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Trojan:Win32/Qhost.IG

First posted on 20 October 2014.
Source: Microsoft

Aliases :

There are no other names known for Trojan:Win32/Qhost.IG.

Explanation :

Threat behavior

Installation

Trojan:Win32/Qhost.IG creates the following files on your PC:

• c:\documents and settings\administrator\application data\chromium.exe
• c:\documents and settings\administrator\local settings\temp\rarsfx0\youtube player.exe

Payload

Changes Hosts file

Trojan:Win32/Qhost.IG changes the Windows Hosts file. Malware sometimes does this to redirect URLs to different IP addresses, often to stop you from accessing security-related websites. Changes system security settings

The malware 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 www.molotofcu.com using port 80. 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 0420b49a8dc65ba352d47f357fb8399285ed7012.Symptoms

System changes

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

• You have these files:
  
  c:\documents and settings\administrator\application data\chromium.exe
  c:\documents and settings\administrator\local settings\temp\rarsfx0\youtube player.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 20 October 2014

 

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