Win32/Small.NUC

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

What is Win32/Small.NUC infection?

In this post you will certainly find concerning the interpretation of Win32/Small.NUC and its negative influence on your computer. Such ransomware are a kind of malware that is specified by on-line frauds to require paying the ransom by a sufferer.

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In the majority of the cases, Win32/Small.NUC infection will instruct its sufferers to launch funds transfer for the purpose of reducing the effects of the changes that the Trojan infection has actually introduced to the target’s device.

Win32/Small.NUC Summary

These adjustments can be as follows:

  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files found on the target’s hard disk drive — so the victim can no more use the data;
  • Preventing routine access to the target’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Win32/Small.NUC

One of the most typical channels whereby Win32/Small.NUC Trojans are infused are:

  • By means of phishing e-mails;
  • As a consequence of customer ending up on a source that organizes a destructive software application;

As quickly as the Trojan is successfully injected, it will certainly either cipher the information on the sufferer’s computer or prevent the device from functioning in an appropriate way – while likewise placing a ransom money note that points out the need for the sufferers to impact the settlement for the objective of decrypting the files or bring back the file system back to the preliminary problem. In a lot of circumstances, the ransom money note will turn up when the client reboots the PC after the system has actually currently been harmed.

Win32/Small.NUC distribution channels.

In numerous edges of the world, Win32/Small.NUC grows by jumps and bounds. However, the ransom money notes and methods of obtaining the ransom money amount may differ relying on certain neighborhood (local) settings. The ransom money notes and methods of obtaining the ransom quantity may differ depending on particular local (local) setups.

Ransomware injection

For instance:

    Faulty signals about unlicensed software.

    In certain areas, the Trojans frequently wrongfully report having found some unlicensed applications allowed on the target’s device. The alert then demands the individual to pay the ransom.

    Faulty declarations concerning prohibited material.

    In countries where software piracy is less popular, this technique is not as effective for the cyber scams. Additionally, the Win32/Small.NUC popup alert might wrongly declare to be stemming from a police institution as well as will report having located child porn or various other prohibited information on the gadget.

    Win32/Small.NUC popup alert may falsely claim to be acquiring from a legislation enforcement organization and will certainly report having located youngster pornography or various other prohibited data on the tool. The alert will similarly have a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: E5F1B968
md5: 75cf0a27607112fac4776fe3bd7b7f84
name: 75CF0A27607112FAC4776FE3BD7B7F84.mlw
sha1: 68b3c6f8843a3a8ff809cacff4bac574b91ecd0b
sha256: 1e3690d5e1c37ff2c74830cc4d2478fdd5edd9ca339e65055415e2e8bb3f9034
sha512: ff59f7ac31f2d44d22205b574ea06a91b30ec575ed34550afdf08a95291b2c9e7f00b60a7f7c510e31b0c289ecbb06e649432813135aa5f59a7f0396b6b223cf
ssdeep: 384:5UdgmLVY7h6OmdhJwT5Lma/e2N035XHWkgZHWkgZHWkgjeTxN4iFhQHWkgoHWkgq:5il2sy
type: PE32 executable (console) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Small.NUC also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Ransom.RotorCrypt.8
FireEye Generic.mg.75cf0a27607112fa
Qihoo-360 Win32/Trojan.Generic.HgIASOQA
McAfee RDN/Generic.hbg
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.RotorCrypt.4!c
Sangfor Suspicious.Win32.SpikeAex.PEVFSZL
BitDefender Gen:Variant.Ransom.RotorCrypt.8
Cybereason malicious.760711
BitDefenderTheta Gen:NN.ZexaF.34608.cmW@aSWzWd
Cyren W32/Katusha.I.gen!Eldorado
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:Malware-gen
Alibaba Trojan:Win32/RotorCrypt.8bca9ca3
Rising Trojan.Occamy!8.F1CD (CLOUD)
Ad-Aware Gen:Variant.Ransom.RotorCrypt.8
Emsisoft Gen:Variant.Ransom.RotorCrypt.8 (B)
Comodo Malware@#1kct6sxotxre6
F-Secure Heuristic.HEUR/AGEN.1108149
McAfee-GW-Edition RDN/Generic.hbg
Sophos Mal/Generic-S
Ikarus Trojan.RotorCrypt
Avira HEUR/AGEN.1108149
Microsoft Trojan:Win32/Occamy.B
Arcabit Trojan.Ransom.RotorCrypt.8
GData Gen:Variant.Ransom.RotorCrypt.8
Cynet Malicious (score: 90)
ESET-NOD32 a variant of Win32/Small.NUC
Acronis suspicious
VBA32 BScope.Trojan.Tiggre
ALYac Gen:Variant.Ransom.RotorCrypt.8
Malwarebytes Generic.Malware/Suspicious
Yandex Trojan.GenAsa!Yn5xfP4bBcQ
Fortinet W32/Katusha.A!tr
AVG Win32:Malware-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (W)
MaxSecure Trojan.Malware.74116664.susgen

How to remove Win32/Small.NUC ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

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/Small.NUC 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

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

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

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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