What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Spectating the Trojan.MSIL.Crypt.hyaa malware detection usually means that your system is in big danger. This computer virus can correctly be identified as ransomware – sort of malware which encrypts your files and forces you to pay for their decryption. Stopping it requires some peculiar steps that must be taken as soon as possible.
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Trojan.MSIL.Crypt.hyaa detection is a virus detection you can spectate in your computer. It often shows up after the provoking procedures on your computer – opening the untrustworthy e-mail messages, clicking the banner in the Internet or mounting the program from suspicious sources. From the second it shows up, you have a short time to do something about it until it starts its destructive activity. And be sure – it is much better not to wait for these harmful effects.

What is Trojan.MSIL.Crypt.hyaa virus?

Trojan.MSIL.Crypt.hyaa is ransomware-type malware. It looks for the documents on your disk drives, encrypts it, and then asks you to pay the ransom for getting the decryption key. Besides making your files inaccessible, this virus also does a lot of damage to your system. It alters the networking setups in order to stop you from looking for the elimination guides or downloading the anti-malware program. Sometimes, Trojan.MSIL.Crypt.hyaa can also block the setup of anti-malware programs.

Trojan.MSIL.Crypt.hyaa Summary

In total, Trojan.MSIL.Crypt.hyaa malware activities in the infected PC are next:

  • SetUnhandledExceptionFilter detected (possible anti-debug);
  • Behavioural detection: Executable code extraction – unpacking;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Creates RWX memory;
  • NtSetInformationThread: attempt to hide thread from debugger;
  • Anomalous file deletion behavior detected (10+);
  • Dynamic (imported) function loading detected;
  • Enumerates the modules from a process (may be used to locate base addresses in process injection);
  • Reads data out of its own binary image;
  • A process created a hidden window;
  • CAPE extracted potentially suspicious content;
  • Drops a binary and executes it;
  • Authenticode signature is invalid;
  • Uses Windows utilities for basic functionality;
  • Uses Windows utilities for basic functionality;
  • Queries information on disks, possibly for anti-virtualization;
  • Uses IOCTL_SCSI_PASS_THROUGH control codes to manipulate drive/MBR which may be indicative of a bootkit;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Harvests cookies for information gathering;
  • Ciphering the files located on the target’s drives — so the victim cannot open these documents;
  • Blocking the launching of .exe files of anti-malware programs
  • Blocking the launching of installation files of security tools

Ransomware has been a major problem for the last 4 years. It is hard to picture a more dangerous virus for both individual users and corporations. The algorithms used in Trojan.MSIL.Crypt.hyaa (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have more time than our galaxy actually exists, and possibly will exist. However, that malware does not do all these horrible things without delay – it can require up to several hours to cipher all of your files. Thus, seeing the Trojan.MSIL.Crypt.hyaa detection is a clear signal that you should begin the elimination procedure.

Where did I get the Trojan.MSIL.Crypt.hyaa?

Common methods of Trojan.MSIL.Crypt.hyaa distribution are usual for all other ransomware variants. Those are one-day landing websites where victims are offered to download the free program, so-called bait e-mails and hacktools. Bait e-mails are a relatively new method in malware distribution – you receive the e-mail that mimics some standard notifications about deliveries or bank service conditions changes. Inside of the e-mail, there is a malicious MS Office file, or a link which leads to the exploit landing page.

Malicious email spam

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

Avoiding it looks pretty simple, however, still requires tons of awareness. Malware can hide in various places, and it is far better to prevent it even before it invades your system than to depend on an anti-malware program. Simple cybersecurity knowledge is just an essential thing in the modern-day world, even if your interaction with a computer remains on YouTube videos. That can keep you a lot of money and time which you would certainly spend while looking for a fixing guide.

Trojan.MSIL.Crypt.hyaa malware technical details

File Info:

name: 0E72FFDFFEF4B97D11C9.mlw
path: /opt/CAPEv2/storage/binaries/3004d0cdc8129fb9d8dfee2e0cb4319cb8f233babb8a5a84c47c24410c42f496
crc32: 248A97A1
md5: 0e72ffdffef4b97d11c9583c6ba617c4
sha1: 3e68092ad329f124b6089627697fb7611fd53bd2
sha256: 3004d0cdc8129fb9d8dfee2e0cb4319cb8f233babb8a5a84c47c24410c42f496
sha512: e3409a0a9a49881df1f5061bd6fe5d49ffbe05d1b37514716f5fe706cb03ea912f170cf0a7b7a2ebe0ba20f07fe7209c6c8a207e4faaa3e2425fbdbfc4b92e1a
ssdeep: 196608:H6zhl8sq/AH7F8rfSyIMAy1sOh03vGJOQrD:H6zP8sz67SA7TJO8D
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T14B6633EF246881B7D45D70F95069AEB29A387F561226C853CB41FFCA4A39127CBD831C
sha3_384: 0b9a18f16028381bf5a7daa3989ab943bfc8449cef12cab3bc24e88936147658909c43d510ab404719f91d6ca1a223d8
ep_bytes: 558bec6aff68983742006858fa410064
timestamp: 2013-11-07 11:09:18

Version Info:

FileVersion: 2, 0, 0, 44
ProductName: Instalação do Meu Produto
ProductVersion: 2, 0, 0, 44
Translation: 0x0409 0x04b0

Trojan.MSIL.Crypt.hyaa also known as:

Elasticmalicious (moderate confidence)
K7AntiVirusTrojan ( 0056e5201 )
K7GWTrojan ( 0056e5201 )
CrowdStrikewin/malicious_confidence_100% (W)
ESET-NOD32multiple detections
EmsisoftTrojan.GenericKD.48519089 (B)
CynetMalicious (score: 99)
MAXmalware (ai score=86)
RisingTrojan.Undefined!8.1327C (CLOUD)

How to remove Trojan.MSIL.Crypt.hyaa?

Trojan.MSIL.Crypt.hyaa malware is very hard to remove by hand. It puts its files in a variety of places throughout the disk, and can get back itself from one of the elements. Furthermore, various changes in the registry, networking settings and Group Policies are really hard to locate and return to the initial. It is far better to use a specific app – exactly, an anti-malware program. GridinSoft Anti-Malware will fit the best for malware removal reasons.

Why GridinSoft Anti-Malware? It is really lightweight and has its databases updated just about every hour. Moreover, it does not have such bugs and exposures as Microsoft Defender does. The combination of these details makes GridinSoft Anti-Malware perfect for taking out malware of any kind.

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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