What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Spectating the Ransom:Win32/MegaCortex.A detection usually means that your system is in big danger. This virus can correctly be named as ransomware – type of malware which encrypts your files and forces you to pay for their decryption. Stopping it requires some unusual steps that must be done as soon as possible.
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Ransom:Win32/MegaCortex.A detection is a malware detection you can spectate in your system. It often appears after the provoking actions on your PC – opening the dubious email messages, clicking the advertisement in the Internet or setting up the program from unreliable resources. From the moment it shows up, you have a short time to act before it begins its harmful activity. And be sure – it is better not to wait for these malicious actions.

What is Ransom:Win32/MegaCortex.A virus?

Ransom:Win32/MegaCortex.A is ransomware-type malware. It searches for the files on your disk drive, ciphers it, and then asks you to pay the ransom for getting the decryption key. Besides making your files inaccessible, this malware also does a lot of damage to your system. It modifies the networking setups in order to avoid you from reading the removal guides or downloading the antivirus. In some cases, Ransom:Win32/MegaCortex.A can also prevent the setup of anti-malware programs.

Ransom:Win32/MegaCortex.A Summary

In total, Ransom:Win32/MegaCortex.A virus actions in the infected computer are next:

  • SetUnhandledExceptionFilter detected (possible anti-debug);
  • Sample contains Overlay data;
  • Dynamic (imported) function loading detected;
  • The binary likely contains encrypted or compressed data.;
  • Authenticode signature is invalid;
  • Anomalous binary characteristics;
  • Ciphering the files located on the target’s disk drives — so the victim cannot check these documents;
  • Blocking the launching of .exe files of security tools
  • Blocking the launching of installation files of anti-malware programs

Ransomware has actually been a horror story for the last 4 years. It is challenging to imagine a more dangerous virus for both individuals and businesses. The algorithms used in Ransom:Win32/MegaCortex.A (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need more time than our galaxy currently exists, and possibly will exist. But that virus does not do all these unpleasant things immediately – it can require up to several hours to cipher all of your files. Thus, seeing the Ransom:Win32/MegaCortex.A detection is a clear signal that you must start the removal process.

Where did I get the Ransom:Win32/MegaCortex.A?

Typical methods of Ransom:Win32/MegaCortex.A distribution are common for all other ransomware variants. Those are one-day landing sites where victims are offered to download the free software, so-called bait emails and hacktools. Bait e-mails are a quite modern strategy in malware distribution – you get the e-mail that simulates some normal notifications about shipments or bank service conditions shifts. Within the e-mail, there is a corrupted MS Office file, or a web link which opens the exploit landing page.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Avoiding it looks quite simple, but still needs a lot of attention. Malware can hide in various places, and it is better to stop it even before it invades your system than to depend on an anti-malware program. Basic cybersecurity knowledge is just an essential item in the modern-day world, even if your interaction with a computer remains on YouTube videos. That may keep you a lot of money and time which you would spend while searching for a fix guide.

Ransom:Win32/MegaCortex.A malware technical details

File Info:

name: FD3EBC8DC312C876FF04.mlw
path: /opt/CAPEv2/storage/binaries/d207a80adb5311737b6d541122aeda0a13f0353334b836af3412340d3730c9eb
crc32: B0868B97
md5: fd3ebc8dc312c876ff048502e79ff8b0
sha1: 39169cb10fffe6b8a599f2d43e64254bd7648cf9
sha256: d207a80adb5311737b6d541122aeda0a13f0353334b836af3412340d3730c9eb
sha512: 059f17edace98bc6f0cd4ca70fd705be571c843846bddfd35320f852c2ba78f04ac3e6a90c4d44fa81d3174d1653622e8d212b0ee0f344f6b8e8f2ceb26df617
ssdeep: 24576:QF78RE7pJSKBUUoyusymwzLAPbUxpKZrLDF2w:s4y7+C3uIwoPbqurLn
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1E81501017580C132E5F20832557CEBAB893D7D341B755EDBA7E41E2ACE740D2AB32E66
sha3_384: b24c8c2a33825892c78763943d33fcc926b80d5e08bf4dc9992ebc01bfe22e5dbe82ce2beb68533be20c7fce171cdc7c
ep_bytes: e8f2070000e97afeffffcccccccccccc
timestamp: 2019-04-25 21:08:38

Version Info:

0: [No Data]

Ransom:Win32/MegaCortex.A also known as:

K7AntiVirusRiskware ( 0040eff71 )
K7GWRiskware ( 0040eff71 )
Elasticmalicious (high confidence)
AvastWin32:RansomX-gen [Ransom]
EmsisoftTrojan.Ransom.CBH (B)
SentinelOneStatic AI – Suspicious PE
MAXmalware (ai score=84)
CynetMalicious (score: 99)
RisingRansom.MegaCortex!1.B5BB (CLASSIC)
AVGWin32:RansomX-gen [Ransom]

How to remove Ransom:Win32/MegaCortex.A?

Ransom:Win32/MegaCortex.A malware is very difficult to delete by hand. It puts its files in several locations throughout the disk, and can recover itself from one of the parts. Moreover, a lot of alterations in the windows registry, networking settings and Group Policies are fairly hard to find and change to the initial. It is better to use a specific tool – exactly, an anti-malware tool. GridinSoft Anti-Malware will definitely fit the best for virus removal objectives.

Why GridinSoft Anti-Malware? It is very lightweight and has its databases updated just about every hour. Additionally, it does not have such bugs and exposures as Microsoft Defender does. The combination of these aspects makes GridinSoft Anti-Malware perfect for getting rid of malware of any type.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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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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