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Virus:TR/Dldr.Kazy.BC
Date discovered:02/02/2011
Type:Trojan
Subtype:Downloader
In the wild:No
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:182.272 Bytes
MD5 checksum:9caf5da08ab00b81b5293f7a320810bc
VDF version:7.10.08.110
IVDF version:7.11.02.55 - Wednesday, February 2, 2011

 General Aliases:
   •  Kaspersky: Backdoor.Win32.Gbot.dkj
   •  Bitdefender: Gen:Trojan.Heur.KS.1
   •  Eset: Win32/Kryptik.KFV
   •  GData: Gen:Trojan.Heur.KS.1
   •  DrWeb: Trojan.DownLoader1.62583


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


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %HOME%\Application Data\dwm.exe



The following file is created:

– %HOME%\Application Data\C826.657

 Registry The following registry key is added in order to run the process after reboot:

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

 Miscellaneous  Checks for an internet connection by contacting the following web site:
   • http://www.google.com
Accesses internet resources:
   • http://iphonefirmware.com/wp-content/uploads/2010/06/**********?tq=%character string%
   • http://zonetf.com/**********?tq=%character string%
   • http://zonetk.com/images/**********?tq=%character string%
   • http://zonere.com/images/**********?tq=%character string%
   • http://onloneservermonitoring.com/images/**********?tq=%character string%
   • http://zonetk.com/images/**********?tq=%character string%
   • http://offlineservermonitoring.com/images/**********?tq=%character string%
   • http://zonetf.com/**********?tq=%character string%

 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 a runtime packer.

Description inserted by Petre Galan on Thursday, May 19, 2011
Description updated by Petre Galan on Thursday, May 19, 2011

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