high
Summary
Summary
Action- More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 21 October 2005 04:41:19 (GMT) |
| Last updated | 5 January 2006 11:17:28 (GMT) |
| Detected by | All Sophos products |
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Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
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 entries:
HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\Run\
HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\RunServices\
and remove any reference to any file you deleted.
Close the registry editor.
More Information
W32/Rbot-ASW is an IRC worm and backdoor Trojan for the Windows platform.
W32/Rbot-ASW may spread by copying itself to network shares or by exploiting the vulnerabilities LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049), WebDav (MS03-007), IIS5SSL (MS04-011), UPNP (MS01-059), Veritas (CAN-2004-1172), Dameware (CAN-2003-1030) or ASN.1 (MS04-007).
W32/Rbot-ASW 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/Rbot-ASW copies itself to <System>\syshost.exe.
The following registry entries are created to run syshost.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Windows System
syshost.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Windows System
syshost.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Windows System
syshost.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Windows System
syshost.exe
Registry entries are set as follows:
HKCU\Software\Microsoft\OLE
Microsoft Windows System
syshost.exe
HKLM\SOFTWARE\Microsoft\Ole
Microsoft Windows System
syshost.exe
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
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