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Trojan-Backdoor.Nao Analysis Report
Threat Submitted On: 2/8/2008 5:23:01 PM
Threat Analysed On: 2/8/2008 10:23:01 PM
Threat Updated On: 1/27/2011 5:03:16 PM
Type : Trojan-Backdoor
Symptoms of Nao
  • Performs malicious activities.
  • Fetches the user’s sensitive information.
  • Enables the attacker to control the system remotely.
Information
Alias : Backdoor.Win32.Nao
Md5 Hash : [6135b120f7dae38c72c336da20cc9678]
File Size : [Not Available]

Technical Details

Here are the Technical findings of our analysis team after analyzing this malware in detail :-

Creates the following infected Files on user's System
Note:
Delete the following Files to remove Infection
File: 40c414c6.exe
Path : %workingdir%

Md5Hash :6135b120f7dae38c72c336da20cc9678 ( 77824 bytes)
File: cfgwiz16.exe
Path : %windir%\system32

Md5Hash :6135b120f7dae38c72c336da20cc9678 ( 77824 bytes)
File: [randomname].exe
Path : %workingdir%

Md5Hash :6135b120f7dae38c72c336da20cc9678 ( bytes)
Also creates the following files on user's System which are also created by Genuine Software :-
Note:
These file(s) can be kept as they are also created by genuine Software.
File : msvbvm60.dll
Path : %windir%\system32

Md5Hash :e949eee7d1be07e32267fe10d9992c38 ( 1392671 bytes)
The following Registry Values are added to the provided Registry Keys :-
Note:
Delete the added Values from the Key to remove Infection
|__ Value Added :
cfgwiz16 = "%windir%\system32\cfgwiz16.exe"
|__ Value Added :
CFGWIZ16 = "%WINDIR%\SYSTEM32\CFGWIZ16.EXE"
Creates the following child process(s) on execution:

%windir%\system32\cfgwiz16.exe %workingdir%\[random name].exe

Copies the Following Files to Given Location :-

Copies :%workingdir%\[random name].exe

To : %windir%\system32\cfgwiz16.exe

Copies :%workingdir%\mswinsck.ocx

To : %windir%\system32\mswinsck.ocx

Copies :%workingdir%\msvbvm60.dll

To : %windir%\system32\msvbvm60.dll

NOTE:

1. %workingdir% Refers to the current directory in which user is working.
2. %windir% Refers to the windows root folder. By default it is 'C:\Windows'

Important: We strongly recommend that you backup the Registry before making any changes to it. Incorrect changes to the Registry can result in permanent data loss or corrupted Files. Modify the malicious\suspicious Subkeys only.

Click Here for more spywarelib.com recommended PC Security and Optimization Tools

To modify registry entries in Windows Operating System:
Follow Steps:
1. Click Start > Run
2. Type “regedit” : to open registry editor
3. Navigate to required registry Key from the Left Tree control and modify accordingly.


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