Written by Robert Bailey

What is TrojanDownloader:O97M/Obfuse.YA!rfn infection?

In this post you will locate regarding the meaning of TrojanDownloader:O97M/Obfuse.YA!rfn and also its adverse effect on your computer. Such ransomware are a kind of malware that is specified by on the internet scams to demand paying the ransom by a victim.

GridinSoft Anti-Malware Review

It is better to prevent, than repair and repent!

When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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In the majority of the cases, TrojanDownloader:O97M/Obfuse.YA!rfn infection will instruct its targets to start funds move for the objective of counteracting the amendments that the Trojan infection has actually introduced to the target’s device.

TrojanDownloader:O97M/Obfuse.YA!rfn Summary

These modifications can be as follows:

  • Network activity detected but not expressed in API logs;
  • Anomalous binary characteristics;
  • Ciphering the records situated on the target’s disk drive — so the sufferer can no longer use the data;
  • Preventing routine accessibility to the victim’s workstation;

Related domains: Ransom:Win32/Blocker.29bf28a1 Ransom:Win32/Blocker.29bf28a1


One of the most typical networks through which TrojanDownloader:O97M/Obfuse.YA!rfn Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As an effect of customer ending up on a source that hosts a harmful software;

As quickly as the Trojan is successfully injected, it will certainly either cipher the information on the victim’s PC or avoid the tool from operating in a correct way – while likewise putting a ransom note that points out the requirement for the sufferers to effect the repayment for the function of decrypting the documents or bring back the documents system back to the first problem. In most instances, the ransom money note will certainly turn up when the customer reboots the COMPUTER after the system has currently been harmed.

TrojanDownloader:O97M/Obfuse.YA!rfn distribution channels.

In different corners of the world, TrojanDownloader:O97M/Obfuse.YA!rfn expands by jumps and also bounds. Nonetheless, the ransom notes as well as techniques of obtaining the ransom quantity might differ depending on specific neighborhood (local) setups. The ransom notes as well as tricks of obtaining the ransom money amount may vary depending on certain neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software program.

    In specific locations, the Trojans typically wrongfully report having actually spotted some unlicensed applications enabled on the sufferer’s tool. The alert then demands the customer to pay the ransom.

    Faulty declarations regarding unlawful material.

    In nations where software piracy is much less preferred, this technique is not as reliable for the cyber scams. Conversely, the TrojanDownloader:O97M/Obfuse.YA!rfn popup alert may falsely assert to be deriving from a law enforcement institution as well as will report having located youngster porn or various other prohibited information on the tool.

    TrojanDownloader:O97M/Obfuse.YA!rfn popup alert might incorrectly assert to be obtaining from a law enforcement organization and will report having situated kid porn or various other unlawful data on the device. The alert will in a similar way consist of a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 14BC372D
md5: 407d55c33635be29d79f40f804786c54
name: 407D55C33635BE29D79F40F804786C54.mlw
sha1: c3144569e6572c7adc90a7df43024bdfe505e107
sha256: 66c60d0607831ef258f4f79e4b4c7da1b8a512ff3bb3c1f337cfd08d24432695
sha512: be70a4b6565dce8b053693ec4d750271899324ea35a181114b1beaca052155fd7abea2d619d090d9eb4e66150e1ecf4b0a57c2b66cf266488136d762d26d3f19
ssdeep: 192:vEoAFrRLGbNqtp+sv1xqN0QqPKNlS0jh7KRtU5uWXju3tRQJ5Pg0fW0mBYRkr:vG9OspBPKNdlmRtU5uWXju3q5PnfpmB
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2017
Assembly Version:
InternalName: Windows Proces.exe
ProductName: Windows Proces
FileDescription: Windows Proces
OriginalFilename: Windows Proces.exe

TrojanDownloader:O97M/Obfuse.YA!rfn also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Riskware ( 0040eff71 )
Lionic Trojan.Win32.Blocker.j!c
ALYac Trojan.GenericKD.4992337
Cylance Unsafe
Alibaba Ransom:Win32/Blocker.29bf28a1
K7GW Riskware ( 0040eff71 )
Cybereason malicious.33635b
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Spy.Keylogger.CBS
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.jzrk
BitDefender Trojan.GenericKD.4992337
NANO-Antivirus Trojan.Win32.Blocker.eodspd
MicroWorld-eScan Trojan.GenericKD.4992337
Tencent Win32.Trojan.Blocker.Palx
Ad-Aware Trojan.GenericKD.4992337
Sophos Mal/Generic-R + Mal/MSIL-AV
Comodo Malware@#1cnfydma3mlo3
BitDefenderTheta Gen:NN.ZemsilF.34110.am0@aC@gLFk
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Artemis!Trojan
Emsisoft Trojan.GenericKD.4992337 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Spy.Gen
eGambit Unsafe.AI_Score_80%
Microsoft TrojanDownloader:O97M/Obfuse.YA!rfn
GData Trojan.GenericKD.4992337
AhnLab-V3 Trojan/Win32.Blocker.C3442928
McAfee Artemis!407D55C33635
MAX malware (ai score=100)
Panda Trj/GdSda.A
Ikarus Trojan-Spy.Agent
Fortinet W32/Blocker.AV!tr
AVG Win32:Malware-gen

How to remove TrojanDownloader:O97M/Obfuse.YA!rfn 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

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 TrojanDownloader:O97M/Obfuse.YA!rfn 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove TrojanDownloader:O97M/Obfuse.YA!rfn 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

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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