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

What is TrojanDropper:Win32/Bunitu infection?

In this article you will certainly locate about the definition of TrojanDropper:Win32/Bunitu and also its unfavorable impact on your computer. Such ransomware are a kind of malware that is clarified by online scams to demand paying the ransom money by a victim.

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In the majority of the situations, TrojanDropper:Win32/Bunitu infection will instruct its victims to initiate funds move for the function of reducing the effects of the modifications that the Trojan infection has introduced to the victim’s device.

TrojanDropper:Win32/Bunitu 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.;
  • Starts servers listening on,;
  • A process created a hidden window;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • 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. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Attempts to identify installed AV products by registry key;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the victim’s hard disk drive — so the sufferer can no more use the information;
  • Preventing regular accessibility to the target’s workstation;
Similar behavior
Related domains TrojWare.Win32.Ransom.GandCrypt.B@7ikv0k TrojWare.Win32.Ransom.GandCrypt.B@7ikv0k


The most common networks where TrojanDropper:Win32/Bunitu Trojans are infused are:

  • By ways of phishing e-mails;
  • As an effect of customer ending up on a resource that organizes a malicious software;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the data on the target’s PC or protect against the device from functioning in an appropriate fashion – while likewise positioning a ransom note that states the requirement for the targets to impact the payment for the objective of decrypting the files or restoring the data system back to the preliminary condition. In most circumstances, the ransom note will certainly turn up when the customer reboots the PC after the system has actually currently been damaged.

TrojanDropper:Win32/Bunitu circulation channels.

In numerous edges of the globe, TrojanDropper:Win32/Bunitu grows by jumps and bounds. However, the ransom money notes and methods of obtaining the ransom money quantity may vary depending on specific local (regional) settings. The ransom money notes as well as techniques of obtaining the ransom quantity might vary depending on specific regional (regional) settings.

Ransomware injection

For example:

    Faulty notifies about unlicensed software application.

    In certain areas, the Trojans frequently wrongfully report having discovered some unlicensed applications made it possible for on the target’s device. The sharp then demands the individual to pay the ransom money.

    Faulty declarations regarding unlawful content.

    In nations where software application piracy is less preferred, this method is not as efficient for the cyber fraudulences. Additionally, the TrojanDropper:Win32/Bunitu popup alert may falsely assert to be originating from a police institution and also will report having located child pornography or various other prohibited data on the device.

    TrojanDropper:Win32/Bunitu popup alert may falsely claim to be deriving from a legislation enforcement institution and will certainly report having located child pornography or other unlawful data on the gadget. The alert will likewise have a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: A9D665CC
md5: fc73da0c1d13e05a8873ddc4cd4f3b10
name: FC73DA0C1D13E05A8873DDC4CD4F3B10.mlw
sha1: ee24df67b3b7cf1630389cb5bfe6f9a2f02715fe
sha256: f2091a5a98364efb10627817f998ad1bc246489e9507a28a0c3f5f28ad4cb058
sha512: 01bc645c14072b7ef42d9af16a074c49e4ed04a4688e13865029b6d26157bfc88e697b05e0a4ee68685cce459a5ac28d87a6f6397b85325e54706cf6e1d24ed5
ssdeep: 3072:3EjwAUvfuTlMmZOtC23YfnoUyM271Olg67mBpxvVHNodpApTjaPS:3KwsCmsbYTyymDhVNodp62
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

TrojanDropper:Win32/Bunitu also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader25.43213
MicroWorld-eScan Trojan.BRMon.Gen.1
Qihoo-360 Win32/Trojan.Generic.HwoCslcA
McAfee Trojan-FMHE!FC73DA0C1D13
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Trojan.Win32.Save.a
K7AntiVirus Adware ( 00539ed31 )
BitDefender Trojan.BRMon.Gen.1
K7GW Adware ( 00539ed31 )
CrowdStrike win/malicious_confidence_100% (W)
BitDefenderTheta Gen:NN.ZexaF.34590.nyW@a02tfsci
Cyren W32/S-23b82f3a!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Avast FileRepMalware
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Trojan:Win32/Injector.ef58dd04
NANO-Antivirus Trojan.Win32.Blocker.ethltf
Tencent Malware.Win32.Gencirc.11496801
Ad-Aware Trojan.BRMon.Gen.1
Emsisoft Trojan.BRMon.Gen.1 (B)
Comodo TrojWare.Win32.Ransom.GandCrypt.B@7ikv0k
F-Secure Heuristic.HEUR/AGEN.1103318
Zillya Trojan.Blocker.Win32.38959
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
Sophos Mal/Generic-S + Mal/Ransom-FN
Ikarus Trojan-Proxy.Agent
Jiangmin Backdoor.Androm.sym
Avira HEUR/AGEN.1103318
Antiy-AVL Trojan[Ransom]/Win32.Blocker
Microsoft TrojanDropper:Win32/Bunitu
Arcabit Trojan.BRMon.Gen.1
SUPERAntiSpyware Trojan.Agent/Gen-Emotet
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.BRMon.Gen.1
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/MalPe34.Suspicious.X2029
Acronis suspicious
VBA32 BScope.Trojan.Downloader
ALYac Trojan.BRMon.Gen.1
MAX malware (ai score=99)
Malwarebytes Malware.AI.3772548570
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Injector.DSGN
TrendMicro-HouseCall Ransom_HPGANDCRAB.SMONT
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.GenAsa!lqfVPO/SuKo
SentinelOne Static AI – Suspicious PE
Fortinet W32/Kryptik.FWZD!tr
AVG FileRepMalware
Cybereason malicious.c1d13e
MaxSecure Trojan.Malware.300983.susgen

How to remove TrojanDropper:Win32/Bunitu ransomware?

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/Bunitu 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/Bunitu 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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