False Positive or Exploit?

[Combiner]

Today when I started Firefox Developer Edition, it closed and MB popped up with this in the logs:

 

Malwarebytes
www.malwarebytes.com

-Log Details-
Protection Event Date: 11/7/17
Protection Event Time: 6:37 PM
Log File: d2602d10-c42d-11e7-b8cf-4ccc6a4da6f0.json
Administrator: Yes

-Software Information-
Version: 3.2.2.2018
Components Version: 1.0.212
Update Package Version: 1.0.3202
License: Premium

-System Information-
OS: Windows 10 (Build 14393.1593)
CPU: x64
File System: NTFS
User: System

-Exploit Details-
File: 0
(No malicious items detected)

Exploit: 1
Malware.Exploit.Agent.Generic, , Blocked, [0], [392684],0.0.0

-Exploit Data-
Affected Application: Mozilla Firefox (and add-ons)

File Name: 
URL: 

(end)

 

 

Is this a false positive? Or should I be worried?

[nikhils]

Moving it to the False positive section for further analysis.

[Arthi]

Hi Combiner,

Thanks for reporting. Can you please get some logs, so we can help you out. Please follow the below instructions.

1. Exploit logs:
Please download the files from this link:
https://malwarebytes.app.box.com/s/kzoo8u6jq7n82e0uji909y7pnuozx77z

Press the Windows + R keys, type "services.msc" and hit Enter.

Find the service named "Malwarebytes service" and use the right click menu to stop the service.

Extract the contents of the ZIP to a sub-folder in your Desktop.
Copy the files mbae.dll and mbae64.dll and paste them to the C:\Program Files\Malwarebytes\Anti-Malware\ folder.
Copy the files mbae.sys and mbae64.sys and paste them to the C:\Windows\System32\drivers\ folder.

After you replace the files, start the "Malwarebytes service" service again or reboot the computer. 

Reproduce the problem and collect and send back to us these two files:
C:\ProgramData\Malwarebytes\MBAMService\logs\mbae-default.log
C:\ProgramData\Malwarebytes\MBAMService\logs\MBAMSERVICE.log

The directory is hidden by default so you might have to click on "View -> Hidden items" in Explorer to see it.   
There is also a post here from Microsoft on how to do this for the more recent OS: https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files

2. FRST

Please download FRST from the link below and save it to your desktop:
    
http://www.bleepingcomputer.com/download/farbar-recovery-scan-tool/

    
Double-click the purple FRST icon to run the program. Click Yes when the disclaimer appears.
Click the Scan button. When the scan has finished, it will make 2 log files in the same directory the tool is run, FRST.txt and Addition.txt. Please attach both files to your reply.

I know this is a lot to do at once, so if you have any questions about the process, please let me know!

Thanks.