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

What is TrojanDropper:Win32/Vigorf.A infection?

In this post you will certainly find concerning the meaning of TrojanDropper:Win32/Vigorf.A as well as its negative impact on your computer. Such ransomware are a kind of malware that is specified by online scams to require paying the ransom money by a sufferer.

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In the majority of the instances, TrojanDropper:Win32/Vigorf.A ransomware will instruct its targets to initiate funds move for the function of counteracting the changes that the Trojan infection has presented to the sufferer’s tool.

TrojanDropper:Win32/Vigorf.A Summary

These modifications can be as follows:

  • Executable code extraction;
  • Attempts to connect to a dead IP:Port (1 unique times);
  • Presents an Authenticode digital signature;
  • Creates RWX memory;
  • Possible date expiration check, exits too soon after checking local time;
  • Reads data out of its own binary image;
  • Drops a binary and executes it;
  • Attempts to modify proxy settings;
  • Ciphering the records located on the sufferer’s disk drive — so the victim can no more utilize the information;
  • Preventing regular accessibility to the sufferer’s workstation;

Related domains:



The most common channels whereby TrojanDropper:Win32/Vigorf.A Trojans are infused are:

  • By means of phishing emails;
  • As an effect of individual winding up on a resource that organizes a destructive software;

As quickly as the Trojan is effectively injected, it will either cipher the information on the target’s computer or stop the tool from operating in an appropriate fashion – while additionally putting a ransom money note that points out the requirement for the victims to impact the settlement for the objective of decrypting the documents or restoring the data system back to the first problem. In the majority of instances, the ransom note will turn up when the customer reboots the PC after the system has already been damaged.

TrojanDropper:Win32/Vigorf.A circulation channels.

In numerous corners of the world, TrojanDropper:Win32/Vigorf.A expands by leaps as well as bounds. However, the ransom notes and also techniques of obtaining the ransom quantity may vary depending upon certain neighborhood (regional) setups. The ransom money notes and also methods of obtaining the ransom money amount might differ depending on particular local (local) setups.

Ransomware injection

As an example:

    Faulty signals about unlicensed software program.

    In certain areas, the Trojans often wrongfully report having actually spotted some unlicensed applications enabled on the sufferer’s tool. The alert then demands the individual to pay the ransom money.

    Faulty statements regarding prohibited content.

    In nations where software piracy is much less preferred, this technique is not as efficient for the cyber frauds. Alternatively, the TrojanDropper:Win32/Vigorf.A popup alert may wrongly declare to be deriving from a police institution and will certainly report having situated youngster porn or other illegal data on the device.

    TrojanDropper:Win32/Vigorf.A popup alert might wrongly claim to be obtaining from a regulation enforcement institution as well as will certainly report having located kid pornography or other unlawful information on the tool. The alert will in a similar way have a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 7B5C6C5C
md5: 173750ad44804e0c8bca174703a04cd7
name: 173750AD44804E0C8BCA174703A04CD7.mlw
sha1: ee9f0d9a53bed92c1972412c252f65036489a80c
sha256: 1a701daa258d50a369507fca24a5a6d0bef78087f4cd274b5df8988357519bae
sha512: 82e79ff437c31eca1f54713c7cfcf9ca3b7202749543cd4c114719c1355a53890325819f314c3d1e6a86518ee986d9ebddcd583a1e954dce373f667421773c17
ssdeep: 24576:O4nXu/QSDTV+Bnvu8tj/qKpXyeCc1cipzurU1kfg6qiZQT+ilhcOfD7UBdVHOHRF:OqeNVcO5iBNsiiZQCu9f0BTHgXhfSUbx
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

CompanyName: vkx43enatktx435_DJ
Comments: This installation was built with Inno Setup.
ProductName: x412x43aox43dx442ax43ax442ex414x438x434x436ex439
ProductVersion: 1.00075153
FileDescription: x412x43aox43dx442ax43ax442ex414x438x434x436ex439 Setup
Translation: 0x0000 0x04b0

TrojanDropper:Win32/Vigorf.A also known as:

K7AntiVirusAdware ( 00570af31 )
CynetMalicious (score: 99)
CrowdStrikewin/malicious_confidence_100% (D)
K7GWAdware ( 00570af31 )
ESET-NOD32a variant of Win32/Yandex.K potentially unwanted
EmsisoftGen:Variant.Midie.84157 (B)
MAXmalware (ai score=89)

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