high
Summary
Summary
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| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 1 September 2006 12:54:50 (GMT) |
| Detected by | All Sophos products |
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W32/Vanebot-I is a worm and IRC backdoor Trojan for the Windows platform.
W32/Vanebot-I attempts to spread via MSN Messenger, by copying itself to remote network shares with weak passwords and by exploiting any of the following vulnerabilities: SRVSVC (MS06-040), Psyme, PNP (MS05-039), ASN.1 (MS04-007).
W32/Vanebot-I 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/Vanebot-I is a worm and IRC backdoor Trojan for the Windows platform.
W32/Vanebot-I attempts to spread via MSN Messenger, by copying itself to remote network shares with weak passwords and by exploiting any of the following vulnerabilities: SRVSVC (MS06-040), Psyme, PNP (MS05-039), ASN.1 (MS04-007).
W32/Vanebot-I 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.
When first run W32/Vanebot-I copies itself to <System>\msijavaup32.exe.
The following registry entries are created to run msijavaup32.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices
Ms Java for Windows NT
msijavaup32.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Ms Java for Windows NT
msijavaup32.exe
The following registry entry is changed to run msijavaup32.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Shell
Explorer.exe msijavaup32.exe
(The default value for this registry entry is "Explorer.exe" which causes the Microsoft file <Windows>\Explorer.exe to be run on startup.)
W32/Vanebot-I sets the following registry entries, disabling the automatic startup of other software:
HKLM\SYSTEM\CurrentControlSet\Services\wuauserv
Start
4
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
4
Note: disabling autostart for the SharedAccess service deactivates the Microsoft Internet Connection Firewall (ICF).
Registry entries are set as follows:
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Userinit
<System>\userinit.exe,msijavaup32.exe
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
lmcompatibilitylevel
1
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1
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