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Trojan:Win32/Kilim.D

First posted on 03 January 2014.
Source: Microsoft

Aliases :

There are no other names known for Trojan:Win32/Kilim.D.

Explanation :

Threat behavior Trojan:Win32/Kilim.D is a malicious program that is unable to spread of its own accord. It may perform a number of actions of an attacker's choice on an affected computer.

Installation

When it runs, Trojan:Win32/Kilim.D copies itself to c:\documents and settings\administrator\application data\install_flashsetup.exe. The malware modifies the following registry entry so that it runs each time you start your PC:

Adds value: "adobeflash"
With data: "c:\documents and settings\administrator\application data\install_flashsetup.exe"
To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run The malware creates the following files on your computer:

• c:\documents and settings\administrator\local settings\application data\google\chrome\user data\default\preferences
• c:\documents and settings\administrator\local settings\temp\chromepref.txt
• c:\documents and settings\administrator\local settings\temp\operapref.txt
• c:\documents and settings\administrator\local settings\temp\pref.txt
• c:\documents and settings\administrator\local settings\temp\yandexpref.txt

Payload

Modifies system security settings
Trojan:Win32/Kilim.D disables the LUA (Least Privileged User Account), also known as the €œadministrator in Admin Approval Mode€ user type, by making the following registry modification:

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

Note: Disabling the LUA allows all applications to run by default with all administrative privileges, without the user being prompted for explicit consent.
This malware description was produced and published using our automated analysis system's examination of file SHA1 d041361f0a7a058b6e06de57280b784d8a2abdaa.Symptoms

System changes

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

• The presence of the following files:
  
  

c:\documents and settings\administrator\application data\install_flashsetup.exe
c:\documents and settings\administrator\local settings\application data\google\chrome\user data\default\preferences
c:\documents and settings\administrator\local settings\temp\chromepref.txt
c:\documents and settings\administrator\local settings\temp\operapref.txt
c:\documents and settings\administrator\local settings\temp\pref.txt
c:\documents and settings\administrator\local settings\temp\yandexpref.txt

• You see these entries or keys in your registry:

Adds value: "adobeflash"
With data: "c:\documents and settings\administrator\application data\install_flashsetup.exe"
To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run Adds value: "EnableLUA"
With data: "0"
To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

Last update 03 January 2014

 

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