Win32/Kryptik.GJBR

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

What is Win32/Kryptik.GJBR infection?

In this post you will discover concerning the definition of Win32/Kryptik.GJBR and its unfavorable effect on your computer system. Such ransomware are a type of malware that is clarified by on-line frauds to require paying the ransom money by a sufferer.

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In the majority of the cases, Win32/Kryptik.GJBR ransomware will certainly instruct its targets to start funds move for the objective of neutralizing the changes that the Trojan infection has introduced to the victim’s gadget.

Win32/Kryptik.GJBR 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.
  • Attempts to connect to a dead IP:Port (2 unique times);
  • 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.
  • A process attempted to delay the analysis task.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Performs some HTTP requests;
  • Unconventionial language used in binary resources: Estonian;
  • Detects Sandboxie through the presence of a library;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • A system process is generating network traffic likely as a result of process injection;
  • 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 the presence of disk drives in the registry, possibly for anti-virtualization;
  • Creates a copy of itself;
  • Ciphering the documents located on the victim’s hard drive — so the sufferer can no longer utilize the information;
  • Preventing normal 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
milliaoin.info Ransom.GandCrypt!8.F33E (CLOUD)
lionoi.adygeya.su Ransom.GandCrypt!8.F33E (CLOUD)
ionoiddi.mangyshlak.su Ransom.GandCrypt!8.F33E (CLOUD)
missidiowi.xyz Ransom.GandCrypt!8.F33E (CLOUD)
io90s8dudi.xyz Ransom.GandCrypt!8.F33E (CLOUD)

Win32/Kryptik.GJBR

One of the most normal networks where Win32/Kryptik.GJBR Ransomware Trojans are injected are:

  • By means of phishing emails;
  • As a consequence of individual ending up on a resource that holds a malicious software;

As soon as the Trojan is effectively infused, it will certainly either cipher the information on the target’s computer or prevent the tool from working in a correct fashion – while also putting a ransom money note that points out the need for the victims to effect the payment for the function of decrypting the documents or restoring the data system back to the first problem. In the majority of circumstances, the ransom note will turn up when the client reboots the COMPUTER after the system has actually already been damaged.

Win32/Kryptik.GJBR distribution channels.

In various edges of the globe, Win32/Kryptik.GJBR expands by jumps and also bounds. However, the ransom notes as well as techniques of extorting the ransom amount might differ depending on certain neighborhood (local) settings. The ransom money notes and methods of obtaining the ransom money quantity may differ depending on specific local (local) setups.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software application.

    In certain areas, the Trojans often wrongfully report having actually found some unlicensed applications made it possible for on the sufferer’s device. The alert after that demands the individual to pay the ransom.

    Faulty declarations concerning unlawful web content.

    In countries where software piracy is much less popular, this method is not as effective for the cyber fraudulences. Additionally, the Win32/Kryptik.GJBR popup alert may wrongly claim to be deriving from a law enforcement establishment and also will report having situated child porn or other illegal information on the device.

    Win32/Kryptik.GJBR popup alert may falsely claim to be acquiring from a law enforcement organization and will certainly report having situated child porn or various other unlawful data on the gadget. The alert will similarly include a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: DCBFDAAA
md5: 50e22beb41a5ef7a0cbde8bb3e2a1eaa
name: 50E22BEB41A5EF7A0CBDE8BB3E2A1EAA.mlw
sha1: 39428298425f223f7bce33aae0e272a165dfb5e4
sha256: 4e4700b68451c8fc77c6ed0991293458e5054cf6d3e483a5cd83d7c0d7ae9a65
sha512: e959986026e2a07effa51b316989e12131a14fca6cb18e59505aee21fb86b6b75511d4b014a4c22118091801f329c6d5548627e7c68561b4b5f6ee9fd6e5fadf
ssdeep: 3072:7B7hD9c5sAYoy3a5KSLN6EorlHfJ5IhqBoNtT4q0c8saCvv:7rWsADyRSLwEoryU6tkqThaCn
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0809 0x04b0

Win32/Kryptik.GJBR also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.BRMon.Gen.4
FireEye Generic.mg.50e22beb41a5ef7a
CAT-QuickHeal Trojan.Chapak.ZZ6
McAfee Packed-FJJ!50E22BEB41A5
Cylance Unsafe
AegisLab Trojan.Win32.GandCrypt.trv4
Sangfor Trojan.Win32.Save.a
K7AntiVirus Riskware ( 0040eff71 )
BitDefender Trojan.BRMon.Gen.4
K7GW Riskware ( 0040eff71 )
Cybereason malicious.b41a5e
Cyren W32/Kryptik.HB.gen!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Trojan:Win32/Bunitu.8fa6475f
NANO-Antivirus Trojan.Win32.GandCrypt.ffqvhp
Rising Ransom.GandCrypt!8.F33E (CLOUD)
Ad-Aware Trojan.BRMon.Gen.4
Emsisoft Trojan.BRMon.Gen.4 (B)
Comodo TrojWare.Win32.TrojanDownloader.Godzilla.B@7tk49d
F-Secure Heuristic.HEUR/AGEN.1102756
DrWeb Trojan.Encoder.24384
Zillya Trojan.GenericKDZ.Win32.2111
TrendMicro Ransom_GANDCRAB.SMALY-3
McAfee-GW-Edition BehavesLike.Win32.Generic.ch
Sophos Mal/Generic-R + Mal/GandCrab-B
Ikarus Trojan.Win32.Crypt
Jiangmin Trojan.GandCrypt.hm
MaxSecure Ransomeware.GandCrypt.Gen
Avira HEUR/AGEN.1102756
MAX malware (ai score=88)
Antiy-AVL Trojan[Ransom]/Win32.GandCrypt
Microsoft TrojanProxy:Win32/Bunitu.Q!bit
Arcabit Trojan.BRMon.Gen.4
SUPERAntiSpyware Trojan.Agent/Gen-Emotet
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.BRMon.Gen.4
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/Gandcrab04.Exp
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34590.muW@aSz2DdnI
ALYac Trojan.Ransom.GandCrab
VBA32 BScope.Trojan.Vigorf
Malwarebytes Generic.Malware/Suspicious
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.GJBR
TrendMicro-HouseCall Ransom_GANDCRAB.SMALY-3
Tencent Win32.Backdoor.Mokes.Swba
Yandex Trojan.GandCrypt!BsBSXOn0sxo
SentinelOne Static AI – Suspicious PE
Fortinet W32/Kryptik.GJBV!tr
AVG Win32:Malware-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.e2e

How to remove Win32/Kryptik.GJBR 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.GJBR 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 Win32/Kryptik.GJBR 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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