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Nexus Fusion
(@david-vernon)
Eminent Member Customer

Good morning,

      I have been using the software for over a year no issues.  This Laptop is not used for the internet only for this software and the only reason it's on the internet is because the NIP software needs it to open.

Today, I have pressed (disconnect) and when clicking on (connect) button in NIP software it closed when I went to re open it it gave the attached warning.  (I Always leave the software running from the day before)

Any idea on this please?

Having a look it's this virus.

Virus:W32/Virut

Classification

Category 

Malware

Type 

Virus

Aliases 

Virus:W32/Virut, Virus.Win32.Virut, Win32.Virtob

Summary

Variants in the Virut family (also known as Virtob) are polymorphic, memory-resident, appending file infectors that have Entry Point Obscuring (EPO) capabilities.

Removal

Technical Details

Viruses belonging to this family infect files with .EXE and .SCR extensions. All viruses belonging to the Virut family also contain an IRC-based backdoor that provides unauthorized access to infected computers.

Some Virut variants contain the following text strings:

  • O noon of life! O time to celebrate!
  • O summer garden!
  • Relentlessly happy and expectant, standing: -
  • Watching all day and night, for friends I wait:
  • Where are you, friends? Come! It is time! It's late!

Entry Point Obscuring

Virut is a polymorphic appending file infector with EPO (Entry Point Obscuring) capabilities. The virus uses several infection methods:

  • Method 1: The virus relocates a certain amount of bytes from the entry point of the original file and writes its initial decryptor there. So when an infected file is run, the virus code gets control first. The initial decryptor then decrypts a small part of the virus's body that is appended to the end of the infected file and passes control to it.
  • Method 2: The virus appends its code to the end of the file and changes the entry point address of the original program so it points to the start of the appended viral code, where the decryptor is located. This is the most common way of infecting files for appending parasitic infectors.
  • Method 3: The virus writes its initial code into a gap (empty space) in the end of the original file's code section and redirects the entry point address to that code. The initial code decrypts a small part of the virus body and passes control to it. Then the main decryptor takes control and decrypts the rest of the virus body. Once the file is infected, the virus patches the first found API call (from the entry point address) in the original program so that instead of the API, it calls the initial virus decryptor. That decryptor may be located in the end of the code section as said above.

Activity

The virus checks whether or not it is already active. If it is, then depending on the infection method used, the virus does one of the following:

  • Relocates the original file's data back to its place and passes control to it
  • Returns control to the original file's entry point address
  • Calls the replaced API itself and then passes control to the original program.

If the virus is not yet active, the second decryptor decrypts the rest of the virus body and initiates installation cycle. During the installation cycle, the virus injects its code into a system process, hooks a few low-level Windows API calls and stays resident in memory. When a file with .EXE or .SCR extension is opened or run, the virus tries to infect it with one of its four methods.

Backdoor

The virus contains an IRC-based backdoor. The backdoor connects to the pre-defined IRC server (ircd.zief.pl in the latest variants) and joins the "virtu" channel. The author of the virus can give commands to all or to specific bots created by the virus in the channel. The bot is quite primitive - it allows a hacker to download and run files from Internet.

20250110 083122
20250110 081934
20250110 082049

 

This topic was modified 1 month ago 2 times by Nexus Fusion
This topic was modified 1 month ago by Nicusor
ReplyQuote
Topic starter Posted : 10/01/2025 8:44 am
Topic Tags
_Busa
(@_busa)
Active Member Customer

Same thing here with my analysers.

What's going on ?

I'm on an enterprise network and I can't take that kind of risk! The soft need to be 100% safe.

Thanks

ReplyQuote
Posted : 10/01/2025 12:05 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator

 Binary is encrypted to prevent hackers attacks. Some antivirus software treats encrypted binary like a virus and raise a warning flag. Contact your antivirus provider to add NLBA1 Software to exception list. It was certified by EU authorities so its guaranteed to be virus free. 

ReplyQuote
Posted : 10/01/2025 1:05 pm
FJ
 FJ
(@brs)
Noble Member Customer
image

I am using windows 11 and no other antivirus. only windows virus protection. until now, there was no threat but today windows is detecting as severe threat.

ReplyQuote
Posted : 11/01/2025 10:56 am
FJ
 FJ
(@brs)
Noble Member Customer
image

why did not windows detect it as threat until now.

is it possible that software got infected by other means? or is it due to encrypted binary as you explained? 

ReplyQuote
Posted : 11/01/2025 11:02 am
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Posted by: @brs

windows 11

Windows 11 are known for its background updates without user contest. 

Posted by: @brs

why did not windows detect it as threat until now.

It looks like Windows 11 updated their antivirus database recently. NLBA1 software encryption become stronger since v4.6.0 to prevent hackers attack so it was unknown to Win11 untill latest update. 

Posted by: @brs

is it possible that software got infected by other means?

You could check MD5 of your binary with reference value downloaded and installed from website. Infected binary should have different checksum. Anyway infecting encrypted binary is not easy task even for skilled hackers. 

ReplyQuote
Posted : 11/01/2025 12:37 pm
FJ liked
askari
(@askari)
Eminent Member Customer

I'm having the same issues with Windows 11, started today, blocking/removing NLBA1, now file can't be opened.

ReplyQuote
Posted : 11/01/2025 4:47 pm
DjiBattWorkshop
(@djibattworkshop)
Member Moderator
Nexus Fusion
(@david-vernon)
Eminent Member Customer
trog

Just come in today and the software was removed with this message.

 

I have now added the folder to be excluded for now but await IT to advise.

This post was modified 2 weeks ago by Nexus Fusion
ReplyQuote
Topic starter Posted : 30/01/2025 8:45 am
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