high
Summary
Summary
Action- More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 25 August 2006 20:21:52 (GMT) |
| Last updated | 5 October 2006 08:45:49 (GMT) |
| Detected by | All Sophos products |
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W32/Tilebot-GI is a worm and backdoor for the Windows platform.
W32/Tilebot-GI spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), SRVSVC (MS06-040), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812), PNP (MS05-039) and ASN.1 (MS04-007).
W32/Tilebot-GI 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-GI includes functionality to access the internet and communicate
with a remote server via HTTP.
W32/Tilebot-GI modifies the system file checker and may attempt to scan for and terminate certain anti-virus applications. W32/Tilebot-GI is a worm and backdoor for the Windows platform.
W32/Tilebot-GI spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), SRVSVC (MS06-040), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812), PNP (MS05-039) and ASN.1 (MS04-007).
W32/Tilebot-GI 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-GI includes functionality to access the internet and communicate with a remote server via HTTP.
When first run W32/Tilebot-GI copies itself to <Windows folder>\sql-smss.exe.
The file <Windows folder>\sql-smss.exe is registered as a new system driver service named "sql-smss", with a display name of "sql-smss" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\sql-smss\
W32/Tilebot-GI modifies the following files, affecting the system file checker and command line file transfers:
<Windows system folder>\sfc_os.dll
<Windows system folder>\ftp.exe
<Windows system folder>\tftp.exe
W32/Tilebot-GI may attempt to scan for and terminate certain anti-virus applications.
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-GI 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\
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