Written by Robert Bailey

What is Worm:Win32/Nuj.B infection?

In this article you will locate concerning the meaning of Worm:Win32/Nuj.B and also its negative effect on your computer system. Such ransomware are a kind of malware that is clarified by online fraudulences to require paying the ransom money by a victim.

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Most of the instances, Worm:Win32/Nuj.B ransomware will certainly advise its sufferers to launch funds transfer for the purpose of neutralizing the changes that the Trojan infection has actually introduced to the target’s device.

Worm:Win32/Nuj.B Summary

These alterations can be as adheres to:

  • Executable code extraction;
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Possible date expiration check, exits too soon after checking local time;
  • Creates RWX memory;
  • Reads data out of its own binary image;
  • Drops a binary and executes it;
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to repeatedly call a single API many times in order to delay analysis time;
  • Installs itself for autorun at Windows startup;
  • Creates a hidden or system file;
  • Ciphering the records situated on the victim’s hard disk — so the target can no longer use the information;
  • Preventing routine access to the victim’s workstation;

Related domains:

haoer1314.3322.org BehavesLike.Win32.VirRansom.tc


One of the most typical networks whereby Worm:Win32/Nuj.B Ransomware Trojans are injected are:

  • By means of phishing e-mails;
  • As an effect of individual ending up on a source that holds a harmful software program;

As soon as the Trojan is efficiently injected, it will certainly either cipher the data on the target’s PC or stop the tool from working in a correct way – while additionally putting a ransom money note that mentions the need for the sufferers to impact the repayment for the objective of decrypting the files or bring back the documents system back to the preliminary problem. In a lot of circumstances, the ransom money note will certainly come up when the client restarts the COMPUTER after the system has currently been harmed.

Worm:Win32/Nuj.B distribution networks.

In numerous edges of the globe, Worm:Win32/Nuj.B expands by jumps as well as bounds. However, the ransom money notes and techniques of obtaining the ransom money quantity might vary relying on particular local (regional) settings. The ransom notes and also techniques of obtaining the ransom amount might differ depending on specific local (local) setups.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software application.

    In specific areas, the Trojans usually wrongfully report having discovered some unlicensed applications allowed on the victim’s gadget. The alert then requires the user to pay the ransom money.

    Faulty statements about prohibited web content.

    In nations where software program piracy is less preferred, this approach is not as effective for the cyber scams. Conversely, the Worm:Win32/Nuj.B popup alert might incorrectly assert to be stemming from a police establishment as well as will report having located child pornography or other prohibited data on the gadget.

    Worm:Win32/Nuj.B popup alert may falsely claim to be obtaining from a regulation enforcement institution as well as will report having situated youngster pornography or other illegal data on the gadget. The alert will likewise contain a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: 9303DDF4
md5: 803887af72173be968a2f6ac13c1629d
name: 803887AF72173BE968A2F6AC13C1629D.mlw
sha1: 644c1a91ad0be94e692b9fd7d267d30f1a9020a6
sha256: 0485de45bb5104a05951b0b2d8bc19932eb262d11d7dc714d3d5a7229f5cc9f3
sha512: 713bc3cf28831a59524e0c7ce71c23bd184bbef27c612e2da45ecdd79bbec3c84927be85339f31c54ad8ad2c5abe75e5f50d2afa69a1e587107a72f216178539
ssdeep: 24576:4LeCCva0dogvUYIhA59MzzKFGJJexWig9BMKeZlMNoBiv:44DF8+Am2BMmiQv
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Worm:Win32/Nuj.B also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 7000000f1 )
Elastic malicious (high confidence)
DrWeb Trojan.Warring.39
ClamAV Win.Dropper.Small-1986
McAfee generic!bg.yk
Cylance Unsafe
Zillya Dropper.Joiner.Win32.974
CrowdStrike win/malicious_confidence_90% (D)
Alibaba Worm:Win32/Joiner.c0b3d981
K7GW Trojan ( 7000000f1 )
Cybereason malicious.f72173
Baidu Win32.Worm.AutoRun.gv
Cyren W32/Risk.FVEF-1798
Symantec Backdoor.Trojan
ESET-NOD32 a variant of Win32/Small.NES
APEX Malicious
Avast Win32:Patched-SW [Trj]
Cynet Malicious (score: 100)
Kaspersky Trojan-Dropper.Win32.Joiner.dc
BitDefender Backdoor.Hupigon.AAAH
NANO-Antivirus Trojan.Win32.Hupigon.blfkq
ViRobot Trojan.Win32.Joiner.29696
MicroWorld-eScan Backdoor.Hupigon.AAAH
Tencent Malware.Win32.Gencirc.10b3e4df
Ad-Aware Backdoor.Hupigon.AAAH
Sophos Mal/Generic-R + Mal/Behav-043
Comodo TrojWare.Win32.TrojanDropper.Joiner.G@n2arz
BitDefenderTheta AI:Packer.621C0F0B1F
VIPRE Trojan.Win32.Generic.pak!cobra
McAfee-GW-Edition BehavesLike.Win32.VirRansom.tc
FireEye Generic.mg.803887af72173be9
Emsisoft Backdoor.Hupigon.AAAH (B)
SentinelOne Static AI – Malicious PE
Jiangmin TrojanDropper.Joiner.eq
Avira TR/Dropper.Gen
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Generic.ASMalwS.20E52
Kingsoft Heur.SSC.1160789.1216.(kcloud)
Microsoft Worm:Win32/Nuj.B
ZoneAlarm Backdoor.Win32.Hupigon.dsx
GData Backdoor.Hupigon.AAAH
AhnLab-V3 Backdoor/Win32.Hupigon.R839
VBA32 TrojanDropper.Joiner
MAX malware (ai score=88)
Malwarebytes Malware.AI.2340336747
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_GREYBIRD.BM
Rising Dropper.Win32.SorfoM.ay (CLASSIC)
Yandex Trojan.GenAsa!ozrA/bwkwDg
Ikarus Backdoor.Win32.Hupigon
MaxSecure Trojan.W32.Klone.ap
Fortinet W32/Dropper.DAE!tr
AVG Win32:Patched-SW [Trj]
Paloalto generic.ml

How to remove Worm:Win32/Nuj.B 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 Worm:Win32/Nuj.B 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 Worm:Win32/Nuj.B you can always ask me in the comments for getting help.

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

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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