W32/Rbot-AVH is a worm and IRC backdoor Trojan for the Windows platform.
W32/Rbot-AVH spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WebDav (MS03-007), UPNP (MS01-059), Dameware (CAN-2003-1030) and PNP (MS05-039) and by copying itself to network shares protected by weak passwords.
The following patches for the operating system vulnerabilities exploited by W32/Rbot-AVH can be obtained from the Microsoft website:
MS04-011
MS04-012
MS03-007
MS01-059
MS05-039
W32/Rbot-AVG 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-AVG copies itself to <System>\wiinlogon.exe and creates the file <System>\svkp.sys.
The following registry entries are created to run wiinlogon.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
SYSTEM
wiinlogon.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
SYSTEM
wiinlogon.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
SYSTEM
wiinlogon.exe
Registry entries are set as follows:
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N
HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1