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False Positive? Calibre E-Book Management


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Been using the well-known Calibre E-Book software, along with MBAM, for years. Today, MBAM picked it up as ransomware - has it been infected, or it this a false positive?


-Log Details-
Protection Event Date: 8/26/18
Protection Event Time: 12:29 PM
Log File: 21e67fe2-a94d-11e8-9182-bc83850463af.json
Administrator: Yes

-Software Information-
Components Version: 1.0.391
Update Package Version: 1.0.6513
License: Premium

-System Information-
OS: Windows 10 (Build 17134.228)
CPU: x64
File System: NTFS
User: System

-Ransomware Details-
File: 1
Malware.Ransom.Agent.Generic, C:\Program Files\Calibre2\calibre.exe, No Action By User, [0], [392685],0.0.0


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We would need the sample in order to verify if this one is infected or not.

Can you zip and attach C:\Program Files\Calibre2\calibre.exe to your next post please?


Edited to add - I also suggest you update to the latest component updates, as that fixes a lot already.

To do so, please go to settings > Application and enable: "Notify me when full version updates are available" + Click the "Install Application Updates" in order to get latest.



2018-08-26 20_38_09-Malwarebytes Premium 3.5.1.png

Edited by miekiemoes
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I see this was a false positive indeed and has been fixed since last friday already. It's weird it still shows as detected as of today, so this might because of the Component Updates where you are a little behind.

In case it's still detected after doing the above (updating), please Quit malwarebytes from the systemtray.
Then navigate to the following folder:


In there, locate the file HubbleCache and delete it.

Restart Malwarebytes again. A new Hubblecache will then be created again, so it will properly pick it up and remember to not detect this anymore.

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