Backdoor.Mokes

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Discovered: January 31, 2016
Updated: September 13, 2016 12:01:26 AM
Type: Trojan
Infection Length: Varies
Systems Affected: Mac, Windows

Backdoor.Mokes is a Trojan horse that opens a back door and steals information from the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version January 31, 2016 revision 037
  • Latest Rapid Release version September 21, 2017 revision 018
  • Initial Daily Certified version January 31, 2016 revision 049
  • Latest Daily Certified version September 21, 2017 revision 020
  • Initial Weekly Certified release date February 03, 2016

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

Writeup By: Paul Mangan

Discovered: January 31, 2016
Updated: September 13, 2016 12:01:26 AM
Type: Trojan
Infection Length: Varies
Systems Affected: Mac, Windows

This Trojan is manually installed.

Windows
When the Trojan is executed, it creates one of the following files:

  • %AppData%\Skype\SkypeHelper.exe
  • %AppData%\Dropbox\bin\DropboxHelper.exe
  • %AppData%\Google\Chrome\nacl32.exe
  • %AppData%\Google\Chrome\nacl64.exe
  • %AppData%\Mozilla\Firefox\mozillacache.exe
  • %AppData%\Adobe\Acrobat\AcroBroker.exe
  • %AppData%\Hewlett-Packard\hpqcore.exe
  • %AppData%\Hewlett-Packard\hpprint.exe
  • %AppData%\Hewlett-Packard\hpscan.exe
  • [PATH TO MALWARE]\version

The Trojan then creates the following registry entry so that it runs every time Windows starts:
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"[EXECUTABLE STEM]" = "[PATH TO MALWARE]"

OS X
When the Trojan is executed, it copies itself to the following location:

  • ~/Library/App Store/storeuserd

The Trojan creates the following files:

  • ~/Library/LaunchAgents/storeuserd.plist



      Windows and OS X
      Next, the Trojan opens a back door on the compromised computer and connects to the following remote locations:
      • 149.202.69.6
      • jessiman901.com
      • 158.69.241.141

      The Trojan may then perform the following actions:
      • Take screenshots and webcam photographs
      • Log user activity
      • Upload the recorded data and activity to the attackers' remote locations

      Recommendations

      Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

      • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
      • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
      • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
      • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
      • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
      • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
      • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
      • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
      • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
      • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
      • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
      • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
      • For further information on the terms used in this document, please refer to the Security Response glossary.

      Writeup By: Paul Mangan

      Discovered: January 31, 2016
      Updated: September 13, 2016 12:01:26 AM
      Type: Trojan
      Infection Length: Varies
      Systems Affected: Mac, Windows

      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: Paul Mangan