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

What is TrojanDownloader:O97M/Obfuse.TB!MTB infection?

In this article you will certainly locate about the interpretation of TrojanDownloader:O97M/Obfuse.TB!MTB as well as its unfavorable effect on your computer system. Such ransomware are a kind of malware that is elaborated by online scams to demand paying the ransom money by a target.

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In the majority of the instances, TrojanDownloader:O97M/Obfuse.TB!MTB ransomware will instruct its targets to initiate funds transfer for the function of reducing the effects of the amendments that the Trojan infection has presented to the victim’s device.

TrojanDownloader:O97M/Obfuse.TB!MTB Summary

These adjustments 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.
  • Attempts to mimic the file extension of a PDF document by having ‘pdf’ in the file name.;
  • 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.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records situated on the victim’s disk drive — so the sufferer can no more make use of the information;
  • Preventing routine access to the sufferer’s workstation;


The most regular channels whereby TrojanDownloader:O97M/Obfuse.TB!MTB Ransomware Trojans are infused are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As an effect of customer ending up on a resource that organizes a malicious software;

As quickly as the Trojan is effectively infused, it will either cipher the data on the target’s PC or stop the gadget from working in an appropriate manner – while additionally placing a ransom money note that points out the demand for the sufferers to effect the settlement for the purpose of decrypting the files or recovering the file system back to the preliminary problem. In many circumstances, the ransom note will certainly show up when the customer restarts the PC after the system has actually already been harmed.

TrojanDownloader:O97M/Obfuse.TB!MTB distribution networks.

In numerous edges of the globe, TrojanDownloader:O97M/Obfuse.TB!MTB grows by leaps and bounds. However, the ransom money notes as well as techniques of obtaining the ransom money amount may differ depending on particular regional (local) setups. The ransom money notes and tricks of extorting the ransom money amount might differ depending on certain regional (local) setups.

Ransomware injection

For example:

    Faulty notifies concerning unlicensed software program.

    In specific areas, the Trojans frequently wrongfully report having actually spotted some unlicensed applications enabled on the victim’s tool. The alert then requires the user to pay the ransom money.

    Faulty declarations concerning unlawful content.

    In nations where software application piracy is less preferred, this approach is not as reliable for the cyber frauds. Conversely, the TrojanDownloader:O97M/Obfuse.TB!MTB popup alert might wrongly claim to be originating from a police institution as well as will report having situated child pornography or various other illegal information on the device.

    TrojanDownloader:O97M/Obfuse.TB!MTB popup alert might incorrectly claim to be deriving from a regulation enforcement institution and will report having situated child porn or various other prohibited data on the tool. The alert will in a similar way contain a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 8E92A9FD
md5: 7babd6f78dc0130c4a2f1f70372b7eef
name: PO.pdf.exe
sha1: 099a0523cca3421d0f509b75c2ec7cb6edd408c9
sha256: 4d96c3174270c15eb577221bc253988f44554f1d5c45904cab9ed0f031f9d6f3
sha512: ba350b1c7065fa85af32b0db664fa5d2ad497a707e55b5bb0558dd08304f69db77177e95881167bcb315a124cfac54b9157b8e520ef991ddecb428440255c776
ssdeep: 384:eJG8frqA7/nmN/h/Em6O85R2CssXzEfMg8AjtaQY63UQ7yKQ:eJR+j1hR6btXox8ApaQYQUQb
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0409 0x04b0
InternalName: Krudttnde3
FileVersion: 1.00
CompanyName: AOL
ProductName: Bratstvo
ProductVersion: 1.00
OriginalFilename: Krudttnde3.exe

TrojanDownloader:O97M/Obfuse.TB!MTB also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware2
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Midie.75765
CAT-QuickHeal Trojan.Multi
Qihoo-360 Generic/HEUR/QVM03.0.6947.Malware.Gen
ALYac Gen:Variant.Midie.75765
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
K7AntiVirus Trojan ( 005706fc1 )
BitDefender Gen:Variant.Midie.75765
K7GW Trojan ( 005706fc1 )
TrendMicro Trojan.Win32.POWLOAD.THJOGBO
Cyren W32/Bulz.F.gen!Eldorado
Symantec Ransom.Wannacry
APEX Malicious
Avast Win32:InjectorX-gen [Trj]
Kaspersky Trojan.Win32.Vebzenpak.aawd
Alibaba Trojan:Win32/Vebzenpak.98b1294a
NANO-Antivirus Trojan.Win32.Vebzenpak.hyzxpq
Ad-Aware Gen:Variant.Midie.75765
Emsisoft Gen:Variant.Midie.75765 (B)
Comodo Malware@#3m3nawcamh2hf
F-Secure Trojan.TR/AD.VBCryptor.arobp
Invincea Mal/Generic-S
McAfee-GW-Edition PWS-FCQZ!7BABD6F78DC0
Sophos Mal/Generic-S
Ikarus Trojan.VB.Crypt
Webroot W32.Malware.Gen
Avira TR/AD.VBCryptor.arobp
MAX malware (ai score=89)
Microsoft TrojanDownloader:O97M/Obfuse.TB!MTB
Arcabit Trojan.Midie.D127F5
ZoneAlarm Trojan.Win32.Vebzenpak.aawd
GData Gen:Variant.Midie.75765
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Injector.R352832
Malwarebytes Trojan.VBCrypt
Panda Trj/GdSda.A
ESET-NOD32 a variant of Win32/Injector.ENNP
TrendMicro-HouseCall Trojan.Win32.POWLOAD.THJOGBO
Rising Trojan.Injector!8.C4 (TFE:5:Lt2GaF1ASTD)
Yandex Trojan.Igent.bUzW3M.2
SentinelOne DFI – Malicious PE
eGambit Unsafe.AI_Score_77%
Fortinet W32/ENNP!tr
BitDefenderTheta Gen:NN.ZevbaCO.34298.em0@ama9K8ji
AVG Win32:InjectorX-gen [Trj]
CrowdStrike win/malicious_confidence_90% (W)

How to remove TrojanDownloader:O97M/Obfuse.TB!MTB 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

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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 TrojanDownloader:O97M/Obfuse.TB!MTB 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 TrojanDownloader:O97M/Obfuse.TB!MTB you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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