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TrojanDownloader:Win32/Banload.AYW

First posted on 13 November 2014.
Source: Microsoft

Aliases :

There are no other names known for TrojanDownloader:Win32/Banload.AYW.

Explanation :

Threat behavior TrojanDownloader:Win32/Banload.AYW is a member of Win32/Banload - a family of trojans that downloads other malware. Banload is usually used to download and install members of the Win32/Banker and Win32/Bancos families onto affected computers. Win32/Banker and Win32/Bancos are trojans that steal banking credentials and other sensitive data, and send it back to a remote attacker.

Installation

TrojanDownloader:Win32/Banload.AYW copies itself to c:\documents and settings\administrator\local settings\temp\internetexplorervps.exe. The malware creates the following files on your PC:

• c:\documents and settings\administrator\local settings\temp\consmts
• c:\documents and settings\administrator\local settings\temp\drestsilver.tl

Payload

Changes system security settings

TrojanDownloader:Win32/Banload.AYW 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.
This malware description was produced and published using automated analysis of file SHA1 dcef8ed0c556a64261ad4eb34add6ef6b339130f.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\consmts
c:\documents and settings\administrator\local settings\temp\drestsilver.tl
c:\documents and settings\administrator\local settings\temp\internetexplorervps.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 13 November 2014

 

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