MSIL/Kryptik.AJZ

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

What is MSIL/Kryptik.AJZ infection?

In this short article you will certainly discover about the interpretation of MSIL/Kryptik.AJZ and also its negative influence on your computer system. Such ransomware are a form of malware that is specified by on-line scams to require paying the ransom money by a victim.

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Most of the instances, MSIL/Kryptik.AJZ ransomware will certainly advise its victims to initiate funds move for the objective of reducing the effects of the modifications that the Trojan infection has actually introduced to the victim’s tool.

MSIL/Kryptik.AJZ 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);
  • Injection with CreateRemoteThread in a remote process;
  • 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.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • A process created a hidden window;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Uses Windows utilities for basic functionality;
  • Detects Sandboxie through the presence of a library;
  • Code injection with CreateRemoteThread in a remote process;
  • Sniffs keystrokes;
  • Executed a process and injected code into it, probably while unpacking;
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Creates a copy of itself;
  • Creates known SpyNet mutexes and/or registry changes.;
  • Ciphering the papers located on the victim’s hard disk drive — so the target can no longer make use of the data;
  • Preventing normal accessibility to the victim’s workstation;

MSIL/Kryptik.AJZ

The most typical channels through which MSIL/Kryptik.AJZ Trojans are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As an effect of customer winding up on a resource that holds a harmful software program;

As quickly as the Trojan is efficiently infused, it will certainly either cipher the information on the sufferer’s computer or prevent the device from functioning in an appropriate fashion – while additionally positioning a ransom note that discusses the requirement for the targets to impact the settlement for the function of decrypting the documents or restoring the file system back to the preliminary condition. In most circumstances, the ransom money note will certainly turn up when the client reboots the PC after the system has already been harmed.

MSIL/Kryptik.AJZ circulation channels.

In numerous corners of the world, MSIL/Kryptik.AJZ grows by jumps as well as bounds. However, the ransom money notes as well as tricks of obtaining the ransom amount may differ relying on specific regional (regional) settings. The ransom money notes and methods of obtaining the ransom amount might differ depending on certain neighborhood (regional) setups.

Ransomware injection

For example:

    Faulty signals about unlicensed software program.

    In certain locations, the Trojans commonly wrongfully report having found some unlicensed applications enabled on the target’s gadget. The alert after that requires the customer to pay the ransom money.

    Faulty statements about illegal material.

    In countries where software piracy is much less popular, this approach is not as effective for the cyber frauds. Alternatively, the MSIL/Kryptik.AJZ popup alert might incorrectly assert to be deriving from a law enforcement organization as well as will certainly report having situated kid porn or other illegal information on the gadget.

    MSIL/Kryptik.AJZ popup alert might falsely assert to be obtaining from a law enforcement institution and will report having situated kid pornography or other illegal data on the tool. The alert will in a similar way contain a need for the user to pay the ransom.

Technical details

File Info:

crc32: 131E319D
md5: 732e45fd5708d2c1caef90e3ea73a026
name: 732E45FD5708D2C1CAEF90E3EA73A026.mlw
sha1: b273f4ae1163d31a08ea3249bcabdf0e7e3f0059
sha256: 28524887d5c9b6282139998bf915224fb09d66bcc5b7b28f43f78450193e8394
sha512: ccd51e1ed725f39b5f2bb8c1150245bed8db0a005d63222b8bc690029b95781dd6f5d73e173b9edc4a184bef7c6d928d56508cc9ee4b8391e5dbc9063967ffc2
ssdeep: 12288:BlzmTWEBMVYYa3ozbJ927ZPVodNq3A4Ly8a:8BMVTi29ytNe8a
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2017
Assembly Version: 1.0.0.0
InternalName: STTT.exe
FileVersion: 1.0.0.0
ProductName: STTT
ProductVersion: 1.0.0.0
FileDescription: STTT
OriginalFilename: STTT.exe

MSIL/Kryptik.AJZ also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 700000121 )
Elastic malicious (high confidence)
DrWeb Trojan.Starter.2890
Cynet Malicious (score: 100)
ALYac Gen:Variant.Razy.122286
Cylance Unsafe
Zillya Trojan.Kryptik.Win32.1076797
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Trojan:MSIL/Kryptik.36a63f5e
K7GW Trojan ( 700000121 )
Cybereason malicious.d5708d
Cyren W32/MSIL_Kryptik.BXN.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Kryptik.AJZ
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan-Ransom.MSIL.Blocker.gen
BitDefender Gen:Variant.Razy.122286
NANO-Antivirus Trojan.Win32.Kryptik.eljoqz
MicroWorld-eScan Gen:Variant.Razy.122286
Tencent Win32.Trojan.Generic.Aeoc
Ad-Aware Gen:Variant.Razy.122286
Sophos Mal/Generic-S
Comodo Malware@#2va4xgi8a4nhe
BitDefenderTheta Gen:NN.ZemsilF.34608.Hq3@aKS1UEp
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.hh
FireEye Generic.mg.732e45fd5708d2c1
Emsisoft Gen:Variant.Razy.122286 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Dropper.Gen
eGambit Unsafe.AI_Score_100%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Worm:Win32/Rebhip
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan-Ransom.MSIL.Blocker.gen
GData Gen:Variant.Razy.122286
McAfee Artemis!732E45FD5708
MAX malware (ai score=81)
Panda Trj/CI.A
Ikarus Trojan-Dropper
Fortinet W32/Generic!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HgIASOcA

How to remove MSIL/Kryptik.AJZ ransomware?

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

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

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.AJZ 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

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

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

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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