high
Summary
Summary
Action- More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Included in our products from | December 2005 (4.00) |
| Protection available since | 19 October 2005 11:31:58 (GMT) |
| Detected by | All Sophos products |
Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
More Information
W32/Tilebot-AE is a worm and IRC backdoor Trojan for the Windows platform.
W32/Tilebot-AE 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-AE 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-AE includes functionality to access the internet and communicate with a remote server via HTTP.
When first run W32/Tilebot-AE copies itself to <Windows>\cmdpipe.exe and creates the file <System>\rofl.sys.
The file rofl.sys is detected as Troj/RKPort-Fam.
The file cmdpipe.exe is registered as a new system driver service named "Windows Smrss Service", with a display name of "Windows Smrss Service" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\Windows Smrss Service\
The file rofl.sys is registered as a new system driver service named "rofl", with a display name of "rofl". Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\rofl\
W32/Tilebot-AE 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\
The following patches for the operating system vulnerabilities exploited by W32/Tilebot-AE can be obtained from the Microsoft website:
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