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What is AVASoft Antivirus Professional?

The Malwarebytes research team has determined that AVASoft Antivirus Professional is a fake anti-malware application. These so-called "rogues" use intentional false positives to convince users that their systems have been compromised. Then they try to sell you their software, claiming it will remove these threats. In extreme cases the false threats are actually the very trojans that advertise or even directly install the rogue. You are strongly advised to follow our removal instructions below.

How do I know if I am infected with AVASoft Antivirus Professional?

This is how the main screen of the rogue application looks:

main.png

You will find these icons in your taskbar and on your desktop:

icons.png

And see these warnings:

warning1.png

warning2.png

warning3.png

warning4.png

How did AVASoft Antivirus Professional get on my computer?

Rogue programs use different methods for spreading themselves. This particular one was distributed on infected sites.

How do I remove AVASoft Antivirus Professional?

Our program Malwarebytes Anti-Malware can detect and remove this rogue application, but because this rogue blocks the normal use of programs we will use Chameleon to remove it.

  • If Malwarebytes Anti-Malware is not installed on the infected computer.
    In order for this to work, you could need a second PC which is not infected and a USB flash drive or blank CD and CD burner or some other means to transfer files from one computer to the other.
    1. Download Chameleon from the Malwarebytes site.
    2. Unzip the contents of the zip-file to a folder in a convenient location on the infected computer.
    3. If you were unable to do this directly on the infected PC, then copy the folder from the clean computer to the infected one.
    4. Reboot the computer into safe mode with networking.
    5. Make certain that your infected PC is connected to the internet and then open the folder you created or copied, on your infected computer and double-click on svchost.exe.
    6. Follow the onscreen instructions to press a key to continue and Chameleon will proceed to download and install Malwarebytes Anti-Malware for you.
    7. Once it has done this, it will attempt to update Malwarebytes Anti-Malware, click OK when it says that the database was updated successfully
    8. Next, Malwarebytes Anti-Malware will automatically open and perform a Quick scan
    9. Upon completion of the scan, if anything has been detected, click on Show Results
    10. Have Malwarebytes Anti-Malware remove any threats that are detected and click Yes if prompted to reboot your computer to allow the removal process to complete
    11. After your computer restarts, open Malwarebytes Anti-Malware and perform one last Quick scan to verify that there are no remaining threats

  • If Malwarebytes Anti-Malware is already installed on the infected computer.
    In order for this to work, you must already have Malwarebytes Anti-Malware version 1.60 or later already installed on your infected PC.
    1. Reboot the computer into safe mode with networking.
    2. Open the program folder for Malwarebytes Anti-Malware (normally C:\Program Files\Malwarebytes' Anti-Malware or C:\Program Files (x86)\Malwarebytes' Anti-Malware)
    3. Once there, open the Chameleon folder
    4. Next, double-click on svchost.exe. This should result in a black DOS/command prompt window opening up.
    5. Press any key to continue as it says in the window
    6. Malwarebytes Chameleon will proceed to update Malwarebytes Anti-Malware, so ensure that you are connected to the internet if possible
    7. Once the update completes and it says your database is updated, click on OK
    8. Malwarebytes Chameleon will then terminate any threats running in memory, which may take a while, so please be patient
    9. Upon completion, Malwarebytes Anti-Malware will open automatically and perform a Quick scan
    10. Once the scan is complete, click on Show Results and remove any threats that are found by clicking Remove Selected
    11. If prompted to restart your computer to complete the removal process, click Yes
    12. After your computer restarts, open Malwarebytes Anti-Malware and perform one last Quick scan to verify that there are no remaining threats

Below is what you can expect to see in the Command prompt after succesfully using Chameleon.

chameleon16211000.png

You can find video-instructions for the removal of this rogue on our YouTube channel:

Is there anything else I need to do to get rid of AVASoft Antivirus Professional?

  • No, Malwarebytes' Anti-Malware removes AVASoft Antivirus Professional completely.

How would the full version of Malwarebytes Anti-Malware help protect me?

We hope our application has helped you eradicate this malicious software. If your current security solution let this infection through, you might please consider purchasing the FULL version of Malwarebytes Anti-Malware for additional protection.

As you can see below the full version of Malwarebytes Anti-Malware would have protected you against the AVASoft Antivirus Professional rogue. It would have warned you before the rogue could install itself, giving you a chance to stop it before it became too late.

protection1.png

Technical details for experts

Signs in a HijackThis log:

C:\ProgramData\A4C92EE85D95D9640000A4C88A25DF70\A4C92EE85D95D9640000A4C88A25DF70.exe

O4 - HKCU\..\RunOnce: [A4C92EE85D95D9640000A4C88A25DF70] C:\ProgramData\A4C92EE85D95D9640000A4C88A25DF70\A4C92EE85D95D9640000A4C88A25DF70.exe

Note: the folder- and file-name are random

Alterations made by the installer:




File system details [View: All details] (All)
---------------------------------------------
Adds the folder C:\ProgramData\A4C92EE85D95D9640000A4C88A25DF70
Adds the file A4C92EE85D95D9640000A4C88A25DF70"="10-4-2013 7:47, 6048 bytes, A
Adds the file A4C92EE85D95D9640000A4C88A25DF70.ico"="10-4-2013 7:42, 4286 bytes, A
Adds the file A4C92EE85D95D9640000A4C88A25DF70.exe"="19-3-2013 19:55, 407552 bytes, A
Adds the folder C:\Users\{username}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\AVASoft Professional Antivirus
Adds the file AVASoft Professional Antivirus.lnk"="10-4-2013 7:47, 2102 bytes, A
In the existing folder C:\Users\{username}\Desktop
Adds the file AVASoft Professional Antivirus.lnk"="10-4-2013 7:47, 2066 bytes, A
(-)(FILE) C2096ADF4B5442D60000C208A8DA467A.exe"="19-3-2013 19:55, 407552 bytes, A


Registry details [View: All details] (All)
------------------------------------------
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce]
"A4C92EE85D95D9640000A4C88A25DF70"="C:\ProgramData\A4C92EE85D95D9640000A4C88A25DF70\A4C92EE85D95D9640000A4C88A25DF70.exe"

Malwarebytes Anti-Malware log:

Malwarebytes Anti-Malware 1.70.0.1100
www.malwarebytes.org

Database version: v2013.04.08.07

Windows 7 Service Pack 1 x86 NTFS (Safe Mode/Networking)
Internet Explorer 8.0.7601.17514
Malwarebytes :: MBAMPC [administrator]

4/8/2013 8:55:40 PM
mbam-log-2013-04-08 (20-55-40).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 183387
Time elapsed: 2 minute(s), 2 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 1
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce|D8DA599B37BBABF70000D8D980C8B2F3 (Malware.Packer.SGX4)
-> Data: C:\ProgramData\D8DA599B37BBABF70000D8D980C8B2F3\D8DA599B37BBABF70000D8D980C8B2F3.exe -> Quarantined and deleted successfully.

Folders Detected: 1
C:\Users\Malwarebytes\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\AVASoft Professional Antivirus (Rogue.AVASoftPAV) -> Quarantined and deleted successfully.

Files Detected: 4
C:\ProgramData\D8DA599B37BBABF70000D8D980C8B2F3\D8DA599B37BBABF70000D8D980C8B2F3.exe (Malware.Packer.SGX4) -> Quarantined and deleted successfully.
C:\Users\Malwarebytes\Desktop\C2096ADF4B5442D60000C208A8DA467A.exe (Malware.Packer.SGX4) -> Quarantined and deleted successfully.
C:\Users\Malwarebytes\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\AVASoft Professional Antivirus\AVASoft Professional Antivirus.lnk (Rogue.AVASoftPAV) -> Quarantined and deleted successfully.
C:\Users\Malwarebytes\Desktop\AVASoft Professional Antivirus.lnk (Rogue.AVASoftPAV) -> Quarantined and deleted successfully.

(end)

As mentioned before the full version of Malwarebytes Anti-Malware could have protected your computer against this threat.

We use different ways of protecting your computer(s):

  • Dynamically Blocks Malware Sites & Servers
  • Malware Execution Prevention

Save yourself the hassle and get protected.

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