Win32/Kryptik.GESJ

What is Win32/Kryptik.GESJ infection?

In this article you will discover regarding the interpretation of Win32/Kryptik.GESJ and also its adverse effect on your computer. Such ransomware are a kind of malware that is clarified by online fraudulences to require paying the ransom money by a victim.

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In the majority of the instances, Win32/Kryptik.GESJ virus will certainly advise its targets to start funds transfer for the objective of neutralizing the amendments that the Trojan infection has presented to the victim’s tool.

Win32/Kryptik.GESJ Summary

These modifications 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.
  • 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.
  • Attempts to delete volume shadow copies;
  • 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;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files located on the victim’s disk drive — so the target can no longer 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.GESJ

The most typical channels whereby Win32/Kryptik.GESJ are injected are:

  • By methods of phishing emails;
  • As a consequence of user winding up on a resource that hosts a harmful software;

As quickly as the Trojan is successfully injected, it will certainly either cipher the information on the victim’s PC or avoid the tool from working in a correct fashion – while also putting a ransom note that states the demand for the sufferers to impact the payment for the purpose of decrypting the documents or restoring the file system back to the first condition. In a lot of circumstances, the ransom note will turn up when the customer reboots the PC after the system has already been harmed.

Win32/Kryptik.GESJ circulation networks.

In numerous edges of the world, Win32/Kryptik.GESJ expands by jumps and also bounds. Nonetheless, the ransom notes and also techniques of extorting the ransom amount may differ relying on specific neighborhood (local) settings. The ransom money notes and tricks of extorting the ransom money quantity may vary depending on specific regional (regional) setups.

Ransomware injection

For instance:

    Faulty informs about unlicensed software.

    In certain locations, the Trojans typically wrongfully report having actually found some unlicensed applications allowed on the victim’s tool. The sharp then requires the customer to pay the ransom.

    Faulty statements about unlawful material.

    In countries where software piracy is much less preferred, this technique is not as efficient for the cyber scams. Conversely, the Win32/Kryptik.GESJ popup alert might wrongly declare to be stemming from a police establishment as well as will report having situated child pornography or other illegal information on the tool.

    Win32/Kryptik.GESJ popup alert might wrongly declare to be acquiring from a regulation enforcement institution and also will report having situated youngster pornography or other prohibited information on the device. The alert will likewise include a need for the user to pay the ransom money.

Technical details

File Info:

crc32: ADF1C84C
md5: 18c62e60454991c18cdbe507d83ef8c2
name: 18C62E60454991C18CDBE507D83EF8C2.mlw
sha1: b5a4e5738dd557bec5cf85e615c11d0ba483e02e
sha256: 8d590a515ef79a5f5a1a8d5d06d89ee08a2a539c98098b880ca6539bca341d1d
sha512: 5314ff2f218378c1931418838cbc6248887ec6ff19be97f43dd4b896b8c7bc8060da1a1d746fd6b34ef5b352c95ef6c4adf1021751db209f578141447e134033
ssdeep: 6144:x8RlDK4Zw27T45r3jYWIsZJ5eN1JIHqSgGv37F5J:xIW4bv+r3t7ZiJIfgSfJ
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GESJ also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0051acb71 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.3953
Cynet Malicious (score: 85)
ALYac Trojan.Ransom.Crysis
Cylance Unsafe
Zillya Trojan.Crusis.Win32.537
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Crusis.a4edb39c
K7GW Trojan ( 0051acb71 )
Cybereason malicious.045499
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.GESJ
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Crusis.akp
BitDefender Trojan.GenericKD.6152605
NANO-Antivirus Trojan.Win32.Crusis.eurljb
ViRobot Trojan.Win32.S.Sagecrypt.294912
MicroWorld-eScan Trojan.GenericKD.6152605
Tencent Win32.Trojan.Raas.Auto
Ad-Aware Trojan.GenericKD.6152605
Sophos Mal/Generic-S
BitDefenderTheta Gen:NN.ZexaF.34608.sqW@aWM8v2ki
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_HPLOCKY.SME
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
FireEye Generic.mg.18c62e60454991c1
Emsisoft Trojan.GenericKD.6152605 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Crypt.ZPACK.yiisz
eGambit Unsafe.AI_Score_99%
Microsoft Ransom:Win32/Wadhrama
GData Trojan.GenericKD.6152605
TACHYON Ransom/W32.Crusis.294912.B
AhnLab-V3 Win-Trojan/Sagecrypt.Gen
Acronis suspicious
McAfee Artemis!18C62E604549
MAX malware (ai score=100)
VBA32 BScope.Trojan.Yakes
Panda Trj/CI.A
TrendMicro-HouseCall Ransom_HPLOCKY.SME
Rising Ransom.Crusis!8.5724 (CLOUD)
Ikarus Trojan-Ransom.GandCrab
Fortinet W32/GenKryptik.BBZQ!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.CrySiS.HwkAyBAA

How to remove Win32/Kryptik.GESJ 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

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.GESJ 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.GESJ 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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