Migmaf

Classification

Malware

Virus

W32

Migmaf

Summary

The TrojanProxy.Win32.Migmaf is designed to act as a proxy and hide the real address of its creator. This is targeted, most likely to perform doubtfully legal activities while remaining hidden.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

This trojan does not include any kind of propagation mechanism so, its arrival into a machine as to be caused by accompanying components or by manually breaking into the system.

It performs a check on the Windows version, it will only run in Windows 98/ME and newer versions like Windows NT, Windows 2000, Windows XP, or Windows Server 2003 family, exiting if it finds any other version (Windows 95).

It creates a mutex in the system with name "REQUEST_MANAGE_SUBSYSTEM" so it will only be one instance of it running at a given time.

next, it will perform a check for the keyboard layout from the registry value:

[HKEY_CURRENT_USER\Keyboard Layout\Preload]
 

It will check up to three values set in this registry entry and, if any of them matches the code of the Russian keyboard layout it will exit.

next, this malware will add an entry in:

 [HKEY_CURRENT_USER\Software\Microsoft\Windows\Currentversion\Run]
 "Login Service" = %path_to_file%

 

%path_to_file% signifies the path to the current running instance of this malware.

After this initial steps, it will perform a speed test against www.microsoft.com. This tests will include the text

"disclaimer: www.microsoft.com used for bandwidth speed testing only"
 

Once finished with this tests it will contact to a hard-coded master server, of which it will attempt to hide its address by not always correctly connecting to it (it will try fake addresses).

Hosts connecting to the infected computer will be relayed to the master which will remain hidden from the connecting hosts.

Blocking ports 80 and 81 on the users' machine will prevent it from being used by this malware. This can be accomplished with Firewall software.