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

What is Backdoor:Win32/Dynamer!ac infection?

In this article you will find about the definition of Backdoor:Win32/Dynamer!ac as well as its adverse effect on your computer. Such ransomware are a kind of malware that is specified by on-line frauds to demand paying the ransom by a sufferer.

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In the majority of the cases, Backdoor:Win32/Dynamer!ac ransomware will certainly instruct its victims to start funds move for the purpose of reducing the effects of the modifications that the Trojan infection has introduced to the target’s device.

Backdoor:Win32/Dynamer!ac Summary

These modifications can be as follows:

  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Ciphering the papers located on the target’s hard drive — so the sufferer can no longer make use of the data;
  • Preventing routine accessibility 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.


The most normal networks through which Backdoor:Win32/Dynamer!ac Trojans are injected are:

  • By methods of phishing emails;
  • As a repercussion of customer ending up on a source that hosts a malicious software;

As soon as the Trojan is effectively infused, it will certainly either cipher the data on the target’s computer or stop the tool from operating in an appropriate manner – while additionally putting a ransom money note that discusses the need for the targets to impact the repayment for the purpose of decrypting the papers or recovering the documents system back to the initial condition. In the majority of circumstances, the ransom note will certainly show up when the customer reboots the PC after the system has currently been harmed.

Backdoor:Win32/Dynamer!ac distribution channels.

In different corners of the globe, Backdoor:Win32/Dynamer!ac grows by leaps as well as bounds. However, the ransom notes and methods of extorting the ransom amount may differ depending upon particular regional (local) setups. The ransom money notes and also tricks of extorting the ransom amount may differ depending on certain regional (regional) settings.

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software application.

    In particular locations, the Trojans commonly wrongfully report having identified some unlicensed applications made it possible for on the target’s gadget. The alert after that requires the individual to pay the ransom.

    Faulty statements regarding prohibited material.

    In countries where software application piracy is less preferred, this method is not as effective for the cyber fraudulences. Conversely, the Backdoor:Win32/Dynamer!ac popup alert might falsely declare to be stemming from a police establishment and will report having situated kid pornography or various other illegal data on the tool.

    Backdoor:Win32/Dynamer!ac popup alert may wrongly assert to be deriving from a law enforcement establishment as well as will certainly report having situated kid porn or other illegal data on the tool. The alert will similarly have a need for the user to pay the ransom.

Technical details

File Info:

crc32: 2B36BCCC
md5: 951c80c070f9335298cb1d6556419477
name: 951C80C070F9335298CB1D6556419477.mlw
sha1: f56369c45f5e7e2333af537de0352f46c0750e06
sha256: a6849e5b45225ac247d2ab7aba622b36acc77395e642c00f57300182dd93f471
sha512: 280875907f05cc44fbf61f66395b68407f99ac8c9dafa97f1f3d0bad8eb07cc8a2f5d082fd3c1727432a7de7c839b142f81dfb3e1707d3931dfe626b1dcea66e
ssdeep: 3072:azhZbEz1LUwVmbM0H0tRekPQJOQG7oRUBZAactODPw5sKc37kfyWN10x4vLeJ5h:Xp7syx/mUJPDtHLkVrCVYd9jM2
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: labDV All rights reserved.
InternalName: Respondents Used
CompanyName: labDV
FileDescription: Randomize Avoiding Hfa 140
LegalTrademarks: labDV All rights reserved.
Comments: Randomize Avoiding Hfa 140
ProductName: Respondents Used
OriginalFilename: Respondents Used.exe
Translation: 0x0409 0x04b0

Backdoor:Win32/Dynamer!ac also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Spyware ( 0055e3db1 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop6.47188
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ransom.Locky.10
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba TrojanSpy:Win32/Generic.fec1d28b
K7GW Spyware ( 0055e3db1 )
Cybereason malicious.070f93
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Spy.Zbot.ACM
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky UDS:Trojan.Win32.Yakes.gen
BitDefender Gen:Variant.Ransom.Locky.10
NANO-Antivirus Trojan.Win32.Drop.efmkpm
MicroWorld-eScan Gen:Variant.Ransom.Locky.10
Ad-Aware Gen:Variant.Ransom.Locky.10
Sophos Mal/Generic-S
F-Secure Heuristic.HEUR/AGEN.1138861
BitDefenderTheta Gen:NN.ZexaF.34722.su0@a8l4t@ni
VIPRE Trojan.Win32.Generic!BT
TrendMicro Mal_MiliCry-1c
McAfee-GW-Edition BehavesLike.Win32.Trojan.fc
Emsisoft Gen:Variant.Ransom.Locky.10 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1138861
eGambit Generic.Malware
Antiy-AVL Trojan/Generic.ASMalwS.1A30F1C
Kingsoft Win32.Troj.Yakes.qp.(kcloud)
Microsoft Backdoor:Win32/Dynamer!ac
Arcabit Trojan.Ransom.Locky.10
AegisLab Trojan.Multi.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Variant.Ransom.Locky.10
Acronis suspicious
McAfee Artemis!951C80C070F9
MAX malware (ai score=100)
Malwarebytes MachineLearning/Anomalous.100%
Panda Trj/GdSda.A
TrendMicro-HouseCall Mal_MiliCry-1c
Rising [email protected] (RDML:KFT+U2/p7lUvFVNs4tlmmA)
Yandex TrojanSpy.Zbot!4AZuJRLQQ+Q
Ikarus Trojan-Spy.Agent
Fortinet W32/Zbot.ACM!tr.spy
AVG Win32:Trojan-gen

How to remove Backdoor:Win32/Dynamer!ac 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 Backdoor:Win32/Dynamer!ac 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 Backdoor:Win32/Dynamer!ac 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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