PUA.Win32.BoxMini.A

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Potentially Unwanted Application drops the following files:

• %User Temp%\RarSFX0\bass.dll
• %User Temp%\RarSFX0\bass_aac.dll
• %User Temp%\RarSFX0\BoxMini.exe
• %User Temp%\RarSFX0\skin.zip
• %User Temp%\RarSFX0\start.bat
• %User Temp%\RarSFX0\update.dll

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

• %System%\cmd.exe /c "%User Temp%\RarSFX0\start.bat"
• %User Temp%\RarSFX0\{filename}

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It creates the following folders:

• %User Temp%\RarSFX0

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Potentially Unwanted Application adds the following registry keys as part of its installation routine:

HKLM\SYSTEM\ControlSet001\
Control\MediaResources\MediaResources\
DirectSound
Speaker Configuration = 4

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

• http://box2.{BLOCKED}u.com/client/BoxMiniUpdate.xml
• http://api2015.{BLOCKED}u.com/soft/testApi.php
• http://api.{BLOCKED}anlaoge.com/box/gd
• http://adtest.{BLOCKED}ital.com/rt?type=2

It does the following:

• Downloads mp3 files and plays them
  • Connects to http://www.{BLOCKED}u.com/html/pxml/1/{mp3name}.xml to retrieve mp3 details
  • Connects to http://{BLOCKED}.{BLOCKED}.181.35/hot/2004/07-13/{mp3name}.mp3 to download the mp3
  • Connects to http://aliyunimg.{BLOCKED}u.com to retrive the image for the mp3
  • The mp3 files are saved at %User Profile%\My Music