W32/Rbot-CMS is a worm for the Windows platform.
The worm contains backdoor functions that allows unauthorized remote access to the infected computer via IRC channels while running in the background.
W32/Rbot-CMS spreads
- to computers vulnerable to common exploits, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049), PNP (MS05-039) and ASN.1 (MS04-007)
- to MSSQL servers protected by weak passwords
- to network shares
The following patches for the operating system vulnerabilities exploited by the worm can be obtained from the Microsoft website:
MS04-011
MS04-012
MS03-049
MS05-039
MS04-007
When first run W32/Rbot-CMS copies itself to <System>\omns.exe.
The following registry entries are created to run omns.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Omni
omns.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Omni
omns.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices
Omni
omns.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Omni
omns.exe
Registry entries are set as follows:
HKCU\SYSTEM\CurrentControlSet\Control\Lsa
Omni
omns.exe
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
Omni
omns.exe
HKCU\Software\Microsoft\OLE
Omni
omns.exe
HKLM\SOFTWARE\Microsoft\Ole
Omni
omns.exe