot-HF is a worm and IRC backdoor Trojan for the Windows platform.

W32/Tilebot-HF spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: SRVSVC (MS06-040), LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812), PNP (MS05-039) and ASN.1 (MS04-007). The worm may also spread via network shares and MSSQL servers protected by weak passwords.

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

When first run W32/Tilebot-HF copies itself to <Windows>\realplayers.exe and creates the file <System>\rdriv.sys.

The file rdriv.sys is detected as Troj/Rootkit-W.

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

HKLM\SYSTEM\CurrentControlSet\Services\rdriv\

The file realplayers.exe is registered as a new system driver service named "trojans", with a display name of "this change me" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\trojans\

W32/Tilebot-HF 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

Additional registry entries are set as follows:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
Installed Time Me
<Date and Time>

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
Record Me
272962

HKLM\SOFTWARE\Microsoft\Security Center
AntiVirusDisableNotify
1

HKLM\SOFTWARE\Microsoft\Security Center
AntiVirusOverride
1

HKLM\SOFTWARE\Microsoft\Security Center
FirewallDisableNotify
1

HKLM\SOFTWARE\Microsoft\Security Center
FirewallOverride
1

HKLM\SOFTWARE\Microsoft\Security Center
UpdatesDisableNotify
1

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

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
EnableFirewall
0

HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile
EnableFirewall
0

HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters
AutoShareServer
0

HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters
AutoShareWks
0

HKLM\SYSTEM\CurrentControlSet\Services\lanmanworkstation\parameters
AutoShareServer
0

HKLM\SYSTEM\CurrentControlSet\Services\lanmanworkstation\parameters
AutoShareWks
0

HKLM\SYSTEM\CurrentControlSet\Control\
WaitToKillServiceTimeout
7000

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1