What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Spectating the Trojan-Ransom.Win32.Cryptodef malware detection means that your system is in big danger. This computer virus can correctly be named as ransomware – sort of malware which encrypts your files and asks you to pay for their decryption. Removing it requires some peculiar steps that must be taken as soon as possible.
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Trojan-Ransom.Win32.Cryptodef detection is a virus detection you can spectate in your computer. It generally shows up after the preliminary actions on your computer – opening the untrustworthy email messages, clicking the advertisement in the Web or setting up the program from untrustworthy sources. From the moment it shows up, you have a short time to act until it begins its malicious activity. And be sure – it is much better not to wait for these malicious effects.

What is Trojan-Ransom.Win32.Cryptodef virus?

Trojan-Ransom.Win32.Cryptodef is ransomware-type malware. It searches for the documents on your disk drives, encrypts it, and then asks you to pay the ransom for receiving the decryption key. Besides making your files inaccessible, this virus additionally does a lot of damage to your system. It modifies the networking settings in order to stop you from checking out the removal guides or downloading the anti-malware program. In rare cases, Trojan-Ransom.Win32.Cryptodef can additionally block the setup of anti-malware programs.

Trojan-Ransom.Win32.Cryptodef Summary

In total, Trojan-Ransom.Win32.Cryptodef ransomware actions in the infected system 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;
  • Possible date expiration check, exits too soon after checking local time;
  • Dynamic (imported) function loading detected;
  • Reads data out of its own binary image;
  • CAPE extracted potentially suspicious content;
  • Unconventionial binary language: Chinese (Simplified);
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • The binary likely contains encrypted or compressed data.;
  • Authenticode signature is invalid;
  • Tries to unhook or modify Windows functions monitored by Cuckoo;
  • Attempted to write directly to a physical drive;
  • Ciphering the documents located on the victim’s drives — so the victim cannot check these files;
  • Blocking the launching of .exe files of anti-virus apps
  • Blocking the launching of installation files of anti-malware apps

Related domains:


Ransomware has been a headache for the last 4 years. It is difficult to realize a more hazardous virus for both individual users and businesses. The algorithms utilized in Trojan-Ransom.Win32.Cryptodef (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have a lot more time than our galaxy already exists, and possibly will exist. However, that virus does not do all these terrible things instantly – it may take up to several hours to cipher all of your files. Hence, seeing the Trojan-Ransom.Win32.Cryptodef detection is a clear signal that you should start the removal procedure.

Where did I get the Trojan-Ransom.Win32.Cryptodef?

Routine methods of Trojan-Ransom.Win32.Cryptodef distribution are basic for all other ransomware examples. Those are one-day landing web pages where victims are offered to download and install the free software, so-called bait e-mails and hacktools. Bait e-mails are a relatively new method in malware spreading – you get the email that mimics some normal notifications about shippings or bank service conditions changes. Within the email, there is a malicious MS Office file, or a link which leads to the exploit landing site.

Malicious email spam

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

Avoiding it looks pretty uncomplicated, but still needs tons of awareness. Malware can hide in various spots, and it is far better to prevent it even before it goes into your computer than to rely upon an anti-malware program. Standard cybersecurity knowledge is just an essential thing in the modern world, even if your interaction with a PC stays on YouTube videos. That can save you a great deal of money and time which you would spend while looking for a solution.

Trojan-Ransom.Win32.Cryptodef malware technical details

File Info:

name: 341950160A9858EA5E87.mlw
path: /opt/CAPEv2/storage/binaries/2d866321e96831c7d3d7c0b4e8a2215adedb28a61a017be86a52fd4c558acc61
crc32: 66921DC7
md5: 341950160a9858ea5e87cd4049f6c5c3
sha1: e6dc45151089a598a673d25b04a8e523de81b5f8
sha256: 2d866321e96831c7d3d7c0b4e8a2215adedb28a61a017be86a52fd4c558acc61
sha512: bf207edd4bef6c415667be36b398588a0ef40ea692330c164cba5fc0a0fe3a3c1092fcb700eb673829812851afe46d8f2522de3f5232c0319101e3565e0d5f0c
ssdeep: 98304:K9mTXAVqRPYqdwkLcHH7MGLd51YkPu4cJMGBj4DhDZANxBYts+:5TXA8djA7M0LNPy8DpZ+C2+
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1D4061212B6D380F3C666053119AA3B79D679FF410A20CFD79BA4FE6F2C32541E43616A
sha3_384: 51c6dd829a9fbf14f73c7062f45bdf518d3b0cbedc26f91eb063692099921724cd6b10bd07cc6778b6b47b70d7ef211d
ep_bytes: 558bec6aff6868d979006854b5470064
timestamp: 2015-01-25 17:08:06

Version Info:

FileDescription: 狩猎者安全防护
ProductName: 狩猎者安全防护
CompanyName: 繁华
LegalCopyright: 繁华 版权所有
Comments: 本程序使用易语言编写(
Translation: 0x0804 0x04b0

Trojan-Ransom.Win32.Cryptodef also known as:

Elasticmalicious (high confidence)
K7AntiVirusTrojan ( 005246d51 )
K7GWTrojan ( 005246d51 )
ESET-NOD32a variant of Win32/Packed.FlyStudio.AA potentially unwanted
SophosMal/Generic-S (PUA)
EmsisoftTrojan.GenericKD.35273701 (B)
SentinelOneStatic AI – Malicious PE
MAXmalware (ai score=88)
CynetMalicious (score: 100)

How to remove Trojan-Ransom.Win32.Cryptodef?

Trojan-Ransom.Win32.Cryptodef malware is extremely difficult to eliminate by hand. It stores its files in a variety of places throughout the disk, and can restore itself from one of the elements. Additionally, a number of alterations in the registry, networking settings and Group Policies are fairly hard to locate and return to the initial. It is far better to use a specific tool – exactly, an anti-malware program. GridinSoft Anti-Malware will definitely fit the best for virus elimination purposes.

Why GridinSoft Anti-Malware? It is very light-weight and has its detection databases updated just about every hour. Moreover, it does not have such problems and exploits as Microsoft Defender does. The combination of these details makes GridinSoft Anti-Malware perfect for eliminating 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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