W32/Rbot-TV

Category: Viruses and Spyware
Type: Win32 worm
Prevalence: Small Number of Reports

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W32/Rbot-TV is a worm which attempts to spread to remote network shares. It also contains backdoor Trojan functionality allowing unauthorised remote access to the infected computer via IRC channels while running in the background as a service process.

W32/Rbot-TV spreads to network shares with weak passwords and by exploiting the LSASS(MS04-011) vulnerability.

W32/Rbot-TV can also download and execute remote files on the infected computer and flood other computers with network packets.

Sophos's anti-virus products include proactive protection technology, which can defend against new threats without requiring an update. Sophos customers have been protected against W32/Rbot-TV (detected as W32/Rbot-Fam) since version 3.88. W32/Rbot-TV is a worm which attempts to spread to remote network shares. It also contains backdoor Trojan functionality allowing unauthorised remote access to the infected computer via IRC channels while running in the background as a service
process.

W32/Rbot-TV moves itself to the Windows system folder as wmstu.exe and creates the following registry entries to ensure it is run at system logon:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
*wmstu
wmstu.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
*wmstu
wmstu.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
*wmstu
wmstu.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
*wmstu
wmstu.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
*wmstu
wmstu.exe

W32/Rbot-TV will also set the following registry entries:

HKLM\Software\Microsoft\Ole
EnableDCOM
N

HKLM\System\CurrentControlSet\Control\Lsa
restrictanonymous
1

HKLM\Software\Microsoft\Windows NT\CurrentVersion\SystemRestore
DisableSR
1

W32/Rbot-TV spreads to network shares with weak passwords and by exploiting the LSASS(MS04-011) vulnerability.

W32/Rbot-TV can also download and execute remote files on the infected computer and flood other computers with network packets.

Sophos's anti-virus products include proactive protection technology, which can defend against new threats without requiring an update. Sophos customers have been protected against W32/Rbot-TV (detected as W32/Rbot-Fam) since version 3.88.

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