MSH.Bluwimps

Printer Friendly Page

Discovered: February 06, 2018
Updated: February 08, 2018 5:41:09 PM
Infection Length: Varies
Systems Affected: Windows
CVE References: CVE-2017-0144

MSH.Bluwimps is a PowerShell script that steals information from the compromised computer. It may also download potentially malicious files.

Antivirus Protection Dates

  • Initial Rapid Release version February 06, 2018 revision 022
  • Latest Rapid Release version May 10, 2018 revision 009
  • Initial Daily Certified version February 07, 2018 revision 002
  • Latest Daily Certified version May 09, 2018 revision 025
  • Initial Weekly Certified release date February 07, 2018

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Fred Gutierrez

Discovered: February 06, 2018
Updated: February 08, 2018 5:41:09 PM
Infection Length: Varies
Systems Affected: Windows
CVE References: CVE-2017-0144

This fileless threat may spread to unpatched Windows computers via the Microsoft Windows SMB Server Remote Code Execution Vulnerability (CVE-2017-0144), also known as EternalBlue.

When the threat is executed, it creates the following file:

  • %Windir%\temp\y1.bat

The threat may then delete the following file:
  • %Windir%\temp\y1.bat

Next, the threat may create the following custom Windows Management Instrumentation (WMI) Management Class:
  • Win32_TaskService

The threat may create the following properties in the custom class:
  • mimi
  • mon
  • vcp
  • vcr
  • funs
  • sc
  • ipsuc
  • ip17

The threat uses the custom class to store different parts of itself:
  • encrypted Mimikatz binary
  • encrypted Monero coinminer binary
  • two encrypted Microsoft library files
  • encrypted EternalBlue exploit code
  • encrypted downloader binary

The threat uses WMI to collect network configuration.

The threat can search for processes connected to certain ports on the command and control (C&C) server.

The threat can end processes connected to other ports on the C&C.

The threat can leverage WMI to use PowerShell to scan the subnet range to see which computers are vulnerable to the EternalBlue exploit.

Next, the threat may connect to any of the following remote IP addresses:
  • 118.[REMOVED].48.95
  • 195.[REMOVED].127.157
  • 93.[REMOVED].93.73

The threat may then perform the following actions on the compromised computer:
  • Disable hibernation mode
  • Disable standby mode
  • Hide menu entry for "Balanced" power scheme
  • Disable power down when the lid is closed on laptops

The threat may steal the following information from the compromised computer:
  • Username
  • Computer name
  • User password

The threat may then download potentially malicious files from the following locations:
  • http://[REMOVED]:8000/info3.ps1
  • http://[REMOVED]:8000/info6.ps1

Writeup By: Fred Gutierrez

Discovered: February 06, 2018
Updated: February 08, 2018 5:41:09 PM
Infection Length: Varies
Systems Affected: Windows
CVE References: CVE-2017-0144

You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

Before proceeding further we recommend that you run a full system scan . If that does not resolve the problem you can try one of the options available below.



FOR NORTON USERS
If you are a Norton product user, we recommend you try the following resources to remove this risk.


Removal Tool


If you have an infected Windows system file, you may need to replace it using the Windows installation CD .


How to reduce the risk of infection
The following resources provide further information and best practices to help reduce the risk of infection.



FOR BUSINESS USERS
If you are a Symantec business product user, we recommend you try the following resources to remove this risk.


Identifying and submitting suspect files
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.


Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .


How to reduce the risk of infection
The following resource provides further information and best practices to help reduce the risk of infection.
Protecting your business network



MANUAL REMOVAL
The following instructions pertain to all current Symantec antivirus products.


1. Performing a full system scan
How to run a full system scan using your Symantec product


2. Restoring settings in the registry
Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.

Writeup By: Fred Gutierrez