DR/Agent.abpb.1 - Dropper

See also

Summary

Full description

Statistics

Virus:	DR/Agent.abpb.1
Date discovered:	01/09/2008
Type:	Dropper
In the wild:	Yes
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Low to medium
Static file:	Yes
File size:	319.648 Bytes
MD5 checksum:	0cf60f6b9a43cf621f540d26128cdfab
IVDF version:	7.00.06.100 - Mon, 01 Sep 2008 17:40 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Symantec: Trojan.Dropper
   • Kaspersky: Trojan.Win32.Agent.abpb
   • F-Secure: Trojan.Win32.Agent.abpb
   • Panda: Trj/Lineage.JNT
   • Eset: Win32/Adware.Zhongsou application

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops a file
   • Drops malicious files
   • Registry modification

Files The following files are created:

– Non malicious files:
   • %PROGRAM FILES%\zzToolBar\Uninstall.exe
   • %PROGRAM FILES%\zzToolBar\IP.dat
   • %PROGRAM FILES%\zzToolBar\SearchEngineConfig

– A file that is for temporary use and it might be deleted afterwards:
   • %TEMPDIR%\%four-digit random character string%.tmp\Processes.dll

– %PROGRAM FILES%\zzToolBar\ToolBand.dll Further investigation pointed out that this file is malware, too. Detected as: ADSPY/ZzToolbar.B

– %PROGRAM FILES%\zzToolBar\Toolbar_bho.dll Further investigation pointed out that this file is malware, too. Detected as: ADSPY/ZzToolbar.C

Registry The following registry keys are added:

– [HKLM\SOFTWARE\zzToolbar\%chinese text%]
   • Install_Dir="%PROGRAM FILES%\zzToolBar"
   • ToolBarVer="2.0.0.9"
   • TM="0"
   • AgentID="%several random numbers from 0 to 9%"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\
   BrowseNewProcess]
   • BrowseNewProcess="yes"

– [HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\
   %chinese text%]
   • DisplayName="%chinese text%"
   • UninstallString=""%PROGRAM FILES%\zzToolBar\Uninstall.exe""

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.

See a brief description here.

Description inserted by Thomas Wegele on Thu, 11 Sep 2008 10:15 (GMT+1)
Description updated by Thomas Wegele on Thu, 11 Sep 2008 15:42 (GMT+1)

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