Win32/Kryptik.GEFD

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

What is Win32/Kryptik.GEFD infection?

In this article you will discover concerning the interpretation of Win32/Kryptik.GEFD and also its adverse impact on your computer. Such ransomware are a type of malware that is specified by on the internet scams to require paying the ransom by a victim.

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In the majority of the cases, Win32/Kryptik.GEFD ransomware will advise its targets to start funds move for the purpose of neutralizing the amendments that the Trojan infection has actually presented to the sufferer’s tool.

Win32/Kryptik.GEFD Summary

These adjustments can be as complies with:

  • 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.

  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • 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
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the sufferer’s hard disk — so the sufferer can no more make use of the information;
  • Preventing routine access to the victim’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
ipv4bot.whatismyipaddress.com Trojan.Ransom.GandCrab.Gen.2
ns1.virmach.ru Trojan.Ransom.GandCrab.Gen.2
politiaromana.bit Trojan.Ransom.GandCrab.Gen.2
malwarehunterteam.bit Trojan.Ransom.GandCrab.Gen.2
ns2.virmach.ru Trojan.Ransom.GandCrab.Gen.2
gdcb.bit Trojan.Ransom.GandCrab.Gen.2

Win32/Kryptik.GEFD

The most regular networks whereby Win32/Kryptik.GEFD 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 a repercussion of individual ending up on a resource that holds a malicious software;

As quickly as the Trojan is effectively injected, it will certainly either cipher the data on the target’s PC or stop the gadget from working in a correct manner – while also placing a ransom note that points out the demand for the victims to effect the repayment for the purpose of decrypting the papers or restoring the file system back to the preliminary condition. In many instances, the ransom money note will certainly come up when the customer reboots the COMPUTER after the system has already been damaged.

Win32/Kryptik.GEFD circulation networks.

In numerous edges of the globe, Win32/Kryptik.GEFD expands by jumps and bounds. Nonetheless, the ransom notes as well as techniques of obtaining the ransom money amount may differ relying on specific local (regional) setups. The ransom notes and also techniques of obtaining the ransom money quantity might vary depending on specific local (regional) settings.

Ransomware injection

For instance:

    Faulty notifies concerning unlicensed software application.

    In certain locations, the Trojans commonly wrongfully report having identified some unlicensed applications allowed on the victim’s tool. The sharp after that demands the individual to pay the ransom money.

    Faulty declarations regarding prohibited content.

    In nations where software piracy is less prominent, this method is not as efficient for the cyber fraudulences. Additionally, the Win32/Kryptik.GEFD popup alert may wrongly assert to be originating from a law enforcement organization and also will certainly report having situated child pornography or other unlawful data on the tool.

    Win32/Kryptik.GEFD popup alert might falsely claim to be acquiring from a regulation enforcement organization as well as will certainly report having located child pornography or various other illegal information on the tool. The alert will similarly include a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 1FDBBF2A
md5: 45d7d04a2a1cbd73b025e4b5629ae100
name: 45D7D04A2A1CBD73B025E4B5629AE100.mlw
sha1: 5fd4c9f77679ca85bfe7d8f21a5b7077fce0b2bb
sha256: 7786c2c15c2f2737944700a173d5b9ca85422ec5ad52e227d4a1e45e66b3cd97
sha512: be73d7ccf71ceec82e2cc4ee0839320b86a209dfc0f8c4b91e9a5aa776d812b5c0d0fb6e2f0efe05955bc765c9d4f496f292ef30acebfbc264c5e51c3c929b0f
ssdeep: 6144:TGkLLh3frb44FHFuPGw/LZ1RO/eFQXVBWAK6OPY:n3dr7szUeFQlB5KzPY
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GEFD also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.24832
MicroWorld-eScan Trojan.Ransom.GandCrab.Gen.2
FireEye Generic.mg.45d7d04a2a1cbd73
CAT-QuickHeal Trojan.Chapak.A03
ALYac Trojan.Ransom.GandCrab.Gen.2
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Chapak.4!c
Sangfor Win.Packed.Gandcrab-6552923-4
K7AntiVirus Trojan ( 0052a8671 )
BitDefender Trojan.Ransom.GandCrab.Gen.2
K7GW Trojan ( 0052a8671 )
Cybereason malicious.a2a1cb
BitDefenderTheta Gen:NN.ZexaF.34590.ruX@a8eOPypi
Cyren W32/Gandcrab.BH.gen!Eldorado
Symantec Packed.Generic.525
TrendMicro-HouseCall Ransom.Win32.GANDCRAB.SMLA.hp
Avast Win32:Adware-gen [Adw]
ClamAV Win.Packed.Gandcrab-6552923-4
Kaspersky Trojan.Win32.Chapak.axp
NANO-Antivirus Trojan.Win32.Chapak.eyuhll
ViRobot Trojan.Win32.GandCrab.Gen.A
Rising Trojan.Kryptik!1.B0B1 (RDMK:cmRtazpeAR9xz/t3/JJulNdI/jWT)
Ad-Aware Trojan.Ransom.GandCrab.Gen.2
TACHYON Trojan/W32.Chapak.280072
Sophos ML/PE-A + Mal/Agent-AUL
Comodo TrojWare.Win32.Magniber.C@7kb5s9
F-Secure Heuristic.HEUR/AGEN.1107509
Zillya Trojan.Agentb.Win32.19023
TrendMicro Ransom.Win32.GANDCRAB.SMLA.hp
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
Emsisoft Trojan.Ransom.GandCrab.Gen.2 (B)
Ikarus Trojan.Kryptik
Jiangmin Trojan.Chapak.ag
MaxSecure Ransomeware.CRAB.gen
Avira HEUR/AGEN.1107509
Antiy-AVL Trojan/Win32.Chapak
Microsoft Ransom:Win32/GandCrab.AQ
Arcabit Trojan.Ransom.GandCrab.Gen.2
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
ZoneAlarm Trojan.Win32.Chapak.axp
GData Trojan.Ransom.GandCrab.Gen.2
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/Gandcrab.Exp
Acronis suspicious
McAfee Packed-FBN!45D7D04A2A1C
MAX malware (ai score=99)
VBA32 Trojan.Chapak
Malwarebytes Trojan.MalPack.Generic
Panda Trj/Genetic.gen
APEX Malicious
ESET-NOD32 a variant of Win32/Kryptik.GEFD
Tencent Malware.Win32.Gencirc.10b9e706
Yandex Trojan.GenAsa!cBr7kpumBqU
SentinelOne Static AI – Malicious PE
Fortinet W32/GenKryptik.DWPH!tr
AVG Win32:Adware-gen [Adw]
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.bb7

How to remove Win32/Kryptik.GEFD virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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.GEFD 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.GEFD 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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