Win32/Kryptik.EXZK

Written by Robert Bailey

What is Win32/Kryptik.EXZK infection?

In this article you will find concerning the interpretation of Win32/Kryptik.EXZK and also its adverse impact on your computer. Such ransomware are a type of malware that is specified by on-line scams to require paying the ransom money by a target.

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Most of the cases, Win32/Kryptik.EXZK virus will advise its targets to initiate funds transfer for the purpose of reducing the effects of the modifications that the Trojan infection has introduced to the target’s tool.

Win32/Kryptik.EXZK Summary

These adjustments can be as follows:

  • 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.
  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Attempts to stop active services;
  • 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.
  • Operates on local firewall’s policies and settings;
  • Creates a copy of itself;
  • Attempts to disable UAC.

    User Account Control or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on PC.

    UAC includes several technologies 1:

    • File and egistry Virtualization;
    • Same-desktop Elevation;
    • Filtered Token;
    • User Interface Privilege Isolation;
    • Protected Mode Internet Explorer;
    • Installer Detection;
  • Attempts to disable Windows Defender;
  • Attempts to modify or disable Security Center warnings;
  • Ciphering the files found on the target’s hard disk — so the victim can no more use the information;
  • Preventing routine accessibility to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Win32/Kryptik.EXZK

The most typical channels through which Win32/Kryptik.EXZK are infused 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 individual ending up on a source that organizes a malicious software;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the sufferer’s computer or avoid the gadget from working in an appropriate fashion – while likewise putting a ransom money note that mentions the requirement for the sufferers to effect the payment for the objective of decrypting the documents or restoring the data system back to the first condition. In many instances, the ransom money note will certainly turn up when the client restarts the PC after the system has already been damaged.

Win32/Kryptik.EXZK distribution networks.

In different corners of the globe, Win32/Kryptik.EXZK expands by leaps and bounds. However, the ransom notes and also methods of obtaining the ransom money quantity may differ relying on certain local (regional) settings. The ransom notes as well as tricks of obtaining the ransom quantity might vary depending on certain regional (local) settings.

Ransomware injection

For instance:

    Faulty notifies about unlicensed software application.

    In certain areas, the Trojans typically wrongfully report having detected some unlicensed applications allowed on the sufferer’s tool. The alert after that demands the user to pay the ransom.

    Faulty statements concerning prohibited web content.

    In countries where software program piracy is much less preferred, this technique is not as reliable for the cyber frauds. Alternatively, the Win32/Kryptik.EXZK popup alert might falsely assert to be stemming from a police establishment and also will report having situated kid pornography or various other illegal data on the tool.

    Win32/Kryptik.EXZK popup alert might incorrectly declare to be obtaining from a legislation enforcement institution and will report having situated kid porn or other unlawful data on the tool. The alert will likewise include a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 2FD1954B
md5: 1acbf760f2e3386e6e2c45ab9fe34707
name: 1ACBF760F2E3386E6E2C45AB9FE34707.mlw
sha1: 212eb4b1829aa1c4b7791ac9ff024a8fd327caad
sha256: 497e1689921e776478d4fbb4ac5067356fa05c31962b7ff4b98b56488018e20e
sha512: 5cbc14291e81e9aeb46aa17ba77525645f985380ecb1eba2b002215b0dbf2612b620501def70e6330ad5be09b1810e96e3390188b8b6348155b77d86eb1da0ab
ssdeep: 3072:umgxG0sbKo0Yncl/cuTJFp08cL+rxGCRte8NnTKv3OkLJs0C5yGC7h:mxGt+CvuLpYL+rQCRtZWve0hFh
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.EXZK also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
DrWeb Win32.HLLM.Reset.495
Cynet Malicious (score: 99)
ALYac Trojan.BrsecmonE.1
Cylance Unsafe
Zillya Trojan.Blocker.Win32.34511
Sangfor Trojan.Win32.GenericKD.3
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Blocker.72808f63
K7GW Trojan ( 0056e8341 )
K7AntiVirus Trojan ( 0056e8341 )
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.EXZK
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.ijqn
BitDefender Trojan.BrsecmonE.1
NANO-Antivirus Trojan.Win32.Reset.ecpnrp
MicroWorld-eScan Trojan.BrsecmonE.1
Tencent Malware.Win32.Gencirc.114b7754
Ad-Aware Trojan.BrsecmonE.1
Sophos Mal/Generic-S
F-Secure Heuristic.HEUR/AGEN.1128810
BitDefenderTheta Gen:NN.ZexaF.34678.qqW@aKs!Z8ai
VIPRE Trojan.Win32.Generic!BT
TrendMicro PE_RAMNIT.REMNANV-O
McAfee-GW-Edition BehavesLike.Win32.Swizzor.dc
FireEye Generic.mg.1acbf760f2e3386e
Emsisoft Trojan.BrsecmonE.1 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.Blocker.dfv
Webroot W32.Rogue.Gen
Avira HEUR/AGEN.1128810
eGambit Unsafe.AI_Score_96%
Kingsoft Win32.Troj.GenericKD.v.(kcloud)
Microsoft Trojan:Win32/Dynamer!ac
Arcabit Trojan.BrsecmonE.1
AegisLab Trojan.Win32.Blocker.j!c
ZoneAlarm Trojan-Ransom.Win32.Blocker.ijqn
GData Trojan.BrsecmonE.1
AhnLab-V3 Malware/Win32.Ramn.C1461735
Acronis suspicious
McAfee Artemis!1ACBF760F2E3
MAX malware (ai score=100)
VBA32 Malware-Cryptor.Limpopo
Malwarebytes MachineLearning/Anomalous.100%
Panda Trj/Genetic.gen
TrendMicro-HouseCall PE_RAMNIT.REMNANV-O
Rising Ransom.Blocker!8.12A (CLOUD)
Ikarus Virus.Win32.Ramnit
Fortinet W32/Kryptik.EJXP!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HgIASOoA

How to remove Win32/Kryptik.EXZK 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 GridinSoft2

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft3.

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 Win32/Kryptik.EXZK 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 Win32/Kryptik.EXZK you can always ask me in the comments for getting help.

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References

  1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server
  2. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  3. More information about GridinSoft products: https://gridinsoft.com/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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