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TrojanDownloader:Win32/Mytonel.B

First posted on 07 July 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanDownloader:Win32/Mytonel.B.

Explanation :

Threat behavior

Installation


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

In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Run Sets value: ""
With data: ""

For example,
In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Sets value: example
With data: c:\path\example.exe

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



Payload


Downloads malware or unwanted software

This threat can download other malware and unwanted software onto your PC.



This threat tries to stop some services from running on your PC, including:

• sharedaccess

Additional information

Creates a mutex

This threat can create one or more mutexes on your PC. For example:

• !appdata!local!microsoft!windows!history!history.ie5!
• !appdata!local!microsoft!windows!temporary internet files!content.ie5!
• !appdata!roaming!microsoft!windows!cookies!

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 1b1ae251b63815e4a0bd0961031e34377b59ba12.

Symptoms

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

• You see registry modifications such as:
  
  • In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Run
    Sets value: ""
    With data: ""
    
    

• You see the following mutex:
  • !appdata!local!microsoft!windows!history!history.ie5!
  • !appdata!local!microsoft!windows!temporary internet files!content.ie5!
  • !appdata!roaming!microsoft!windows!cookies!

Last update 07 July 2015

 

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