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PWS:Win32/Blankit.A

First posted on 02 December 2014.
Source: Microsoft

Aliases :

There are no other names known for PWS:Win32/Blankit.A.

Explanation :

Threat behavior

Installation
This threat can create files on your PC, including:

• %USERPROFILE%\desktop\dcscmin\imdcsc.exe

It modifies the registry so that it runs each time you start your PC. For example:

In subkey: HKCU\software\microsoft\windows\currentversion\run

Sets value: "Trillium Web Service"
With data: "%USERPROFILE%\desktop\dcscmin\imdcsc.exe"

In subkey: HKLM\software\microsoft\windows nt\currentversion\winlogon

Sets value: "UserInit"
With data: "\userinit.exe,%USERPROFILE%\desktop\dcscmin\imdcsc.exe"



The malware uses code injection to make it harder to detect and remove. It can inject code into running processes.



Payload


Connects to a remote host

We have seen this threat connect to a remote host, including:

• juckieai.ddns.net using port 4431

Malware can connect to a remote host to do any of the following:

• Check for an Internet connection.
• Download and run files (including updates or other malware).
• Report a new infection to its author.
• Receive configuration or other data.
• Receive instructions from a malicious hacker.
• Search for your PC location.
• Upload information taken from your PC.
• Validate a digital certificate.

Additional information

This threat can create a mutex on your PC. For example:

• DCMIN_MUTEX-SC005RA

It might use this mutex as an infection marker to prevent more than one copy of the threat running on your PC.

This malware description was published using automated analysis of file SHA1 04f0033592b4d99d59c216f6018257b84cc2652a. Symptoms

The following can indicate that you have this threat on your PC:

• You see these files:
• %USERPROFILE%\desktop\dcscmin\imdcsc.exe

• You see registry modifications such as:
  
  • In subkey: HKCU\software\microsoft\windows\currentversion\run
    Sets value: "Trillium Web Service"
    With data: "%USERPROFILE%\desktop\dcscmin\imdcsc.exe"
    
    
  • In subkey: HKLM\software\microsoft\windows nt\currentversion\winlogon
    Sets value: "UserInit"
    With data: "\userinit.exe,%USERPROFILE%\desktop\dcscmin\imdcsc.exe"
    
    

• You see a mutex such as:
• DCMIN_MUTEX-SC005RA

Last update 02 December 2014

 

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