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PSW-Stealer.Avisa Analysis Report
Threat Submitted On: 3/9/2008 12:28:21 AM
Threat Analysed On: 3/9/2008 5:28:21 AM
Threat Updated On: 1/28/2011 2:27:39 PM
Type : PSW-Stealer
Symptoms of Avisa
  • Runs in stealth mode and records passwords as and when entered on a system
  • May also imitate the login prompt, asking the user to provide their password
Information
Alias : Trojan-PSW.Win32.Avisa
Md5 Hash : [17884451c67d7805b518bc04ad732522]
File Size : (69632 bytes)

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: avisar.dll
Path : %windir%

Md5Hash :a5ea0ad9260b1550a14cc58d2c39b03d ( 3 bytes)
File: rundii32.exe
Path : %windir%\system

Md5Hash :17884451c67d7805b518bc04ad732522 ( 69632 bytes)
File: [randomname].exe
Path : %workingdir%

Md5Hash :17884451c67d7805b518bc04ad732522 ( 69632 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 :
rundii32 = "%windir%\system\rundii32.exe"
Creates the following child process(s) on execution:

%programfiles%\internet explorer\iexplore.exe -nohome

services.exe

Creates the Following MUTEX(s) on user's System:-
raspbfile
shell.cmrupidllist
msratingmutex
ctf.lbes.mutexdefaults-1-5-21-1577510529-1487242207-3164383555-1010
ctf.compart.mutexdefaults-1-5-21-1577510529-1487242207-3164383555-1010
ctf.asm.mutexdefaults-1-5-21-1577510529-1487242207-3164383555-1010
ctf.layouts.mutexdefaults-1-5-21-1577510529-1487242207-3164383555-1010
ctf.tmd.mutexdefaults-1-5-21-1577510529-1487242207-3164383555-1010
_!shmsfthistory!_

NOTE:

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

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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