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Summary
Summary
Action- More Information
| How it spreads |
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|---|---|
| Affected operating systems | Windows |
| Characteristics |
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| Protection available since | 25 January 2005 08:47:24 (GMT) |
| Detected by | All Sophos products |
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Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
Change any data that may have become compromised.
You will also need to edit the following registry entries, if they are present. Please read the warning about editing the registry.
At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.
Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.
Locate the HKEY_LOCAL_MACHINE entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
and remove any reference to any file you deleted.
Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:
HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\Run\
and remove any reference to any file you deleted.
Close the registry editor.
More Information
W32/Rbot-UI is a Windows network worm which attempts to spread via network shares. The worm contains backdoor functions that allow unauthorised remote access to the infected computer via IRC channels while running in the background.
The worm spreads to network shares with weak passwords and also by using the LSASS security exploit (MS04-011) and RPC-DCOM security exploit (MS03-039).
When run W32/Rbot-UI moves itself to the Windows System folder as a hidden, read-only, system file named npfw.exe.
The worm then creates the following registry entries so as to run itself on computer logon:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Norton Personal Firewall
npfw.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
Norton Personal Firewall
npfw.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Norton Personal Firewall
npfw.exe
Once installed, W32/Rbot-UI will attempt to participate in denial of service (DoS) attacks, download and run files from the internet, steal CD keys, log keystrokes and login to MS SQL servers and send EXEC commands to open a command shell when instructed to do so by a remote attacker.
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