PUA.Win32.Installcore.MANHOCFI

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.

It does not have any propagation routine.

It does not have any backdoor routine.

As of this writing, the said sites are inaccessible.

It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible.

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%\{Random}.log
• %User Temp%\ish{Random}\css\ie6_main.css
• %User Temp%\ish{Random}\css\main.css
• %User Temp%\ish{Random}\css\sdk-ui\browse.css
• %User Temp%\ish{Random}\css\sdk-ui\button.css
• %User Temp%\ish{Random}\css\sdk-ui\checkbox.css
• %User Temp%\ish{Random}\css\sdk-ui\images\button-bg.png
• %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg-corner.png
• %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg.png
• %User Temp%\ish{Random}\css\sdk-ui\images\progress-bg2.png
• %User Temp%\ish{Random}\css\sdk-ui\progress-bar.css
• %User Temp%\ish{Random}\csshover3.htc
• %User Temp%\ish{Random}\form.bmp.Mask
• %User Temp%\ish{Random}\images\bg.png
• %User Temp%\ish{Random}\images\clickVerify.png
• %User Temp%\ish{Random}\images\close.png
• %User Temp%\ish{Random}\images\close_hover.png
• %User Temp%\ish{Random}\images\Color_Button.png
• %User Temp%\ish{Random}\images\Color_Button_Hover.png
• %User Temp%\ish{Random}\images\default_tb.png
• %User Temp%\ish{Random}\images\default_wi.png
• %User Temp%\ish{Random}\images\Grey_Button.png
• %User Temp%\ish{Random}\images\Grey_Button_Hover.png
• %User Temp%\ish{Random}\images\icon_generic.png
• %User Temp%\ish{Random}\images\loader.gif
• %User Temp%\ish{Random}\images\Minimize.png
• %User Temp%\ish{Random}\images\Pause_Button.png
• %User Temp%\ish{Random}\images\progress-bg.png
• %User Temp%\ish{Random}\images\Progress.png
• %User Temp%\ish{Random}\images\ProgressBar.png
• %User Temp%\ish{Random}\images\Quick_Specs.png
• %User Temp%\ish{Random}\images\Resume_Button.png
• %User Temp%\ish{Random}\images\sponsored.png
• %User Temp%\ish{Random}\images\truste_logo.png
• %User Temp%\ish{Random}\locale\EN.locale
• %User Temp%\ish{Random}\locale\ES.locale
• %User Temp%\ish{Random}\bootstrap_{Random}.html
• %User Temp%\ish{Random}\bootstrap_{Random}.html
• %User Temp%\is{Random}\{Random}_stp.EXE
• %User Temp%\is{Random}\{Random}_stp.EXE.part

(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:

• "{Malware Path}\{Malware Filename}.exe" /_ShowProgress

It creates the following folders:

• %User Temp%\ish{Random}
• %User Temp%\ish{Random}\css
• %User Temp%\ish{Random}\css\sdk-ui
• %User Temp%\ish{Random}\css\sdk-ui\images
• %User Temp%\ish{Random}\images
• %User Temp%\ish{Random}\locale

(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).)

Propagation

This Potentially Unwanted Application does not have any propagation routine.

Backdoor Routine

This Potentially Unwanted Application does not have any backdoor routine.

Rootkit Capabilities

This Potentially Unwanted Application does not have rootkit capabilities.

Download Routine

This Potentially Unwanted Application connects to the following URL(s) to download its component file(s):

• http://{BLOCKED}odown.com/ic/dw/dropbox-2-6-20-es-en-br-fr-de-it-cn-jp-ru-pl-kr-win.exe

As of this writing, the said sites are inaccessible.

Other Details

This Potentially Unwanted Application connects to the following website to send and receive information:

• http://{BLOCKED}stc.com/icons/dropbox__.png
• http://{BLOCKED}odowncdn.com/UpToDown/?v=3.0&c={Random}
• http://{BLOCKED}downcdn.com/UpToDown/?v=3.0&c={Random}
• http://{BLOCKED}downcdn.com/?pcrc={Random}

It does the following:

• It opens the following website through a browser:
  • http://{BLOCKED}x.jp.uptodown.com/download?thank=you
  
  which will be redirected to:
  • http://{BLOCKED}x.jp.uptodown.com/download
  
• It requires to be executed as an administrator.
  
• It displays the following during installation:
  
  
  

However, as of this writing, the said sites are inaccessible.

It does not exploit any vulnerability.