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[Metallica]

Content is republished with permission from Malwarebytes.

What is Avg Antivirus?

The Malwarebytes research team has determined that Avg Antivirus is a fake anti-malware application. They can put users at risk by giving them as false sense of security.
This particular one uses the name of existing security software.

How do I know if I am infected with Avg Antivirus?

You may see this entry in your list of installed Chrome extensions:



You may see these warnings during install:





How did Avg Antivirus get on my computer?

PUPs use different methods for spreading themselves. This particular one was downloaded from the webstore:



How do I remove Avg Antivirus?

Our program Malwarebytes can detect and remove this rogue.

• Please download Malwarebytes for Windows to your desktop.
• Double-click MBSetup.exe and follow the prompts to install the program.
• When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
• Click on the Get started button.
• Click Scan to start a Threat Scan.
• When the scan is finished click Quarantine to remove the found threats.
• Reboot the system if prompted to complete the removal process.

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

• No, Malwarebytes removes Avg Antivirus completely.

How would the full version of Malwarebytes 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 for additional protection.

As you can see below Malwarebytes Browser Guard, as well as the Premium version of Malwarebytes, would have protected you against the Avg Antivirus rogue. It would have warned you before the rogue could install itself, giving you a chance to stop it before it became too late.

Technical details for experts

Possible signs in FRST logs:

CHR Extension: (Click to start) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\obdbjfggeligjneffbfdalhochfimkgj [2021-05-14]

Alterations made by the installer:

File system details [View: All details] (Selection)
---------------------------------------------------
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\obdbjfggeligjneffbfdalhochfimkgj\0.26_0
       Adds the file background.js"="11/12/2016 3:51 PM, 407 bytes, A
       Adds the file GAME3.zip"="11/12/2016 4:52 PM, 12819 bytes, A
       Adds the file index.html"="11/10/2016 8:03 PM, 0 bytes, A
       Adds the file manifest.json"="5/14/2021 8:57 AM, 1105 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\obdbjfggeligjneffbfdalhochfimkgj\0.26_0\_metadata
       Adds the file computed_hashes.json"="5/14/2021 8:57 AM, 484 bytes, A
       Adds the file verified_contents.json"="11/12/2016 4:51 PM, 2176 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\obdbjfggeligjneffbfdalhochfimkgj\0.26_0\image
       Adds the file 128.png"="5/14/2021 8:57 AM, 7048 bytes, A
       Adds the file 16.png"="5/14/2021 8:57 AM, 704 bytes, A
       Adds the file 19.png"="5/14/2021 8:57 AM, 454 bytes, A
       Adds the file 38.png"="5/14/2021 8:57 AM, 1219 bytes, A
       Adds the file 48.png"="5/14/2021 8:57 AM, 1173 bytes, A

Registry details [View: All details] (Selection)
------------------------------------------------
    [HKEY_CURRENT_USER\Software\Google\Chrome\PreferenceMACs\Default\extensions.settings]
       "obdbjfggeligjneffbfdalhochfimkgj"="REG_SZ", "0B4411A544523439A9523AB4A40922687E9F7918FFFA8E72FF9580FAC9663D3A"

Malwarebytes log:

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 5/14/21
Scan Time: 9:05 AM
Log File: c746ce0e-b482-11eb-be2b-080027235d76.json

-Software Information-
Version: 4.3.0.98
Components Version: 1.0.1292
Update Package Version: 1.0.40364
License: Premium

-System Information-
OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: {username}-PC\{username}

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 234175
Threats Detected: 4
Threats Quarantined: 4
Time Elapsed: 2 min, 37 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Disabled
Heuristics: Enabled
PUP: Detect
PUM: Detect

-Scan Details-
Process: 0
(No malicious items detected)

Module: 0
(No malicious items detected)

Registry Key: 0
(No malicious items detected)

Registry Value: 1
PUP.Optional.FakeAVG, HKCU\SOFTWARE\GOOGLE\CHROME\PREFERENCEMACS\Default\extensions.settings|obdbjfggeligjneffbfdalhochfimkgj, Quarantined, 2147, 939614, , , , , , 

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 1
PUP.Optional.FakeAVG, C:\USERS\{username}\APPDATA\LOCAL\Google\Chrome\USER DATA\Default\EXTENSIONS\obdbjfggeligjneffbfdalhochfimkgj, Quarantined, 2147, 939614, 1.0.40364, , ame, , , 

File: 2
PUP.Optional.FakeAVG, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, 2147, 939614, , , , , 4192DE27C1929B7D28B5F537928B6BCE, D82BC581077908BF3C6169874C463BA87CF5F48F85DD2CC8B749EF57C56E6045
PUP.Optional.FakeAVG, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 2147, 939614, , , , , 09BE44D33513584CCEFCCC106D1BF308, 08289CD7E635236281611D5B6E0964A040671398E555A52533C0C2AD4329B5C5

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)


(end)

As mentioned before the full version of Malwarebytes 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.