W32/Rbot-FZY is a worm for the Windows platform.
W32/Rbot-FZY spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), SRVSVC (MS06-040), RPC-DCOM (MS04-012), Veritas (CAN-2004-1172), ASN.1 (MS04-007) and RealVNC (CVE-2006-2369).
When first run W32/Rbot-FZY copies itself to <System>\micropoft.exe.
The following registry entries are created to run micropoft.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Windows Logon Service
micropoft.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Windows Logon Service
micropoft.exe
The following registry entry is set, affecting internet security:
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
|
|:*:Enabled:Windows Logon Service
W32/Rbot-FZY sets the following registry entries, disabling the automatic startup of other software:
HKLM\SYSTEM\CurrentControlSet\Services\wuauserv
Start
4
HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
4
Note: disabling autostart for the SharedAccess service deactivates the Microsoft Internet Connection Firewall (ICF).
Registry entries are set as follows:
HKCU\Software\Microsoft\OLE
Windows Logon Service
micropoft.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings
MaxConnectionsPer1_0Server
50
HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings
MaxConnectionsPerServer
50
HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N