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

What is Win32/HacDef.NBC infection?

In this post you will certainly discover concerning the meaning of Win32/HacDef.NBC as well as its unfavorable effect on your computer. Such ransomware are a type of malware that is elaborated by online fraudulences to require paying the ransom money by a sufferer.

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Most of the cases, Win32/HacDef.NBC virus will advise its targets to launch funds move for the purpose of counteracting the modifications that the Trojan infection has introduced to the victim’s tool.

Win32/HacDef.NBC Summary

These modifications can be as adheres to:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • Loads a driver;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Attempts to stop active services;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the victim’s hard drive — so the sufferer can no longer make use of the information;
  • Preventing regular 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.


One of the most regular channels whereby Win32/HacDef.NBC are injected are:

  • By means of phishing e-mails;
  • As a consequence of customer ending up on a resource that holds a malicious software application;

As quickly as the Trojan is efficiently infused, it will either cipher the data on the victim’s PC or protect against the device from functioning in a correct way – while likewise putting a ransom money note that points out the demand for the targets to impact the payment for the purpose of decrypting the records or recovering the data system back to the initial condition. In the majority of instances, the ransom note will certainly show up when the client reboots the COMPUTER after the system has currently been damaged.

Win32/HacDef.NBC circulation networks.

In numerous edges of the globe, Win32/HacDef.NBC grows by jumps and bounds. Nevertheless, the ransom notes and methods of extorting the ransom money amount might differ depending upon particular regional (local) setups. The ransom notes and also methods of extorting the ransom quantity might vary depending on certain local (local) setups.

Ransomware injection

As an example:

    Faulty alerts regarding unlicensed software application.

    In certain locations, the Trojans typically wrongfully report having spotted some unlicensed applications made it possible for on the sufferer’s tool. The sharp after that demands the individual to pay the ransom.

    Faulty declarations concerning illegal material.

    In nations where software application piracy is less popular, this technique is not as efficient for the cyber fraudulences. Additionally, the Win32/HacDef.NBC popup alert may wrongly assert to be stemming from a law enforcement organization and also will certainly report having located kid porn or various other unlawful data on the device.

    Win32/HacDef.NBC popup alert might incorrectly declare to be obtaining from a regulation enforcement institution and will certainly report having located child porn or other prohibited information on the gadget. The alert will similarly contain a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 1B6D5B97
md5: 3a0a9e1a422080c413a28e1e28234f99
name: 3A0A9E1A422080C413A28E1E28234F99.mlw
sha1: 6a3678652b778b9ccaa011fe6a45a6d90d84a843
sha256: 926a8712e5e75d083302c0141f4aa355fcce188d64db40e04a4e7d8da90b4e93
sha512: 043b36198267ff0f72857ad45c861a6a808808e9cc01d92c6e76d60cf533002a4df7c871597df0929dbf9ab598868b9a90b1ee5f349b76b4f2a7f455fa15962b
ssdeep: 768:EpYNaBDHNOJrJzsdDwbN9yyGGGGrBcGZzQ/:EpYNaBDHNsrJ96GZz
type: PE32 executable (console) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/HacDef.NBC also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 00000ce11 )
Elastic malicious (high confidence)
DrWeb BackDoor.HackDef.100
MicroWorld-eScan Gen:Variant.Ransom.Xdata.11
CAT-QuickHeal Backdoor.HacDef
ALYac Gen:Variant.Ransom.Xdata.11
Malwarebytes Trojan.MalPack
Zillya Backdoor.Hacdef.Win32.535
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Backdoor:Win32/HacDef.e5ad902e
K7GW Trojan ( 00000ce11 )
Cybereason malicious.a42208
NANO-Antivirus Trojan.Win32.HacDef.dxkabh
Cyren W32/Hacdef.LWLT-0807
ESET-NOD32 a variant of Win32/HacDef.NBC
APEX Malicious
Avast FileRepMalware
Cynet Malicious (score: 100)
BitDefender Gen:Variant.Ransom.Xdata.11
ViRobot Backdoor.Win32.HacDef.32768
Tencent Win32.Backdoor.Hacdef.Liqs
Ad-Aware Gen:Variant.Ransom.Xdata.11
Sophos Mal/Generic-R + Troj/HackerD-B
Comodo MalCrypt.Indus!@1qrzi1
BitDefenderTheta AI:Packer.2BDB4CC21F
VIPRE Trojan.Win32.Generic!BT
Emsisoft Gen:Variant.Ransom.Xdata.11 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Packed.Morphine.a
Webroot W32.Backdoor.Gen
Avira TR/Crypt.Morphine.Gen
eGambit Generic.Malware
Kingsoft Win32.Hack.MorphineT.a.(kcloud)
Arcabit Trojan.Ransom.Xdata.11
AegisLab Trojan.Win32.HacDef.4!c
GData Gen:Variant.Ransom.Xdata.11
TACHYON Backdoor/W32.HacDef.32768
Acronis suspicious
MAX malware (ai score=100)
VBA32 Backdoor.HacDef
Panda HackTool/HackerDef
Rising Backdoor.HacDef.hp (CLASSIC)
Yandex Trojan.GenAsa!zN2LJ8tGEnQ
Ikarus Worm.Win32.Randex.a
MaxSecure Trojan.Malware.1759867.susgen
Fortinet W32/NewThreat!Morphine
AVG FileRepMalware

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

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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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