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Date discovered:15/05/2011
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:101.376 Bytes
MD5 checksum:132A989554F5E69C4E6A13D632B4F9B8
VDF version:
IVDF version:

 General Method of propagation:
   • No own spreading routine

   •  Kaspersky: Trojan-Spy.Win32.Zbot.bgxp
   •  Bitdefender: Trojan.Spy.Zbot.ESO
   •  Eset: Win32/Injector.FMH

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows Server 2008
   • Windows 7

Side effects:
   • Third party control
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\Windefend.exe

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Windows Defender"="%SYSDIR%\Windefend.exe"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Windows Defender"="%SYSDIR%\Windefend.exe"

It creates the following entry in order to bypass the Windows XP firewall:

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   • "%executed file%" = "%WINDIR%\nvsvc32.exe:*:Enabled:NVIDIA
      driver monitor"

The following registry keys are changed:

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   Old value:
   • "Start" = dword:00000001
   New value:
   • "Start" = dword:00000004

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Epoch]
   New value:
   • "Epoch"=dword:00000031

– [HKCR\TypeLib\{1EA4DBF0-3C3B-11CF-810C-00AA00389B71}\1.1\0\win32]
   New value:
   • "(Default)"="oleacc.dll"

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: **********
Port: 1337
Nickname: %random character string%

– This malware has the ability to collect and send information such as:
    • Username
    • Information about the Windows operating system

– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • disconnect from IRC server
    • Join IRC channel
    • Leave IRC channel

 Miscellaneous Accesses internet resources:

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Andrei Ilie on Tuesday, October 11, 2011
Description updated by Andrei Ilie on Wednesday, October 12, 2011

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