Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:TR/Buzus.EC.41
Date discovered:15/05/2011
Type:Trojan
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:7.11.08.22 - Sunday, May 15, 2011
IVDF version:7.11.08.22 - Sunday, May 15, 2011

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  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\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   • "%executed file%" = "%WINDIR%\nvsvc32.exe:*:Enabled:NVIDIA
      driver monitor"



The following registry keys are changed:

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   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: **********n2.no-ip.info
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:
   • browseusers.myspace.com/Browse/Browse.aspx
   • www.myspace.com/browse/people
   • www.myspace.com/help/browserunsupported
   • x.myspacecdn.com/images/BrowserUpgrade/bg_infobox.jpg
   • x.myspacecdn.com/images/BrowserUpgrade/icon_information.gif
   • x.myspacecdn.com/images/BrowserUpgrade/browserLogos_med.jpg
   • x.myspacecdn.com/modules/splash/static/img/cornersSheet.png
   • x.myspacecdn.com/images/BrowserUpgrade/bg_browserSection.jpg

 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

Back . . . .