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PWS:MSIL/Stimilina.M


First posted on 12 November 2015.
Source: Microsoft

Aliases :

There are no other names known for PWS:MSIL/Stimilina.M.

Explanation :

Threat behavior

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

  • %APPDATA%\microsoft\hkrun.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: "RegEdit1"
With data: "%APPDATA%\microsoft\hkrun.exe"
In subkey: HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{SL5JY177-PJ3Y-E8CD-646H-S0V6OY4OJKL6}
Sets value: "StubPath"
With data: ""%APPDATA%\microsoft\hkrun.exe""


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



Payload


Steals your sensitive information

This threat can steal your sensitive information, such as your user names and passwords for:

  • Email or social media websites
  • Banking websites
  • Online games


Connects to a remote host

We have seen this threat connect to a remote host. 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

Creates a mutex

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

  • IPumgObt


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 d2a12afd2d632278b113509e895251dd4c486545.

Symptoms

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

  • You see a file similar to:
    • %APPDATA%\microsoft\hkrun.exe
  • You see registry modifications such as:
    • In subkey: HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
      Sets value: "RegEdit1"
      With data: "%APPDATA%\microsoft\hkrun.exe"

    • In subkey: HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{SL5JY177-PJ3Y-E8CD-646H-S0V6OY4OJKL6}
      Sets value: "StubPath"
      With data: ""%APPDATA%\microsoft\hkrun.exe""

  • You see the following mutex:
    • IPumgObt

Last update 12 November 2015

 

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