Win32/Kryptik.BJUY

Written by Robert Bailey

What is Win32/Kryptik.BJUY infection?

In this post you will discover regarding the interpretation of Win32/Kryptik.BJUY and also its adverse effect on your computer. Such ransomware are a kind of malware that is elaborated by on-line scams to demand paying the ransom by a victim.

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Most of the situations, Win32/Kryptik.BJUY infection will certainly instruct its victims to initiate funds transfer for the objective of counteracting the amendments that the Trojan infection has presented to the sufferer’s device.

Win32/Kryptik.BJUY 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 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.

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Code injection with CreateRemoteThread in a remote process;
  • 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 copy of itself;
  • 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.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents situated on the target’s disk drive — so the target can no more utilize the data;
  • Preventing regular access 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.
Similar behavior
Related domains
z.whorecord.xyz BehavesLike.Win32.VirRansom.dc
a.tomx.xyz BehavesLike.Win32.VirRansom.dc

Win32/Kryptik.BJUY

The most normal networks through which Win32/Kryptik.BJUY Trojans are infused are:

  • By ways of phishing emails;
  • As a repercussion of user ending up on a resource that holds a destructive software program;

As quickly as the Trojan is efficiently injected, it will either cipher the information on the sufferer’s computer or prevent the tool from working in an appropriate fashion – while also putting a ransom note that points out the requirement for the sufferers to effect the payment for the objective of decrypting the papers or restoring the data system back to the preliminary problem. In many instances, the ransom money note will certainly show up when the customer reboots the COMPUTER after the system has actually already been damaged.

Win32/Kryptik.BJUY distribution networks.

In different corners of the world, Win32/Kryptik.BJUY grows by leaps as well as bounds. Nevertheless, the ransom notes and techniques of extorting the ransom money quantity may vary depending on particular neighborhood (regional) settings. The ransom money notes and also techniques of obtaining the ransom money quantity might differ depending on particular local (local) setups.

Ransomware injection

For instance:

    Faulty notifies about unlicensed software program.

    In specific locations, the Trojans frequently wrongfully report having actually spotted some unlicensed applications enabled on the victim’s tool. The alert after that requires the customer to pay the ransom.

    Faulty statements concerning unlawful web content.

    In nations where software piracy is much less prominent, this approach is not as efficient for the cyber fraudulences. Alternatively, the Win32/Kryptik.BJUY popup alert may incorrectly declare to be originating from a law enforcement organization and will report having situated youngster pornography or other illegal information on the device.

    Win32/Kryptik.BJUY popup alert might falsely claim to be deriving from a legislation enforcement establishment and will certainly report having situated child pornography or other prohibited data on the device. The alert will in a similar way consist of a need for the customer to pay the ransom.

Technical details

File Info:

crc32: 2BE9355F
md5: f9218bb7b3c47b718e5a5416d54ba2bd
name: F9218BB7B3C47B718E5A5416D54BA2BD.mlw
sha1: eceef47603a6bbde036108751359bd7ebe501369
sha256: 9e574d1ae10333db6bf6d204f09e3033102ee26519c9f20291af4a0fb3aa57b3
sha512: 546f4da10ff7aeb88d6c1bcc50dda1ae3430a895d93540cf8fd44aa699b88f91d2cb28308b0753aac763191a7376435f9f11cc7739ad3db35654392c148af60d
ssdeep: 6144:v4nhDPVCYRiVUH2dxJOR8ghuinERN3Kvq3tHDIfqG6lPK0:gRPwYAVlvJWhVnuKvMZN
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.BJUY also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004bdd061 )
Cynet Malicious (score: 100)
ALYac Trojan.Autoruns.GenericKDS.44545087
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_70% (D)
K7GW Trojan ( 004bdd061 )
Cybereason malicious.7b3c47
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.BJUY
APEX Malicious
Avast Win32:LockScreen-AFB [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.Autoruns.GenericKDS.44545087
NANO-Antivirus Trojan.Win32.Blocker.cidkoz
MicroWorld-eScan Trojan.Autoruns.GenericKDS.44545087
Tencent Win32.Trojan.Blocker.Ecjp
Ad-Aware Trojan.Autoruns.GenericKDS.44545087
Sophos Mal/Generic-R + Mal/EncPk-ALZ
Comodo Malware@#2of7b2g3xnf70
BitDefenderTheta Gen:NN.ZexaF.34690.ruWaamkQttl
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.VirRansom.dc
FireEye Generic.mg.f9218bb7b3c47b71
Emsisoft Trojan.Autoruns.GenericKDS.44545087 (B)
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_100%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/Dynamer!ac
AegisLab Trojan.Win32.Blocker.j!c
GData Trojan.Autoruns.GenericKDS.44545087
Acronis suspicious
McAfee Artemis!F9218BB7B3C4
MAX malware (ai score=82)
Panda Trj/CI.A
Rising Trojan.Toga!8.136D (CLOUD)
Yandex Trojan.GenAsa!c4frgpfCbno
Ikarus Trojan.Crypt2
Fortinet W32/Blocker.CMGO!tr
AVG Win32:LockScreen-AFB [Trj]

How to remove Win32/Kryptik.BJUY 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 Win32/Kryptik.BJUY 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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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Win32/Kryptik.BJUY 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/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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