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

What is TrojanDropper:Win32/Gamarue.A infection?

In this short article you will discover about the meaning of TrojanDropper:Win32/Gamarue.A and also its negative effect on your computer. Such ransomware are a type of malware that is elaborated by on-line scams to require paying the ransom by a victim.

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Most of the cases, TrojanDropper:Win32/Gamarue.A ransomware will instruct its victims to launch funds transfer for the function of reducing the effects of the amendments that the Trojan infection has actually introduced to the victim’s gadget.

TrojanDropper:Win32/Gamarue.A Summary

These alterations 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • 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.
  • A process attempted to delay the analysis task.;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Detects Sandboxie through the presence of a library;
  • 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. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Mimics the file times of a Windows system file;
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Checks the presence of disk drives in the registry, possibly for anti-virtualization;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records found on the sufferer’s disk drive — so the victim can no longer utilize the data;
  • Preventing normal 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.
Similar behavior
Related domains Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa Ransom:Win32/Blocker.f25b02aa


One of the most common channels through which TrojanDropper:Win32/Gamarue.A Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of user winding up on a resource that organizes a malicious software program;

As quickly as the Trojan is effectively infused, it will certainly either cipher the data on the victim’s PC or avoid the gadget from working in a proper manner – while likewise positioning a ransom note that states the need for the victims to effect the payment for the function of decrypting the files or restoring the data system back to the initial problem. In many circumstances, the ransom note will certainly turn up when the client restarts the PC after the system has already been damaged.

TrojanDropper:Win32/Gamarue.A distribution channels.

In various edges of the globe, TrojanDropper:Win32/Gamarue.A grows by jumps and also bounds. However, the ransom notes as well as methods of obtaining the ransom quantity might differ depending upon particular regional (regional) setups. The ransom notes and also tricks of obtaining the ransom money quantity may differ depending on particular neighborhood (local) settings.

Ransomware injection

For instance:

    Faulty informs concerning unlicensed software application.

    In certain areas, the Trojans typically wrongfully report having detected some unlicensed applications allowed on the victim’s device. The sharp then requires the customer to pay the ransom.

    Faulty statements about illegal material.

    In nations where software program piracy is much less popular, this approach is not as effective for the cyber frauds. Additionally, the TrojanDropper:Win32/Gamarue.A popup alert may incorrectly assert to be stemming from a law enforcement organization and will certainly report having located child pornography or other unlawful information on the gadget.

    TrojanDropper:Win32/Gamarue.A popup alert might wrongly declare to be acquiring from a law enforcement organization as well as will report having situated child porn or other illegal information on the device. The alert will likewise have a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 70D4687E
md5: ee62e405569438eab3fd866f439a0860
name: EE62E405569438EAB3FD866F439A0860.mlw
sha1: 43b83d3273c81ca22a62dd7defbd0c994822ac97
sha256: 55341b46c391ea8e3be1ac3981ebbbe7c32a37ea10570a42c26a49b9349462bb
sha512: bbac9cc34a4e65159c66b9e43f6a3bcc32767d02bedfbb8e1ea636cb9f6ef47d77413076aa67368a70e209f9c1d795e6de5d3ba3ced274054b0ed2f07ab1294f
ssdeep: 3072:VCj9MkFqf4CtZ6N6LGaMS5cdqTEtxeZwp92BTJKY8YL2tH54YHSSvd:VCj9XUf4MZWWGZS5cYFyq9KPYLOH5N7
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

TrojanDropper:Win32/Gamarue.A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0055dd191 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop4.25343
Cynet Malicious (score: 100)
ALYac Gen:Variant.Graftor.70863
Cylance Unsafe
Zillya Trojan.Blocker.Win32.35363
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Blocker.f25b02aa
K7GW Trojan ( 0055dd191 )
Cybereason malicious.556943
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Bundpil.A
APEX Malicious
Avast Win32:Fareit-CW [Trj]
ClamAV Win.Trojan.Agent-1376700
Kaspersky Trojan-Ransom.Win32.Blocker.gazb
BitDefender Gen:Variant.Graftor.70863
NANO-Antivirus Trojan.Win32.PornoAsset.brqxjr
ViRobot Trojan.Win32.Z.Graftor.184320.BR
MicroWorld-eScan Gen:Variant.Graftor.70863
Tencent Win32.Trojan.Blocker.Amvq
Ad-Aware Gen:Variant.Graftor.70863
Sophos Mal/Generic-S
Comodo TrojWare.Win32.ButeRat.PP@4roeaa
BitDefenderTheta Gen:NN.ZexaF.34690.luX@aqHH!vni
VIPRE Trojan.Win32.Zbocheman.dca (v)
TrendMicro Ransom_Blocker.R002C0DEJ21
Emsisoft Gen:Variant.Graftor.70863 (B)
SentinelOne Static AI – Malicious PE
Avira WORM/Gamarue.ioemn
Microsoft TrojanDropper:Win32/Gamarue.A
AegisLab Trojan.Win32.Blocker.j!c
GData Gen:Variant.Graftor.70863
Acronis suspicious
McAfee Artemis!EE62E4055694
MAX malware (ai score=100)
VBA32 BScope.Trojan.Packed
TrendMicro-HouseCall Ransom_Blocker.R002C0DEJ21
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.GenAsa!ZAyuuhM/QRE
Ikarus Worm.Win32.Bundpil
Fortinet W32/Katusha.N
AVG Win32:Fareit-CW [Trj]

How to remove TrojanDropper:Win32/Gamarue.A 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 TrojanDropper:Win32/Gamarue.A 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 TrojanDropper:Win32/Gamarue.A 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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