Virus

W32/RBot.EP!worm

Analysis


Specifics
This is a network-aware Internet worm which spreads from system to system using Netbios TCP port 139. The virus attempts to copy itself to these shares -

C$
D$
IPC$
ADMIN$


Loading At Windows Startup
If the virus can successfully copy itself to any of these shares, it will then attempt to launch the copied virus. When the virus runs, it will register itself to auto-run at Windows startup.

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\
Microsoft Updating = wuamgrd.exe

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\
Microsoft Updating = wuamgrd.exe

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices\
Microsoft Updating = wuamgrd.exe

IRC Connection
The virus may attempt to connect with an IRC server using TCP port 6667. Once connected the virus can receive commands which could instruct the virus to extract certain registry keys related to PC game programs, scan for vulnerable systems or other actions.


Recommended Action

  • Check the main screen using the web interface for your FortiGate unit to ensure that the latest AV/NIDS database has been downloaded and installed on your system - if required, enable the "Allow Push Update" option
  • Using the FortiGate manager, block external to internal access using TCP ports 139