Netsys 6.8
(Backdoor.Win32.Delf.oj)
(Backdoor.Win32.GrayBird.bb)

by Zhou Jian

Written in Delphi

Released in April 2005

Made in China

more versions


Client:
port: 6678, 4777 TCP




Server:
dropped file:
c:\WINNT\system32\ZRundlll.exe
size: 498,817 bytes 

port: 4778 TCP

added to registry:
HKEY_CURRENT_USER\Software\Microsoft\ActiveMovie
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\WinOldApp
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MediaResources\msvideo
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\ZRundlll
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources\msvideo
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ZRundlll
 
 
 
 
tested on win2000
April 26, 2005

MegaSecurity