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

What is PUP.Optional.FastDownloader infection?

In this article you will certainly discover concerning the interpretation of PUP.Optional.FastDownloader and its adverse influence on your computer. Such ransomware are a form of malware that is elaborated by on-line fraudulences to require paying the ransom by a sufferer.

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In the majority of the instances, PUP.Optional.FastDownloader infection will certainly instruct its sufferers to launch funds move for the purpose of neutralizing the amendments that the Trojan infection has presented to the sufferer’s gadget.

PUP.Optional.FastDownloader Summary

These modifications can be as complies with:

  • Presents an Authenticode digital signature;
  • Unconventionial binary language: Chinese (Simplified);
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files found on the victim’s hard drive — so the target can no more utilize the data;
  • Preventing routine access to the sufferer’s workstation;
Similar behavior
Related domains


One of the most normal networks where PUP.Optional.FastDownloader Ransomware Trojans are injected are:

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

As quickly as the Trojan is successfully infused, it will either cipher the information on the sufferer’s computer or protect against the tool from operating in a correct fashion – while also positioning a ransom money note that discusses the need for the victims to effect the payment for the purpose of decrypting the files or recovering the data system back to the preliminary problem. In many circumstances, the ransom money note will come up when the customer reboots the COMPUTER after the system has currently been damaged.

PUP.Optional.FastDownloader distribution channels.

In various edges of the world, PUP.Optional.FastDownloader expands by leaps and also bounds. However, the ransom notes and tricks of obtaining the ransom money quantity may vary depending on specific local (local) setups. The ransom notes as well as tricks of extorting the ransom money quantity may vary depending on specific neighborhood (local) setups.

Ransomware injection

For instance:

    Faulty notifies regarding unlicensed software application.

    In certain locations, the Trojans often wrongfully report having actually detected some unlicensed applications allowed on the victim’s device. The alert after that requires the user to pay the ransom money.

    Faulty declarations concerning illegal material.

    In nations where software program piracy is much less preferred, this technique is not as reliable for the cyber frauds. Conversely, the PUP.Optional.FastDownloader popup alert might falsely declare to be originating from a police organization and will certainly report having situated kid porn or various other unlawful information on the gadget.

    PUP.Optional.FastDownloader popup alert might falsely claim to be deriving from a regulation enforcement establishment as well as will report having located child porn or other illegal data on the device. The alert will likewise include a need for the customer to pay the ransom.

Technical details

File Info:

crc32: F9B7736B
md5: 2a16cc24ee0e65fa57479a8959d471d6
name: _____________________-v3.48__________07617132.exe
sha1: c6a45a043195dc59878dc99d9a3ae239d008ce27
sha256: 270b8ef0532ef5a915f30a74716fb5afd77322c7078ee936a2c4af02a7f8d4fc
sha512: 26468cef0cdc58f85e1477a29cb8a064564440be1458a4d4b6213866d241f303db5de817741a2cce5897b44c51b02c822bea9e6e0454c1a9576fa5e9302918ef
ssdeep: 24576:cjzSNQDy1AOM8EHpU/QqBo521H6zf6IJZWpaamE3jdvvZQdSszdn:eny1ATpGh6zfdIhF3jdvBQdSszdn
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2018
InternalName: FastDownloader.exe
CompanyName: -
ProductName: x8f6fx4ef6x4e0bx8f7dx5668
FileDescription: x8f6fx4ef6x4e0bx8f7dx5668
OriginalFilename: FastDownloader.exe
Translation: 0x0804 0x04b0

PUP.Optional.FastDownloader also known as:

K7AntiVirusRiskware ( 00544e421 )
K7GWRiskware ( 00544e421 )
AvastWin32:Adware-gen [Adw]
EmsisoftApplication.Downloader (A)
Endgamemalicious (high confidence)
MAXmalware (ai score=99)
ESET-NOD32a variant of Win32/RiskWare.Downer.A
RisingAdware.Downloader!1.BD64 (CLOUD)
AVGWin32:Adware-gen [Adw]

How to remove PUP.Optional.FastDownloader 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 PUP.Optional.FastDownloader 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 PUP.Optional.FastDownloader you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

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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