What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Win32/Expiro.NAS infection?

In this article you will find regarding the meaning of Win32/Expiro.NAS as well as its adverse impact on your computer. Such ransomware are a form of malware that is elaborated by on-line frauds to demand paying the ransom by a target.

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Most of the situations, Win32/Expiro.NAS virus will certainly advise its sufferers to launch funds transfer for the objective of counteracting the modifications that the Trojan infection has presented to the victim’s gadget.

Win32/Expiro.NAS Summary

These modifications can be as complies with:

  • The binary likely contains encrypted or compressed data.;
  • Network activity detected but not expressed in API logs;
  • Ciphering the records situated on the sufferer’s hard drive — so the target can no longer utilize the data;
  • Preventing normal accessibility to the target’s workstation;

Related domains:


One of the most regular networks where Win32/Expiro.NAS Ransomware Trojans are injected are:

  • By ways of phishing emails;
  • As a consequence of individual ending up on a resource that organizes a destructive software application;

As soon as the Trojan is efficiently injected, it will either cipher the data on the sufferer’s PC or avoid the tool from working in a proper manner – while likewise placing a ransom note that mentions the requirement for the targets to effect the settlement for the function of decrypting the files or bring back the file system back to the first condition. In the majority of circumstances, the ransom money note will show up when the client restarts the COMPUTER after the system has already been damaged.

Win32/Expiro.NAS distribution channels.

In numerous edges of the world, Win32/Expiro.NAS grows by jumps and also bounds. However, the ransom money notes as well as tricks of extorting the ransom money amount may vary depending on specific regional (local) settings. The ransom notes and also techniques of obtaining the ransom money amount might differ depending on specific neighborhood (regional) settings.

Ransomware injection

For instance:

    Faulty alerts regarding unlicensed software program.

    In certain locations, the Trojans typically wrongfully report having discovered some unlicensed applications made it possible for on the victim’s device. The alert after that demands the individual to pay the ransom.

    Faulty statements concerning unlawful web content.

    In countries where software application piracy is much less popular, this approach is not as effective for the cyber fraudulences. Alternatively, the Win32/Expiro.NAS popup alert might falsely declare to be originating from a law enforcement organization as well as will certainly report having located youngster porn or other illegal information on the gadget.

    Win32/Expiro.NAS popup alert may incorrectly declare to be acquiring from a regulation enforcement organization as well as will certainly report having situated child porn or other illegal data on the gadget. The alert will similarly have a demand for the user to pay the ransom.

Technical details

File Info:

crc32: E53354B6
md5: df4688b9773f0cee0aeb53f7b0745c87
name: DF4688B9773F0CEE0AEB53F7B0745C87.mlw
sha1: cbccd4395a7c084614e387b14aa91a5288295697
sha256: ee4ad22545746e1a6795f8b09eba1a6e5666800c5cb5e3f9a141e208621017f2
sha512: f3aea129742d750b589a6f7ae4992512f2f7eb85ebccda562325fc3c67e6ed9fdea6289e3d444ade713894049599985ecf15926011af466268f0cebdec1f04cd
ssdeep: 3072:Yw76gtPnYwerA5f8vTY/Y6rzOEatR2CLoaStrrOzIy/FyQR3:NznQmfmYv42aMrC0MjR
type: MS-DOS executable, MZ for MS-DOS

Version Info:

LegalCopyright: Copyright xa9 1985-2000 Microsoft Corporation. All rights reserved. Portions Copyright xa9 1997-2000 Veritas Software. All rights reserved.
InternalName: dmadmin
FileVersion: 2600.2180.503.0
CompanyName: Microsoft Corp., Veritas Software
ProductName: Logical Disk Manager for Windows NT
ProductVersion: 1.0
FileDescription: Logical Disk Manager service process
OriginalFilename: dmadmin.exe
Translation: 0x0409 0x04e4

Win32/Expiro.NAS also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 005376ae1 )
Lionic Trojan.Win32.Expiro.4!c
Elastic malicious (high confidence)
DrWeb Win32.Expiro.51
Cynet Malicious (score: 100)
ALYac Win32.Expiro.BC
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Virus:Win32/Expiro.a35463e6
K7GW Trojan ( 005376ae1 )
Cybereason malicious.9773f0
Cyren W32/Patched.E.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Expiro.NAS
APEX Malicious
Avast Win32:Expiro-BY
BitDefender Win32.Expiro.BC
NANO-Antivirus Trojan.Win32.Expiro.fnmljh
MicroWorld-eScan Win32.Expiro.BC
Tencent Win32.Virus.Expiro.Wtni
Ad-Aware Win32.Expiro.BC
Sophos Mal/Generic-S
Comodo MalCrypt.Indus!@1qrzi1
BitDefenderTheta AI:FileInfector.7E32D4940F
Emsisoft Win32.Expiro.BC (B)
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_93%
Antiy-AVL Trojan/Generic.ASVirus.15E
Microsoft Virus:Win32/Expiro.gen!F
GData Win32.Expiro.BC
Acronis suspicious
MAX malware (ai score=88)
Panda Trj/CI.A
Fortinet W32/Expiro.NR
AVG Win32:Expiro-BY

How to remove Win32/Expiro.NAS virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Win32/Expiro.NAS files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Win32/Expiro.NAS you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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