W32/Vanebot-S is a worm for the Windows platform. W32/Vanebot-S also contains IRC backdoor Trojan functionality which allows a remote intruder to gain access and control over the computer.
W32/Vanebot-S spreads
to computers vulnerable to common exploits, including SRVSVC (MS06-040)
to MSSQL servers protected by weak passwords
to network shares
via MSN Messenger
via Yahoo Instant Messenger
W32/Vanebot-S is a worm for the Windows platform. W32/Vanebot-S also contains IRC backdoor Trojan functionality which allows a remote intruder to gain access and control over the computer.
W32/Vanebot-S spreads
to computers vulnerable to common exploits, including SRVSVC (MS06-040)
to MSSQL servers protected by weak passwords
to network shares
via MSN Messenger
via Yahoo Instant Messenger
W32/Vanebot-S may spread with the filename redworld.exe, redworld2.exe or <random numbers>_redworld2.exe.
When first run W32/Vanebot-S copies itself to <Windows system folder>\dllcache\msiupdate32.exe.
The file msiupdate32.exe is registered as a new system driver service named "Microsoft update Service", with a display name of "Microsoft update 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\Microsoft update Service\
W32/Vanebot-S 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\SYSTEM\CurrentControlSet\Control\Lsa
lmcompatibilitylevel
1
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1
W32/Vanebot-S attempts to terminate a number of processes related to security
and anti-virus applications.