not-a-virus:AdWare.Win32.WhiteSmoke.a

Technical Details

This program downloads various malware from the Internet and installs it without the user's knowledge. It is a Windows application (PE EXE file). It is 129 288 bytes in size. It is packed using UPX. The unpacked file is approximately 404 KB in size. It is written in C++.

Payload

Once launched, the Trojan checks for current user's administrator privileges and if they are missing, displays the following message:

It performs the following actions:

• When launched, it displays the following window:

  

• When the program runs, it creates the following unique identifiers:

  {FF4E366C-EB6E-4387-968D-B97175E24D5A}
  Global\WST2010_Feature_<rnd>
  Global\WST2010_{58343C24-CB4B-4a57-9B4D-E3DD88463B62}_INITIALIZE
  

  where <rnd> is a random sequence of numbers.
• It creates the following system registry keys:

  [HKCU\Environment]
  "WS_TARGET_DIR"="%Program Files%\\WhiteSmoke Translator"
  
  [HKLM\Software\WhiteSmokeTranslator]
  "InstallOption"=dword:0000000e
  "DistID"=dword:0000138a
  

• In the current user's temporary directory it creates the following directory:

  %Temp%\~nsu.tmp\

  Where the program places the following files:

  %Temp%\~nsu.tmp\wsget.exe

  The file is 61 952 bytes in size.

  MD5: CB40B57461F84E92BA68DD6A77B0675D
  SHA1: FF5C21B8753BF9BA3402059CD98AC3A32F19E82F

  %Temp%\~nsu.tmp\boost.ico

  The file is 13 942 bytes in size.

  MD5: 576AE10DD9F5521A3285163D31EBD277
  SHA1: 4D88D461ED307F6949FE51F4698C35767FEF8D84

  The Trojan also creates the following files (where <user> is the name of the current user account):

  %Documents and Settings%\All Users\Start Menu\Programs\Startup\WhiteSmoke Translator.lnk
  %Documents and Settings%\<user>\Desktop\WhiteSmoke (continue installation).lnk
  
  %Documents and Settings%\<user>\Desktop\Improve Your PC.lnk

  The file is 1102 bytes in size.

  MD5: 1A2F8DD3F951A4BDBA6E8F7683675E46
  SHA1: 3D1ACB0DF365B2A422FEE42890A92A30CB7978FD

  When this file is launched, the following links open in the default browser:

  http://www.re***ster.com/L10n/geo-ws-597-di.php

  At the time of writing, this link was inactive.
• It launches the following file for execution:

  %Temp%\~nsu.tmp\wsget.exe

  It sends the following string to this file as a parameter:

  "%Program Files%\WhiteSmoke Translator"

  The launched file downloads and launches files from the following URL addresses:

  http://get.w***moke.com/TranslatorTools/whitesmoke-silent.exe

  The file is 251 200 bytes in size.

  MD5: B2C1ECBB4E673505E9248A25DFC286B0
  SHA1: DD472F78C5E8591AD7C57435C67B46CFABAFAFCF

  http://get.w***moke.com/TranslatorTools/WhiteSmokeTranslator_rev1.exe

  The file is 5 076 816 bytes in size.

  MD5: 12C6D991CAE48AEE5A14F1175D2543DA
  SHA1: 57859915C688EF98718C57500116DE2483ADEFCF

  The files are saved under the following names, respectively:

  %Temp%\~nsu.tmp\whitesmoke-silent.exe
  %Temp%\~nsu.tmp\WhiteSmokeTranslator_rev1.exe

Removal instructions

If your computer does not have antivirus protection and has been infected by this malicious program, follow the instructions below to delete it:

1. Delete the original Trojan file (its location will depend on how the program originally penetrated the infected computer).
2. Delete the following files:

   %Temp%\~nsu.tmp\wsget.exe
   %Temp%\~nsu.tmp\boost.ico
   %Documents and Settings%\All Users\Start Menu\Programs\Startup\WhiteSmoke Translator.lnk
   %Documents and Settings%\<user>\Desktop\WhiteSmoke (continue installation).lnk
   %Documents and Settings%\<user>\Desktop\Improve Your PC.lnk
   %Temp%\~nsu.tmp\whitesmoke-silent.exe
   %Temp%\~nsu.tmp\WhiteSmokeTranslator_rev1.exe
   

3. Delete the following system registry keys:

   [HKCU\Environment]
   "WS_TARGET_DIR"="%Program Files%\\WhiteSmoke Translator"
   
   [HKLM\Software\WhiteSmokeTranslator]
   "InstallOption"=dword:0000000e
   "DistID"=dword:0000138a
   

4. Perform a full scan of the computer using Kaspersky Anti-Virus with up-to-date antivirus databases (download a trial version).

MD5: 3115E3A19CFFBB92F01EEB4EEC67693C
SHA1: 0B593692AE3C72E60A1CF61404F342505BF5BB83