W32/Tilebot-EI

Please follow the instructions for removing worms.

W32/Tilebot-EI is a worm with backdoor functionality for the Windows platform.

W32/Tilebot-EI 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), PNP (MS05-039) and ASN.1 (MS04-007). The worm may also spreads via network shares.

W32/Tilebot-EI 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-EI includes functionality to:

- set up an FTP server
- set up a proxy server
- spread via AOL Instant Messager, MSN Messenger and Yahoo Messenger by sending messages automatically
- change Internet Explorer start page
- set or remove network shares
- port scanning
- packet sniffing
- access the internet and communicate with a remote server via HTTP
- harvest information from clipboard
- take part in Distributed Denial of Service (DDoS) attacks

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

When first run W32/Tilebot-EI copies itself to <Windows>\flash8player.

The file flash8player is registered as a new system driver service named "Macromedia Flash", with a display name of "Macromedia Flash" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\Macromedia Flash\

W32/Tilebot-EI 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

HKLM\SYSTEM\CurrentControlSet\Services\wscsvc
Start
4

Additional registry entries are set as follows:

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