W32/Tilebot-GW is a worm and IRC backdoor Trojan for the Windows platform.
W32/Tilebot-GW spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), SRVSVC (MS06-040), RPC-DCOM (MS04-012), PNP (MS05-039) and ASN.1 (MS04-007).
W32/Tilebot-GW 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-GW includes functionality to access the internet and communicate with a remote server via HTTP.
W32/Tilebot-GW is a worm and IRC backdoor Trojan for the Windows platform.
W32/Tilebot-GW spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), SRVSVC (MS06-040), RPC-DCOM (MS04-012), PNP (MS05-039) and ASN.1 (MS04-007).
W32/Tilebot-GW 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-GW includes functionality to access the internet and communicate with a remote server via HTTP.
When first run W32/Tilebot-GW copies itself to <Windows>\smsc.exe.
The file smsc.exe is registered as a new system driver service named "smsc", with a display name of "smsc" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\smsc\
W32/Tilebot-GW modifies the following files, affecting the command line file transfers:
<System>\ftp.exe
<System>\tftp.exe
W32/Tilebot-GW may modify the following file in order to prevent Windows File Protection from noticing the above modifications:
<System>\sfc_os.dll
The following registry entries are set, disabling the registry editor (regedit) and the Windows task manager (taskmgr):
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1
W32/Tilebot-GW 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\Microsoft\Windows NT\CurrentVersion\Winlogon
SFCScan
0
HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
DoNotAllowXPSP2
1
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
SFCDisable
ffffff9d
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\