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TrojanSpy:Win32/Brazloer.A

First posted on 12 February 2014.
Source: Microsoft

Aliases :

There are no other names known for TrojanSpy:Win32/Brazloer.A.

Explanation :

Threat behavior

Installation

TrojanSpy:Win32/Brazloer.A copies itself to c:\documents and settings\administrator\local settings\temp\wmsupdate.exe. The malware creates the following files on your PC:

• c:\documents and settings\administrator\local settings\temp\novinha.txt

Payload

Changes system security settings

TrojanSpy:Win32/Brazloer.A disables the Least Privileged User Account (LUA), also known as the ?administrator in Admin Approval Mode? user type. It does this by making the following registry modifications:

Sets value: "EnableLUA"
With data: "0"
In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

Note: Disabling the LUA allows all applications to run by default with all administrative privileges. You won't be asked for explicit consent. Contacts remote host

The malware might contact a remote host at smtps.uol.com.br using port 587. Commonly, malware does this to:

• Report a new infection to its author
• Receive configuration or other data
• Download and run files, including updates or other malware
• Receive instructions from a remote hacker
• Upload data taken from your PC

This malware description was produced and published using automated analysis of file SHA1 5096de7d59df7eb7fd817626c118040eb2d81981.Symptoms

System changes

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

• You have these files:
  
  c:\documents and settings\administrator\local settings\temp\novinha.txt
  c:\documents and settings\administrator\local settings\temp\wmsupdate.exe

• You see these entries or keys in your registry:
  
  Sets value: "EnableLUA"
  With data: "0"
  In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

Last update 12 February 2014

 

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