Kaspersky failing to detect a .mmvb ransomware

[nayeem.arefin]

Hello,

These are my system details: 

 

Application name  Kaspersky Internet Security
Application version 21.3.10.391 (j)
Operating System Microsoft Windows 7 x 64 Service Pack 1 Build 7601

I've been running a fairly new version of Windows 7 until being infected by a ransomware.  It seems to be named as .mmvb ransomware.  I've done a Google Search and understood that after attaching the .mmvb extension to all documents in my PC it'll ask for a ransom.  The problem is that after installing Kaspersky Internet Security and running a scan, it's failing to detect the virus / ransomware.  I've added screenshots of a sample .mmvb in my Desktop, one in my Pen drive, and the result of a scan of my pen drive.  Should I reinstall Windows ? Thanks for the help.

 

 

 

 

[HUMOUD AL NEFAIE]

Upload it to Virustotal and share link here

[Flood and Flood's wife]

18 hours ago, nayeem.arefin said:

Kaspersky Internet Security, 21.3.10.391 (j), Microsoft Windows 7 x 64 Service Pack 1 Build 7601

I've been running a fairly new version of Windows 7 until being infected by a ransomware.  It seems to be named as .mmvb ransomware.  

Hello @nayeem.arefin, 

Welcome!

?also, mmvb ransomware appears to belong to the STOP/DJVU ransomware family, carefully follow this guide: How to remove Ransomware from Windows & decrypt files, by Danila T.

Thank you?
Flood?+?

Edited September 11, 2022 by Flood and Flood's wife

[Berny]

@nayeem.arefin 

⚠️ Please create a backup  of the encrypted drive before proceeding.

[nayeem.arefin]

Thanks for replying.  @Humoud Al Nefaie:

https://www.virustoal.com/gui/file/b9b14e22644000af14453dd0755eedb683eb72bf151809283a92168513d0eae2?nocache=1

https://www.virustotal.com/gui/file/2510fb6b2ada2db7c8f32035b0a862c17ade05eaad8e3097927992e4cce1e600?nocache=1

https://www.virustotal.com/gui/file/5bc26f9d01dfd10eca570ac13644ca72f8fe710cf673a778eab1ffa97ecdd68c?nocache=1

 

[Berny]

@nayeem.arefin

Unfortunately in a lot of cases  files can't be decrypted without the private key that is only known by the attacker.

[nayeem.arefin]

@Berny:  I use a Windows 7 whilst the emsisoft Decryptor Tool seems to be only for Windows 10 64 Bit and above.  I need to know, if I manually or Shft + Del all the infected files , and also the files from my portable Hard Disk, will this be enough?  Or, should I format the disks?  Will be malware be gone if I reinstall windows ?

[Berny]

@nayeem.arefin

Before proceeding with a low level formatting please contact Kaspersky Technical Support.