W32/Tilebot-EU is a worm with IRC backdoor functionality for the Windows platform.
W32/Tilebot-EU 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) and by copying itself to network shares protected by weak passwords.
W32/Tilebot-EU 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-EU includes functionality to:
set up an FTP server
set up a proxy server
spread via AOL Instant Messager by sending messages automatically
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
The following patches for operating system vulnerabilities exploited by W32/Tilebot-EU are available from Microsoft:
MS03-049
MS04-007
MS04-011
MS04-012
MS05-039
W32/Tilebot-EU is a worm with IRC backdoor functionality for the Windows platform.
W32/Tilebot-EU 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) and by copying itself to network shares protected by weak passwords.
W32/Tilebot-EU 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-EU includes functionality to:
set up an FTP server
set up a proxy server
spread via AOL Instant Messager by sending messages automatically
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
When first run W32/Tilebot-EU copies itself to <Windows folder>\alg.exe.
The file alg.exe is registered as a new system driver service named "AppLayerGatewayMgr", with a display name of "Application Layer Gateway Manager" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\AppLayerGatewayMgr\
W32/Tilebot-EU 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
The following patches for operating system vulnerabilities exploited by W32/Tilebot-EU are available from Microsoft:
MS03-049
MS04-007
MS04-011
MS04-012
MS05-039