Win32/Kryptik.GECU

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

What is Win32/Kryptik.GECU infection?

In this post you will certainly discover regarding the interpretation of Win32/Kryptik.GECU and also its adverse effect on your computer system. Such ransomware are a form of malware that is elaborated by online scams to demand paying the ransom money by a victim.

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Most of the situations, Win32/Kryptik.GECU virus will instruct its targets to launch funds transfer for the function of neutralizing the modifications that the Trojan infection has actually introduced to the sufferer’s tool.

Win32/Kryptik.GECU Summary

These alterations 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;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records found on the sufferer’s disk drive — so the sufferer 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.
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.GECU

One of the most normal networks through which Win32/Kryptik.GECU Ransomware Trojans 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 an effect of user ending up on a resource that holds a malicious software program;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the target’s computer or stop the device from operating in an appropriate fashion – while likewise putting a ransom money note that states the demand for the targets to effect the settlement for the function of decrypting the records or restoring the documents system back to the initial condition. In many instances, the ransom note will certainly come up when the client restarts the PC after the system has already been damaged.

Win32/Kryptik.GECU circulation channels.

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

Ransomware injection

For example:

    Faulty signals concerning unlicensed software.

    In particular areas, the Trojans often wrongfully report having found some unlicensed applications enabled on the target’s tool. The alert after that demands the user to pay the ransom money.

    Faulty declarations concerning unlawful web content.

    In countries where software application piracy is less popular, this approach is not as efficient for the cyber scams. Additionally, the Win32/Kryptik.GECU popup alert may falsely declare to be stemming from a law enforcement organization and will report having situated kid porn or other prohibited data on the gadget.

    Win32/Kryptik.GECU popup alert may wrongly claim to be acquiring from a regulation enforcement institution as well as will certainly report having situated child pornography or other prohibited data on the gadget. The alert will in a similar way contain a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: 3F743CF7
md5: a70a6c7740a9bbc1ab262bc3488756d7
name: A70A6C7740A9BBC1AB262BC3488756D7.mlw
sha1: e20ad1ad308be87c73977afe3212cf3934accddc
sha256: 4eee169d001ac654414ce96157559c123bc1fe8d25841450019288c9f78ec9e7
sha512: 996d668240bac00eaa55aeb7077ecf152973343f8c78a21d3fe1fec81d4b60e617e21527a12429e9b849bd91ddc30345a3fd3715dd8462424645d34796990dfb
ssdeep: 6144:sjHZX6q4GOs+I1oRXpEM0clfSZIq8n92JX:QX6q4GO/aclfSZIVn0JX
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GECU also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.Ransom.GandCrab.Gen.2
FireEye Generic.mg.a70a6c7740a9bbc1
CAT-QuickHeal Trojan.Chapak.ZZ5
McAfee Packed-FBN!A70A6C7740A9
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Win.Packed.Gandcrab-6552923-4
CrowdStrike win/malicious_confidence_100% (D)
BitDefender Trojan.Ransom.GandCrab.Gen.2
K7GW Trojan ( 655333331 )
K7AntiVirus Trojan ( 003e58dd1 )
BitDefenderTheta Gen:NN.ZexaF.34590.quX@a4Ob0vfi
Cyren W32/S-d32766fa!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Packed.Gandcrab-6552923-4
Kaspersky HEUR:Trojan-Ransom.Win32.GandCrypt.gen
NANO-Antivirus Trojan.Win32.Upatre.eytaja
ViRobot Trojan.Win32.GandCrab.Gen.A
AegisLab Trojan.Win32.Generic.4!c
Rising Ransom.GandCrab!8.F355 (C64:YzY0OvF53pBjSNmO)
Ad-Aware Trojan.Ransom.GandCrab.Gen.2
Sophos Mal/Generic-R + Mal/Agent-AUL
Comodo TrojWare.Win32.Crypt.KL@7k3dkw
F-Secure Heuristic.HEUR/AGEN.1117310
DrWeb BackDoor.IRC.Bot.4348
Zillya Trojan.Miner.Win32.2850
TrendMicro Ransom.Win32.GANDCRAB.SMLA.hp
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
Emsisoft Trojan.Ransom.GandCrab.Gen.2 (B)
Ikarus Trojan.Kryptik
Jiangmin TrojanDropper.Demp.bdo
Avira HEUR/AGEN.1117310
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft Ransom:Win32/GandCrab.AO
Arcabit Trojan.Ransom.GandCrab.Gen.2
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
ZoneAlarm HEUR:Trojan-Ransom.Win32.GandCrypt.gen
GData Trojan.Ransom.GandCrab.Gen.2
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/Gandcrab.Exp
Acronis suspicious
VBA32 BScope.Trojan.Swrort
ALYac Trojan.Ransom.GandCrab.Gen.2
MAX malware (ai score=100)
Malwarebytes Trojan.MalPack
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.GECU
TrendMicro-HouseCall Ransom.Win32.GANDCRAB.SMLA.hp
Tencent Malware.Win32.Gencirc.10b1cd9d
Yandex Trojan.GenAsa!i3MeoH1+VLI
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_98%
Fortinet W32/GenKryptik.EBES!tr
AVG Win32:Malware-gen
Cybereason malicious.740a9b
Paloalto generic.ml
Qihoo-360 Win32/Trojan.7fb

How to remove Win32/Kryptik.GECU 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.

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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.GECU 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.GECU 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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