Virus:TR/Zlob.JW
Date discovered:12/02/2007
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low
Static file:No
File size:~ 19.000 Bytes
IVDF version:6.37.01.73 - Monday, February 12, 2007

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Mcafee: Puper trojan
   •  Kaspersky: Trojan-Downloader.Win32.Zlob.kof
   •  F-Secure: Trojan-Downloader:W32/Zlob.HPU
   •  Grisoft: Pakes.Q
   •  Eset: Win32/TrojanDownloader.Zlob.BSX trojan
   •  Bitdefender: Trojan.Downloader.Zlob.ABRJ


Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops malicious files
   • Registry modification

 Files The following files are created:

– c:\sbmdl.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Zlob.JW

– c:\sbsm.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: TR/Dldr.Zlob.kog

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\explorer\
   run]
   • "start"="%malware execution directory%\%executed file%"



It registers a browser helper object (BHO) by adding the following key:

– [HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\
   Browser Helper Objects\{7C109800-A5D5-438F-9640-18D17E168B88}]
   • "(Default)"=""



The following registry keys are added:

– [HKLM\SOFTWARE\Microsoft\Internet Explorer\Extensions\
   {9034A523-D068-4BE8-A284-9DF278BE776E}]
   • "MenuText"="IE Anti-Spyware"
   • "Exec"="http://www.ieservicegate.com/redirect.php"
   • "CLSID"="{1FBA04EE-3024-11d2-8F1F-0000F87ABD16}"

– [HKCU\Software\Microsoft\Internet Explorer\SearchScopes]
   • "DefaultScope"="{DAED9266-8C28-4C1C-8B58-5C66EFF1D302}"

 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 Thomas Wegele on Thursday, April 17, 2008
Description updated by Thomas Wegele on Thursday, April 17, 2008

Back . . . .