high
Summary
Summary
Action- More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 20 August 2005 13:54:52 (GMT) |
| Detected by | All Sophos products |
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Action
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More Information
W32/Tilebot-L is a worm and IRC backdoor Trojan for the Windows platform.
W32/Tilebot-L spreads to other network computers by exploiting common buffer overflow vulnerabilites, which may include: PNP (MS05-039) and MSSQL (MS02-039).
W32/Tilebot-L 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-L includes functionality to access the internet and communicate with a remote server via HTTP.
When first run W32/Tilebot-L copies itself to <Windows>\sysdat.exe and creates the file <System>\lpdriver.sys, which is a corrupt file.
W32/Tilebot-L will attempt to register the file lpdriver.sys as a new system driver service named "Lpdriver", with a display name of "Lpdriver". Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\Lpdriver\
The file sysdat.exe is registered as a new system driver service named "VIRUS", with a display name of "change me please", a description of "this is it, you're dead" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\VIRUS\
and
HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_VIRUS\
W32/Tilebot-L 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\Policies\Microsoft\Windows\WindowsUpdate
DoNotAllowXPSP2
1
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N
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\
Sophos's anti-virus products include Genotype™ detection technology, which can proactively protect against new threats without requiring an update. Sophos customers have been protected against W32/Tilebot-L (detected as W32/Tilebot-Gen) since version 3.94.
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