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Virus:TR/Kazy.31951.1
Date discovered:25/07/2011
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:168.960 Bytes
MD5 checksum:5C06EEE2D31F0E4AF6231B0D9E84806B
VDF version:7.11.12.81 - Monday, July 25, 2011
IVDF version:7.11.12.81 - Monday, July 25, 2011

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Backdoor.Win32.Gbot.nfv
   •  TrendMicro: BKDR_CYCBOT.SME3
     Microsoft: Backdoor:Win32/Cycbot.B


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


Side effects:
   • Drops files
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %APPDATA%\Microsoft\conhost.exe



The following file is created:

%APPDATA%\Microsoft\stor.cfg

 Registry One of the following values is added in order to run the process after reboot:

  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "conhost"="%APPDATA%\Microsoft\conhost.exe"



The following registry key is added:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
   • "ProxyServer"="http=127.0.0.1:%number%"



The following registry keys are changed:

[HKLM\SYSTEM\ControlSet001\Hardware Profiles\0001\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:00000001

[HKLM\SYSTEM\ControlSet001\Hardware Profiles\Current\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:00000001

[HKLM\SYSTEM\CurrentControlSet\Hardware Profiles\0001\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:00000001

[HKLM\SYSTEM\CurrentControlSet\Hardware Profiles\Current\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:00000001

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:00000001

 Backdoor The following port is opened:

%executed file% on a random TCP port in order to provide a proxy server.


Contact server:
All of the following:
   • http://**********anesegreenteaonline.com/assets/images/greentea-cha-1.gif?v85=75&tq=gJ**********
   • http://**********multstoryonline.com/blog/images/3521.jpg?v55=19&tq=gK**********


 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 Thursday, October 27, 2011
Description updated by Andrei Ivanes on Friday, November 4, 2011

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