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

What is Ransom.Medusa infection?

In this post you will certainly discover concerning the interpretation of Ransom.Medusa and also its unfavorable impact on your computer system. Such ransomware are a type of malware that is elaborated by on-line frauds to require 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.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

Most of the cases, Ransom.Medusa virus will certainly advise its targets to start funds transfer for the objective of counteracting the modifications that the Trojan infection has introduced to the sufferer’s tool.

Ransom.Medusa Summary

These alterations can be as follows:

  • Attempts to connect to a dead IP:Port (1 unique times);
  • 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.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • A process created a hidden window;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Uses Windows utilities for basic functionality;
  • Attempts to delete volume shadow copies;
  • Attempts to stop active services;
  • 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!
  • Modifies boot configuration settings;
  • Installs itself for autorun at Windows startup.

    There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Clears Windows events or logs;
  • Creates a copy of itself;
  • Attempts to disable UAC.

    User Account Control or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on PC.

    UAC includes several technologies 1:

    • File and egistry Virtualization;
    • Same-desktop Elevation;
    • Filtered Token;
    • User Interface Privilege Isolation;
    • Protected Mode Internet Explorer;
    • Installer Detection;
  • Attempts to modify UAC prompt behavior;
  • Generates some ICMP traffic;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the records found on the target’s hard disk — so the sufferer can no longer utilize the data. This is the typical behavior of malware known as ransomware that encrypts a victim’s files. The cybercriminal then demands a ransom from the victim to restore access to the data upon payment.
  • Preventing normal accessibility to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


One of the most typical networks where Ransom.Medusa Ransomware is infused are:

  • By means of phishing emails;
  • As a consequence of customer ending up on a source that organizes a harmful software program;

As soon as the Trojan is effectively infused, it will certainly either cipher the information on the victim’s computer or avoid the gadget from functioning in an appropriate manner – while additionally putting a ransom note that states the need for the targets to impact the payment for the objective of decrypting the papers or bring back the data system back to the preliminary condition. In the majority of circumstances, the ransom note will certainly turn up when the customer reboots the COMPUTER after the system has actually currently been harmed.

Ransom.Medusa circulation networks.

In numerous edges of the world, Ransom.Medusa grows by leaps and bounds. Nevertheless, the ransom notes and also methods of extorting the ransom quantity may vary depending on particular regional (regional) settings. The ransom notes, as well as tricks of extorting the ransom money quantity, may vary depending on particular neighborhood (regional) setups.

Ransomware injection

For example:

    Faulty informs regarding unlicensed software program.

    In specific locations, the Trojans typically wrongfully report having discovered some unlicensed applications allowed on the victim’s tool. The sharp then requires the individual to pay the ransom.

    Faulty declarations regarding unlawful web content.

    In countries where software program piracy is less preferred, this approach is not as effective for cyber frauds. Alternatively, the Ransom.Medusa popup alert may wrongly assert to be stemming from a law enforcement institution as well as will certainly report having located kid porn or various other unlawful data on the tool.

    Ransom.Medusa popup alert might falsely declare to be acquiring from a legislation enforcement establishment and also will report having located kid porn or various other unlawful data on the tool. The alert will in a similar way have a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 97F2BE46
md5: 19ddac9782acd73f66c5fe040e86ddee
name: tmp617t86ed
sha1: 24ceba1e2951cde8e41939da21c6ba3030fc531d
sha256: dde3c98b6a370fb8d1785f3134a76cb465cd663db20dffe011da57a4de37aa95
sha512: e7be7472241fdd26db48dbd0311afe821905f6d59dfb56e3dc035944b7346b0767a8af76d110c5f60c0ba0183ca3791e56d9b3c8b9ba887afa111aafc949c1d4
ssdeep: 12288:vN3K5e8nbwFigzk6VVMqX8aQNRMcauV9B/rtiPnA40Q8:hCXbwFigzkQVdXvlcayDh49
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Ransom.Medusa also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malwareA
DrWeb Trojan.DownLoader30.27698
MicroWorld-eScan Trojan.GenericKD.41897391
FireEye Generic.mg.19ddac9782acd73f
CAT-QuickHeal Ransom.Medusa.S13913779
McAfee Ransomware-GRC!19DDAC9782AC
Malwarebytes Ransom.Medusa
Zillya Trojan.Filecoder.Win32.10593
Sangfor Malware
K7AntiVirus Trojan ( 0055936b1 )
Alibaba Trojan:Win32/DelShad.b0dd11e0
K7GW Trojan ( 0055936b1 )
Cybereason malicious.e2951c
Invincea heuristic
BitDefenderTheta Gen:NN.ZexaF.34128.PuW@a0ApMFmi
Symantec Trojan.Gen.2
ESET-NOD32 a variant of Win32/Filecoder.MedusaLocker.C
APEX Malicious
Paloalto generic.ml
Kaspersky Trojan-Ransom.Win32.Medusa.a
BitDefender Trojan.GenericKD.41897391
NANO-Antivirus Trojan.Win32.DelShad.gdgfzg
Avast Win32:Malware-gen
Tencent Malware.Win32.Gencirc.10b88231
TACHYON Ransom/W32.MedusaLocker.676864
Sophos Mal/Ransom-FX
Comodo Malware@#1wd2g85h9bo7y
F-Secure Heuristic.HEUR/AGEN.1123940
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom.Win32.MEDUSALOCKER.A
McAfee-GW-Edition BehavesLike.Win32.BrowseFox.jh
Emsisoft Trojan.FileCoder (A)
Ikarus Trojan-Ransom.Medusalocker
Jiangmin Trojan.DelShad.if
Webroot W32.Ransom.Gen
Avira HEUR/AGEN.1123940
Antiy-AVL Trojan/Win32.DelShad
Microsoft Ransom:Win32/Ako!MSR
Arcabit Trojan.Generic.D27F4DAF
AegisLab Trojan.Win32.Medusa.tqU6
ZoneAlarm Trojan-Ransom.Win32.Medusa.a
GData Win32.Trojan-Ransom.Filecoder.BO
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.FileCoder.R295566
ALYac Trojan.Ransom.Filecoder
MAX malware (ai score=100)
VBA32 Trojan.DelShad
Cylance Unsafe
TrendMicro-HouseCall Ransom.Win32.MEDUSALOCKER.A
Rising Ransom.Medusa!1.BE63 (CLOUD)
Yandex Trojan.DelShad!
MaxSecure Trojan.Malware.74630872.susgen
Fortinet W32/Filecoder.NYA!tr.ransom
Ad-Aware Trojan.GenericKD.41897391
AVG Win32:Malware-gen
Panda Trj/GdSda.A
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 Win32/Trojan.369

How to remove Ransom.Medusa virus?

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 GridinSoft2

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.3.

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 Ransom.Medusa files and other malicious programs. This process can take 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 the 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 Ransom.Medusa you can always ask me in the comments for getting help.

User Review
0 (0 votes)
Comments Rating 0 (0 reviews)


  1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server
  2. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  3. 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.

Leave a Reply