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Virus:TR/Kazy.31091
Date discovered:17/07/2011
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:200.704 Bytes
MD5 checksum:C84E0EBE9E175C9089758E05AC11F4CE
VDF version:7.11.11.173 - Sunday, July 17, 2011
IVDF version:7.11.11.173 - Sunday, July 17, 2011

 General Aliases:
   •  TrendMicro: BKDR_CYCBOT.SME3
   •  Sophos: Troj/FakeAV-EFL
   •  AhnLab: Backdoor/Win32.Gbot


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


Side effects:
   • Drops files
   • Registry modification

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



The following file is created:

– %APPDATA%\%hex values%.%hex values% Contains parameters used by the malware.

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

–  [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Shell"="explorer.exe,%APPDATA%\dwm.exe"



The following registry key is added:

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

 Backdoor The following ports are opened:

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


Contact server:
The following:
   • http://**********stats.com/images/logo.png?tq=gF**********


 File details Programming language:
The malware program was written in MS Visual C++.


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • UPX

Description inserted by Andrei Ilie on Tuesday, October 25, 2011
Description updated by Andrei Ivanes on Friday, October 28, 2011

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