What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Seeing the Troj/Krypt-XU detection name usually means that your system is in big danger. This malware can correctly be named as ransomware – type of malware which ciphers your files and forces you to pay for their decryption. Removing it requires some specific steps that must be taken as soon as possible.
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Troj/Krypt-XU detection is a malware detection you can spectate in your system. It frequently appears after the provoking actions on your computer – opening the untrustworthy email, clicking the banner in the Web or mounting the program from dubious sources. From the second it shows up, you have a short time to do something about it before it begins its harmful action. And be sure – it is better not to await these harmful actions.

What is Troj/Krypt-XU virus?

Troj/Krypt-XU is ransomware-type malware. It looks for the documents on your disks, encrypts it, and then asks you to pay the ransom for getting the decryption key. Besides making your documents locked, 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 articles or downloading the anti-malware program. In rare cases, Troj/Krypt-XU can even prevent the launching of anti-malware programs.

Troj/Krypt-XU Summary

Summarizingly, Troj/Krypt-XU virus actions in the infected system are next:

  • Behavioural detection: Executable code extraction – unpacking;
  • HTTPS urls from behavior.;
  • CAPE extracted potentially suspicious content;
  • Unconventionial language used in binary resources: Tamil;
  • The binary likely contains encrypted or compressed data.;
  • Authenticode signature is invalid;
  • Behavioural detection: Injection (Process Hollowing);
  • Behavioural detection: Injection (inter-process);
  • Behavioural detection: Transacted Hollowing;
  • CAPE detected the STOP malware family;
  • Attempts to modify proxy settings;
  • Creates a copy of itself;
  • Creates a known STOP-Djvu ransomware decryption instruction / key file.;
  • Creates a known STOP ransomware variant mutex;
  • STOP ransomware command line behavior detected;
  • Uses suspicious command line tools or Windows utilities;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Ciphering the files kept on the target’s drives — so the victim cannot open these files;
  • Blocking the launching of .exe files of anti-virus programs
  • Blocking the launching of installation files of anti-malware programs

Ransomware has actually been a headache for the last 4 years. It is difficult to realize a more dangerous malware for both individuals and organizations. The algorithms used in Troj/Krypt-XU (usually, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need a lot more time than our galaxy already exists, and possibly will exist. But that malware does not do all these terrible things without delay – it may take up to a few hours to cipher all of your documents. Hence, seeing the Troj/Krypt-XU detection is a clear signal that you have to start the elimination procedure.

Where did I get the Troj/Krypt-XU?

Standard tactics of Troj/Krypt-XU injection are standard for all other ransomware variants. Those are one-day landing sites where victims are offered to download and install the free software, so-called bait e-mails and hacktools. Bait emails are a relatively new method in malware distribution – you get the email that imitates some regular notifications about shippings or bank service conditions shifts. Within the email, there is a corrupted MS Office file, or a link which opens the exploit landing page.

Malicious email spam

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

Preventing it looks quite easy, however, still requires tons of awareness. Malware can hide in different spots, and it is far better to prevent it even before it gets into your PC than to rely upon an anti-malware program. Simple cybersecurity awareness is just an important thing in the modern world, even if your interaction with a PC remains on YouTube videos. That can keep you a great deal of money and time which you would certainly spend while trying to find a fix guide.

Troj/Krypt-XU malware technical details

File Info:

name: 62306F785EEF4D8C33B4.mlw
path: /opt/CAPEv2/storage/binaries/ac87fab7abdecf6db9fec0c005ef7de1490c2a2ec15e887787ee093db0b4ac56
crc32: EE56C15B
md5: 62306f785eef4d8c33b4afd2c2f8b23d
sha1: a7e6f71eecdbfbeacce3d5d92164e443dbaa25f6
sha256: ac87fab7abdecf6db9fec0c005ef7de1490c2a2ec15e887787ee093db0b4ac56
sha512: d2066a3d0c26a1b4f208c22434aa595fd0e04702366956c76f80131c9622566955af8642479664066e7a16e6322923b5dac479b39242f5f54a1df3f3b98b7f35
ssdeep: 12288:wdfVY349jM7auTjDz7XiO9kIuFUs4zeq27sSyYS+HLJ8tRFvSLhPn+Jc3BsrrbkA:wd+46Nv7XxkIRrSyILaFY5n4mBsfb
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1F6F4E113A2D37C61E5165AB28E2E82E46A1DFFA18F5737DF23146E1F04721E1C672B42
sha3_384: ec778c4e79defdf11fdd3abb03ec16c4d59c59f43fa0c2a4b03b0a9c7ec4cea49938754941f302d739585938cc65874a
ep_bytes: e8a2580000e989feffffff3558e04a00
timestamp: 2022-01-09 09:35:09

Version Info:

CompanyName: MagicWind
LegalCopyrights: Challenger fazan inc.
LegalTrademarks2: objfngizdf
ProductName: Latte
Translation: 0x4112 0x0532

Troj/Krypt-XU also known as:

Elasticmalicious (high confidence)
CynetMalicious (score: 100)
AvastPWSX-gen [Trj]
RisingTrojan.Generic@AI.100 (RDML:slg7HtPIAAL+cKoxaqRAHA)
SentinelOneStatic AI – Malicious PE
AVGPWSX-gen [Trj]
CrowdStrikewin/malicious_confidence_100% (D)

How to remove Troj/Krypt-XU?

Troj/Krypt-XU malware is very difficult to remove by hand. It puts its data in multiple places throughout the disk, and can recover itself from one of the elements. Additionally, a range of changes in the registry, networking configurations and Group Policies are pretty hard to find and revert to the original. It is much better to utilize a specific app – exactly, an anti-malware app. GridinSoft Anti-Malware will fit the best for malware removal purposes.

Why GridinSoft Anti-Malware? It is pretty lightweight and has its detection databases updated just about every hour. In addition, it does not have such bugs and exploits as Microsoft Defender does. The combination of these facts makes GridinSoft Anti-Malware suitable for clearing away 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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