Event ID - 4321

Port No4321
Service NameBo-Bo
RFC Doc0
ProtocolTCP
DescriptionBo-Bo 1.0 Final Beta has a client very similar to Back Orifice. This trojan does not have many features and is probably not used much at all any more
Reference LinkBo-Bo Trojan
AttackIt autoloads the Registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ Key: DirectLibarySupport

It does the following :
File list, delete, download, upload
Get ICQ passwords
Get PWL passwords
Get system info
Goto URL
Ping
Process show, kill, run
Reboot
Send message

Removal :
1.Remove the DirectLibarySupport key in the registry located at HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run And everything under ICQ Accel in the registry located at HKEY_USERS\.Default\Software\Mirabilis\ICQ\Agent\Apps\ Which can be done with regedit or any other registry editing program
2. Reboot the computer or close Dllclient.exe.
3. Delete the trojan file Dllclient.exe in the windows system directory.

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