high
Summary
Summary
Action- More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Included in our products from | August 2006 (4.08) |
| Protection available since | 21 June 2006 08:27:09 (GMT) |
| Last updated | 30 June 2006 10:29:27 (GMT) |
| Detected by | All Sophos products |
Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
If problems persist please contact technical support.
More Information
W32/Tilebot-FN is a worm and IRC backdoor Trojan for the Windows platform.
W32/Tilebot-FN spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), PNP (MS05-039) and ASN.1 (MS04-007).
W32/Tilebot-FN 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-FN includes functionality to access the internet and communicate with a remote server via HTTP.
When first run W32/Tilebot-FN copies itself to <Windows>\taskshed.exe and creates the file <System>\remon.sys. The file remon.sys can be safely deleted.
The file taskshed.exe is registered as a new system driver service named "TskScheduler", with a display name of "TskScheduler" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\TskScheduler\
The file remon.sys is registered as a new system driver service named "remon", with a display name of "remon". Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\remon\
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-FN 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\
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