Ransom.Medusa

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.

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.

Ransom.Medusa

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.

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: 97F2BE46md5: 19ddac9782acd73f66c5fe040e86ddeename: tmp617t86edsha1: 24ceba1e2951cde8e41939da21c6ba3030fc531dsha256: dde3c98b6a370fb8d1785f3134a76cb465cd663db20dffe011da57a4de37aa95sha512: e7be7472241fdd26db48dbd0311afe821905f6d59dfb56e3dc035944b7346b0767a8af76d110c5f60c0ba0183ca3791e56d9b3c8b9ba887afa111aafc949c1d4ssdeep: 12288:vN3K5e8nbwFigzk6VVMqX8aQNRMcauV9B/rtiPnA40Q8:hCXbwFigzkQVdXvlcayDh49type: PE32 executable (GUI) Intel 80386, for MS Windows
Version Info:
0: [No Data]

Ransom.Medusa also known as:

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

Run the setup file.

Press “Install” button.

Once installed, Anti-Malware will automatically run.

Wait for the Anti-Malware scan to complete.

Click on “Clean Now”.

Are Your Protected?

If the guide doesn’t help you to remove Ransom.Medusa you can always ask me in the comments for getting help.

1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server