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TrojanProxy:Win32/Bunitu.N

First posted on 18 November 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanProxy:Win32/Bunitu.N.

Explanation :

Threat behavior

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

• %LOCALAPPDATA%\smgr64.dll

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: "smgr64"
With data: "rundll32.exe "%LOCALAPPDATA%\smgr64.dll",smgr64"


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



Payload


Connects to a remote host

We have seen this threat connect to a remote host, including:

• sns.dmlticket.com using port 53

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

Bypasses firewall

This threat can modify, bypass, or disable your firewall. It can do this by changing your firewall allowed list, or by adding a new rule so that it, or other applications, aren't detected.

You might need to restore your Windows Firewall settings.



Additional information

Creates a mutex

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

• 3G1S91V5ZA5fB56W

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 0e82f4cb6b86ac90c1aa756aff8d27ae4354240c.

Symptoms

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

• You see a file similar to:
• %LOCALAPPDATA%\smgr64.dl
  
  
• You see registry modifications such as:
  
  • In subkey: HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    Sets value: "smgr64"
    With data: "rundll32.exe "%LOCALAPPDATA%\smgr64.dll",smgr64"
    
    
• You see the following mutex:
  • 3G1S91V5ZA5fB56W

Last update 18 November 2015

 

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