W32/Rbot-APX

Please follow the instructions for removing worms.

Please read the instructions for removing W32/Rbot-APX

W32/Rbot-APX is a worm and IRC backdoor Trojan for the Windows platform.

W32/Rbot-APX spreads:

- to other network computers infected with: Troj/Kuang, Troj/Sub7, Troj/NetDevil, W32/MyDoom, W32/Bagle and Troj/Optix
- to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812), WebDav (MS03-007), IIS5SSL (MS04-011) (CAN-2003-0719), UPNP (MS01-059), Veritas (CAN-2004-1172), Dameware (CAN-2003-1030) and ASN.1 (MS04-007)
- to other network computers running MSSQL servers protected by weak passwords
- by copying itself to network shares protected by weak passwords

W32/Rbot-APX 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-APX copies itself to <System>\scrhost.exe.

The following registry entries are created to run scrhost.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Windows Update
scrhost.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Windows Update
scrhost.exe

Registry entries are set as follows:

HKCU\Software\Microsoft\OLE
Microsoft Windows Update
scrhost.exe

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

W32/Rbot-APX attempts to terminate processes related to certain anti-virus and security programs.