How to remove MedusaHTTP malware?

Also Known As: MedusaHTTP botnet malware
Type: Trojan
Distribution: Low
Damage level: Severe

MedusaHTTP virus removal guide

What is MedusaHTTP?

MedusaHTTP is the name of a malicious software that was recently discovered by Brad Duncan. It is a HTTP-based, DDoS botnet malware which is written using the .NET framework. Cyber criminals use MedusaHTTP to perform DDoS (Denial-of-service) attacks against websites. It is known that MedusaHTTP is used to attack casino domains, however, cyber criminals may be using to attack pages of other kind too.

MedusaHTTP malware

Computers that are infected with MedusaHTTP malware are called bots, and a group of bots/infected computers is called a botnet. Established botnets can be controlled remotely and allow cyber criminals to perform DDoS attacks against various domains. Typically, cyber criminals perform DDoS attacks with a purpose to make networks (and/or machines) unavailable for other users. They use botnet to attack a particular website/domain, in other words, to create an incoming traffic flood which makes the attacked website unavailable. Simply said, targeted domain becomes temporarily impossible to access. The more bots are in the botnet, the more difficult is to stop the attack. In other words, it is impossible to stop the DDoS attack by blocking a single source (bot). Such attacks can cause businesses a variety of problems: potential or existing customers could not access websites, make purchases, get information about the products or services and so on. Typically, people who have their computers added to botnets are unaware of that. In other words, they unintentionally become a part of DDoS attacks that are illegal. If there is a reason to believe that a computer is infected with MedusaHTTP, it should be removed as soon as possible.

Threat Summary:
Name MedusaHTTP botnet malware
Threat Type Botnet malware
Detection Names (GOOGLE AUTO UPDATER.EXE) Avast (Win32:Malware-gen), BitDefender (Trojan.GenericKD.41566880), ESET-NOD32 (A Variant Of Win32/Kryptik.GVLL), McAfee (Artemis!C0042704490C), Full List (VirusTotal)
Malicious Process Name(s) Influences Diskview Leukemia
Symptoms Malware designed to stealthily infiltrate victim's computer and remain silent thus no particular symptoms are clearly visible on an infected machine.
Distribution methods RIG Exploit Kit Infected email attachments, malicious online advertisements, social engineering, software cracks.
Damage Victim's computer added to a botnet and used to perform DDoS attacks against various domains.
Removal

To eliminate MedusaHTTP botnet malware our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

MedusaHTTP is not the only program that can be used to perform DDoS attacks, other examples are Godlua, GoBotKR and Megumin. Most of the times users of infected machines do not know that there is a malicious program of this type installed on their systems. It is known that if installed, MedusaHTTP runs a process in Task Manager called "Influences Diskview Leukemia".

How did MedusaHTTP infiltrate my computer?

Research shows that cyber criminals distribute MedusaHTTP through the Rig EK (Exploit Kit). One of the examples is the executable file named "Google Auto Updater.exe". They achieve it by injecting malicious scripts into various websites which, when visited, search for system vulnerabilities and install/inject malware by exploiting detected vulnerabilities. However, malware can be distributed using other ways too: via spam campaigns, fake software updating tools, unreliable software download channels, software 'cracking' tools and trojans. To spread malware through spam campaigns, cyber criminals try to trick people into opening attachments that they attach to emails that they send to a lot of people. Examples of files that they usually attach are Microsoft Office documents, PDFs, archive files like ZIP, RAR, JavaScript or executable (.exe and other) files. When opened, they download and install malicious software. Unofficial software updating tools spread malware by installing it instead of updates, fixes. Thes tools can be used to exploit outdated software's flaws, bugs too. Unreliable software download sources such as torrent clients, eMule (and other Peer-to-Peer networks), free file hosting websites, freeware download pages, unofficial pages and other channels of this kind are often used to spread malicious software too. People infect their computers when they open files that are downloaded from these sources. Typically, malicious files are disguised as legitimate. Software 'cracking' tools, if used, can download and install malware instead of illegally activating software. Trojans, if installed, usually are designed to cause chain infections - they spread (install) other malicious programs.

How to avoid installation of malware?

We recommend to be careful with irrelevant emails that contain attachments and web links, especially if they are sent from suspicious (unknown) addresses. It is not safe to open files that are included in emails of this kind. Furthermore, software should be downloaded and updated using official websites and/or tools, functions that are provided by official software developers. Unofficial pages or download tools cannot be trusted. Installed software should not be activated using some 'cracking' tools. It is never legal to use them and these tools often cause computer infections (downloads and installations of malware). One more way to protect a computer is to regularly scan it with a reputable anti-virus or anti-spyware suite and remove detected threats on time. If you believe that your computer is already infected, we recommend running a scan with Spyhunter for Windows to automatically eliminate infiltrated malware.

Malicious MedusaHTTP process in Task Manager ("Influences Diskview Leukemia"):

Influences Diskview Leukemia MedusaHTTP malicious process

Instant automatic removal of MedusaHTTP botnet malware: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of MedusaHTTP botnet malware. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

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How to remove malware manually?

Manual malware removal is a complicated task, usually it's better to let antivirus or anti-malware programs do it automatically. To remove this malware we recommend using  Spyhunter for Windows. If you wish to remove malware manually, the first step is to identify the name of the malware that you are trying to remove. Here's an example of a suspicious program running on user's computer:

malicious process running on user's computer sample

If you checked the list of programs running on your computer, for example using task manager and identified a program that looks suspicious you should continue with these steps:

manual malware removal step 1 Download a program called Autoruns. This program shows auto-start applications, Registry and file system locations:

screenshot of autoruns application

manual malware removal step 2Restart your computer into Safe Mode:

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

 

manual malware removal step 3Extract the downloaded archive and run Autoruns.exe file.

extract autoruns.zip and run autoruns.exe

manual malware removal step 4In the Autoruns application click "Options" at the top and uncheck "Hide Empty Locations" and "Hide Windows Entries" options. After this procedure click the "Refresh" icon.

Click 'Options' at the top and uncheck 'Hide Empty Locations' and 'Hide Windows Entries' options

manual malware removal step 5Check the list provided by Autoruns application and locate the malware file that you want to eliminate.

You should write down it full path and name. Note that some malware hides their process names under legitimate Windows process names. At this stage it's very important to avoid removing system files. After you locate he suspicious program you want to remove right click your mouse over it's name and choose "Delete"

locate the malware file you want to remove

After removing the malware through Autoruns application (this ensures that the malware won't run automatically on the next system startup) you should search for the malware name on your computer. Be sure to enable hidden files and folders before proceeding. If you find the file of the malware be sure to remove it.

searching for malware file on your computer

Reboot your computer in normal mode. Following these steps should help remove any malware from your computer. Note that manual threat removal requires advanced computer skills, it's recommended to leave malware removal to antivirus and anti-malware programs. These steps might not work with advanced malware infections. As always it's better to avoid getting infected that try to remove malware afterwards. To keep your computer safe be sure to install latest operating system updates and use antivirus software.

To be sure your computer is free of malware infections we recommend scanning it with Spyhunter for Windows.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global virus and spyware activity level today:

Medium threat activity
Medium

Increased attack rate of infections detected within the last 24 hours.

QR Code
MedusaHTTP botnet malware QR code
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Platform: Windows

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