What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is MSIL/Kryptik.VAJ infection?

In this article you will locate concerning the definition of MSIL/Kryptik.VAJ and also its adverse impact on your computer. Such ransomware are a form of malware that is clarified by on the internet scams to demand paying the ransom by a target.

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In the majority of the cases, MSIL/Kryptik.VAJ infection will certainly advise its sufferers to launch funds transfer for the function of counteracting the modifications that the Trojan infection has actually introduced to the victim’s device.

MSIL/Kryptik.VAJ Summary

These alterations can be as adheres to:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Steals private information from local Internet browsers;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Ciphering the documents located on the victim’s disk drive — so the victim can no longer utilize the data;
  • Preventing routine access to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


The most typical networks where MSIL/Kryptik.VAJ Trojans are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of user winding up on a source that holds a harmful software;

As soon as the Trojan is effectively injected, it will either cipher the data on the victim’s computer or protect against the gadget from functioning in a proper fashion – while likewise putting a ransom money note that mentions the demand for the victims to impact the settlement for the purpose of decrypting the papers or recovering the file system back to the first problem. In many circumstances, the ransom money note will certainly turn up when the customer reboots the PC after the system has actually already been harmed.

MSIL/Kryptik.VAJ distribution networks.

In various edges of the globe, MSIL/Kryptik.VAJ expands by leaps and also bounds. Nonetheless, the ransom money notes and also techniques of extorting the ransom amount may vary depending upon specific local (regional) setups. The ransom notes and methods of extorting the ransom money amount might vary depending on certain local (local) settings.

Ransomware injection

As an example:

    Faulty notifies about unlicensed software program.

    In certain areas, the Trojans usually wrongfully report having identified some unlicensed applications enabled on the victim’s gadget. The sharp then requires the individual to pay the ransom money.

    Faulty declarations concerning prohibited web content.

    In nations where software application piracy is much less preferred, this method is not as effective for the cyber frauds. Alternatively, the MSIL/Kryptik.VAJ popup alert might falsely declare to be stemming from a police organization and will report having situated child porn or other prohibited data on the tool.

    MSIL/Kryptik.VAJ popup alert may falsely declare to be acquiring from a regulation enforcement organization as well as will report having located child porn or other prohibited information on the device. The alert will similarly include a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: C451C077
md5: 119de34ca98c1d1a12b41dba6aa62da6
name: 74740069.exe
sha1: b5e5c10c49a388e41b2acd3982a810ffb19be870
sha256: e0c8f0d447a137e754ad485c326ccc13edfac29b41fda042f837c6dc1cb6cdf8
sha512: 11e4fd611a478935e21ff384aa568e67753b0ee1db6fcb4fc8d90371426054b63ec943ddc5b619ab15babd2067cc18d01d2d2110d9966e8c8af11540da29d47c
ssdeep: 6144:YBTL6RkI2GhN5X8B3/tdOHBFyNzWtWSAJUoh0dXND84m2:UL6h2iN5X8B3/mkCT91
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2018 - 2020
Assembly Version:
InternalName: CDiQxhslHbbqTAuy.exe
ProductName: CalculatorExt
FileDescription: CalculatorExt
OriginalFilename: CDiQxhslHbbqTAuy.exe

MSIL/Kryptik.VAJ also known as:

GridinSoft Trojan.Ransom.Gen
DrWeb Trojan.PWS.Siggen2.44912
MicroWorld-eScan Gen:Variant.MSILPerseus.212953
Qihoo-360 Generic/Trojan.f2a
ALYac Gen:Variant.MSILPerseus.212953
Malwarebytes Spyware.AgentTesla
AegisLab Trojan.MSIL.Crypt.4!c
Sangfor Malware
CrowdStrike win/malicious_confidence_90% (W)
BitDefender Gen:Variant.MSILPerseus.212953
K7GW Trojan ( 005625c41 )
Arcabit Trojan.MSILPerseus.D33FD9
BitDefenderTheta Gen:NN.ZemsilF.34100.Em0@aGgU@jp
Cyren W32/MSIL_Kryptik.AIL.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Kryptik.VAJ
APEX Malicious
Avast Win32:RansomX-gen [Ransom]
Kaspersky Trojan.MSIL.Crypt.hmyf
Alibaba Trojan:MSIL/Kryptik.33607115
Rising Trojan.Lokibot!8.F1B5 (CLOUD)
Ad-Aware Gen:Variant.MSILPerseus.212953
Emsisoft Gen:Variant.MSILPerseus.212953 (B)
F-Secure Trojan.TR/Kryptik.jibpr
Fortinet MSIL/Kryptik.VAG!tr
Sophos Mal/Generic-S
Ikarus Trojan.MSIL.Inject
F-Prot W32/MSIL_Kryptik.AIL.gen!Eldorado
Webroot W32.Trojan.Gen
Avira TR/Kryptik.jibpr
MAX malware (ai score=100)
Endgame malicious (high confidence)
Microsoft Trojan:Win32/Occamy.C
ZoneAlarm Trojan.MSIL.Crypt.hmyf
Cylance Unsafe
Panda Trj/GdSda.A
TrendMicro-HouseCall TROJ_GEN.R002H0CCD20
Tencent Msil.Trojan.Crypt.Dwtp
SentinelOne DFI – Suspicious PE
GData Gen:Variant.MSILPerseus.212953
AVG Win32:RansomX-gen [Ransom]

How to remove MSIL/Kryptik.VAJ virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for MSIL/Kryptik.VAJ files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

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If the guide doesn’t help you to remove MSIL/Kryptik.VAJ you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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