Win32/Kryptik.GEXF

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

What is Win32/Kryptik.GEXF infection?

In this short article you will find about the meaning of Win32/Kryptik.GEXF as well as its negative effect on your computer system. Such ransomware are a form of malware that is specified by on-line frauds to demand paying the ransom money by a sufferer.

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In the majority of the cases, Win32/Kryptik.GEXF ransomware will advise its targets to start funds transfer for the function of neutralizing the changes that the Trojan infection has presented to the target’s device.

Win32/Kryptik.GEXF Summary

These modifications 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.
  • 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.
  • 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 repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • 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 drive — so the sufferer can no longer make use of the information;
  • Preventing routine accessibility 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.

Win32/Kryptik.GEXF

The most regular networks where Win32/Kryptik.GEXF Ransomware are injected are:

  • By ways of phishing e-mails;
  • As a consequence of customer winding up on a source that organizes a destructive software application;

As soon as the Trojan is successfully infused, it will either cipher the data on the target’s PC or stop the gadget from working in an appropriate fashion – while likewise positioning a ransom money note that points out the demand for the sufferers to impact the repayment for the function of decrypting the records or recovering the data system back to the preliminary condition. In many instances, the ransom note will certainly come up when the customer restarts the PC after the system has actually already been damaged.

Win32/Kryptik.GEXF distribution channels.

In various edges of the world, Win32/Kryptik.GEXF grows by leaps and also bounds. However, the ransom money notes as well as techniques of extorting the ransom amount might differ depending on certain regional (regional) settings. The ransom notes and methods of extorting the ransom money amount might vary depending on particular neighborhood (local) setups.

Ransomware injection

As an example:

    Faulty notifies regarding unlicensed software.

    In certain areas, the Trojans typically wrongfully report having spotted some unlicensed applications made it possible for on the target’s tool. The sharp then demands the customer to pay the ransom money.

    Faulty declarations concerning prohibited material.

    In nations where software application piracy is less popular, this technique is not as reliable for the cyber scams. Conversely, the Win32/Kryptik.GEXF popup alert may wrongly assert to be deriving from a police institution and also will report having situated kid pornography or other unlawful information on the gadget.

    Win32/Kryptik.GEXF popup alert may wrongly declare to be obtaining from a legislation enforcement establishment and also will certainly report having located child pornography or various other unlawful data on the gadget. The alert will in a similar way have a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: E7873605
md5: 4e75405d43a4d87ef29d5d8f5205d21b
name: 4E75405D43A4D87EF29D5D8F5205D21B.mlw
sha1: 02c5a7e8400692227118ab39837b863418139a63
sha256: 4fe700c048b708d873aebcba703f621e66d9d9ae2294aaf0e563c08c5557da34
sha512: fbfb90d80275a4fcf32254376f8e81b1ecd857f4d526caaa2ab39ecfe3a73216b32c0ad0af34800ed6f45ae07b4e964e9367040c63642645efe630c94b561a0a
ssdeep: 3072:PUS0jnJE35tqKsxb7/rXy0kcWnLrcKekI81eUZ9gLwCkZWVtiUMKXoPLRJ:PU235UFDaLrNeoYHkZev9XodJ
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GEXF 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.4e75405d43a4d87e
CAT-QuickHeal Trojan.Chapak.ZZ6
McAfee Packed-FCN!4E75405D43A4
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Chapak.4!c
Sangfor Win.Packed.Gandcrab-6552923-4
K7AntiVirus Trojan ( 0052908c1 )
BitDefender Trojan.Ransom.GandCrab.Gen.2
K7GW Trojan ( 0052908c1 )
Cybereason malicious.d43a4d
Cyren W32/S-e61b09f6!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Packed.Gandcrab-6552923-4
Kaspersky HEUR:Trojan.Win32.Generic
NANO-Antivirus Trojan.Win32.Chapak.ezemry
ViRobot Trojan.Win32.GandCrab.Gen.A
Rising Trojan.Kryptik!8.8 (TFE:5:OYFhQJ4cg5E)
Ad-Aware Trojan.Ransom.GandCrab.Gen.2
Emsisoft Trojan.Ransom.GandCrab.Gen.2 (B)
Comodo TrojWare.Win32.Chapak.I@7ku20v
F-Secure Heuristic.HEUR/AGEN.1121527
DrWeb Trojan.PWS.Banker1.27051
Zillya Trojan.Chapak.Win32.1843
TrendMicro Ransom_GANDCRAB.THDOCAH
McAfee-GW-Edition BehavesLike.Win32.Generic.fc
Sophos Mal/Generic-S + Mal/Agent-AUL
SentinelOne Static AI – Malicious PE
GData Trojan.Ransom.GandCrab.Gen.2
Jiangmin Trojan.Chapak.cx
Avira HEUR/AGEN.1121527
MAX malware (ai score=99)
Antiy-AVL Trojan/Win32.Chapak
Arcabit Trojan.Ransom.GandCrab.Gen.2
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
ZoneAlarm HEUR:Trojan.Win32.Generic
Microsoft Ransom:Win32/Gandcrab.E!MTB
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/Gandcrab.Exp
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34590.tuX@aup@Ubpi
ALYac Trojan.Ransom.GandCrab.Gen.2
TACHYON Trojan/W32.Chapak.314888
VBA32 BScope.Trojan.Chapak
Malwarebytes Trojan.MalPack
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.GEXF
TrendMicro-HouseCall Ransom_GANDCRAB.THDOCAH
Tencent Malware.Win32.Gencirc.10b20850
Yandex Trojan.GenAsa!ci2o1yu8pRc
Ikarus Trojan.Win32.CoinMiner
Fortinet W32/GenKryptik.DWPH!tr
AVG Win32:Malware-gen
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.224

How to remove Win32/Kryptik.GEXF ransomware?

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.GEXF 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.GEXF 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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