DR/OneStep.A - Dropper

See also

Summary

Full description

Statistics

Virus:	DR/OneStep.A
Date discovered:	22/07/2007
Type:	Dropper
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Low
Static file:	No
File size:	300.000 Bytes
VDF version:	6.39.00.176 - Sun, 22 Jul 2007 19:37 (GMT+1) - Tue, 24 Jul 2007 12:13 (GMT+1)
IVDF version:	6.39.00.176 - Sun, 22 Jul 2007 19:37 (GMT+1) - Tue, 24 Jul 2007 12:13 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Symantec: Adware.WhenUSearchBar
   • Kaspersky: not-a-virus:AdWare.Win32.OneStep.c
   • Panda: Adware/SaveNow
   • Bitdefender: Adware.OneStep.A

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

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

Files It creates the following directory:
   • %PROGRAM FILES%\OneStepSearch\

The following files are created:

– Non malicious files:
   • %PROGRAM FILES%\OneStepSearch\uninstall.exe
   • %PROGRAM FILES%\OneStepSearch\readme.html
   • %PROGRAM FILES%\OneStepSearch\home.js

– Temporary files that might be deleted afterwards:
   • %TEMPDIR%\%four-digit random character string%.tmp\System.dll
   • %TEMPDIR%\%four-digit random character string%.tmp\logo.bmp
   • %TEMPDIR%\%four-digit random character string%.tmp\infoPage.ini
   • %TEMPDIR%\%four-digit random character string%.tmp\onestep.dll
   • %TEMPDIR%\%four-digit random character string%.tmp\onestep.exe
   • %TEMPDIR%\%four-digit random character string%.tmp\osopt.exe
   • %TEMPDIR%\%four-digit random character string%.tmp\readme.html
   • %TEMPDIR%\%four-digit random character string%.tmp\home.js
   • %TEMPDIR%\%four-digit random character string%.tmp\uninstall.exe

– %PROGRAM FILES%\OneStepSearch\osopt.exe Detected as: ADSPY/OneStep.C

– %PROGRAM FILES%\OneStepSearch\onestep.exe Detected as: ADSPY/OneStep.B

– %PROGRAM FILES%\OneStepSearch\onestep.dll Detected as: ADSPY/OneStep.A.1

Registry The following registry key is added:

– HKLM\Software\OneStepSearch\
• "TempInstallDir"="%PROGRAM FILES%\OneStepSearch"

See a brief description here.

Description inserted by Thomas Wegele on Mon, 25 Feb 2008 08:25 (GMT+1)
Description updated by Thomas Wegele on Mon, 25 Feb 2008 08:57 (GMT+1)

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