Win32/Kryptik.GFDO

What is Win32/Kryptik.GFDO infection?

In this post you will discover concerning the interpretation of Win32/Kryptik.GFDO and its unfavorable impact on your computer. Such ransomware are a kind of malware that is elaborated by on the internet fraudulences to require paying the ransom money by a target.

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Most of the situations, Win32/Kryptik.GFDO infection will instruct its targets to start funds transfer for the objective of reducing the effects of the amendments that the Trojan infection has actually presented to the target’s gadget.

Win32/Kryptik.GFDO Summary

These alterations 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.
  • 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.
  • 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
  • Attempts to identify installed AV products by installation directory;
  • 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;
  • Creates a slightly modified copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers found on the target’s hard drive — so the target can no longer utilize the information;
  • Preventing regular 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.

Win32/Kryptik.GFDO

One of the most normal channels whereby Win32/Kryptik.GFDO are infused are:

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

As soon as the Trojan is efficiently infused, it will either cipher the data on the target’s computer or protect against the tool from working in a correct fashion – while likewise putting a ransom money note that points out the demand for the targets to impact the repayment for the objective of decrypting the papers or restoring the data system back to the preliminary problem. In many circumstances, the ransom money note will turn up when the customer reboots the PC after the system has currently been harmed.

Win32/Kryptik.GFDO distribution channels.

In various corners of the world, Win32/Kryptik.GFDO expands by leaps and also bounds. Nonetheless, the ransom notes and also techniques of extorting the ransom quantity may differ depending upon certain local (local) setups. The ransom notes and also methods of extorting the ransom amount might differ depending on certain local (regional) settings.

Ransomware injection

For example:

    Faulty notifies about unlicensed software program.

    In particular areas, the Trojans usually wrongfully report having identified some unlicensed applications enabled on the sufferer’s device. The alert then demands the individual to pay the ransom money.

    Faulty declarations regarding prohibited web content.

    In countries where software program piracy is less prominent, this method is not as reliable for the cyber scams. Alternatively, the Win32/Kryptik.GFDO popup alert may wrongly declare to be deriving from a police institution and will report having located youngster porn or various other prohibited information on the tool.

    Win32/Kryptik.GFDO popup alert might wrongly claim to be obtaining from a regulation enforcement organization and will report having situated kid pornography or other illegal information on the gadget. The alert will likewise contain a demand for the user to pay the ransom.

Technical details

File Info:

crc32: C9D94352
md5: 3e92d14e03730dcb8001dc5da1d85367
name: 3E92D14E03730DCB8001DC5DA1D85367.mlw
sha1: d1e36124365bd2280806f925aca149ed2dccefb9
sha256: 7dab6ea425daec2a62622da584693225ff9072128e2bbdb5ede7efc7d836b6e3
sha512: 1706896fabb29e403341b0acf406a6e3bd5cee020af23d7ae5032d8f6c54112e80826428d169a0b1feb2d5215930b2829f31c574c1b361489ae51d82f9337a25
ssdeep: 3072:L+HcL2LCfIfPQ+kS62FxyjEoZ/+5l7Vjp9:yzfvkSjx4EQ/+Np9
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GFDO also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 00529a891 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.24384
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Mauvaise.SL1
ALYac Trojan.Mint.Zamg.C
Cylance Unsafe
Zillya Trojan.Chapak.Win32.3596
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Trojan:Win32/Chapak.6bf30ed0
K7GW Trojan ( 00529a891 )
Cybereason malicious.e03730
Cyren W32/S-ece8767d!Eldorado
Symantec Packed.Generic.527
ESET-NOD32 a variant of Win32/Kryptik.GFDO
APEX Malicious
Avast Win32:RansomX-gen [Ransom]
ClamAV Win.Malware.Gandcrab-6898314-0
Kaspersky Trojan.Win32.Chapak.rkv
BitDefender Trojan.Mint.Zamg.C
NANO-Antivirus Trojan.Win32.Encoder.faionq
MicroWorld-eScan Trojan.Mint.Zamg.C
Tencent Malware.Win32.Gencirc.10b0cbc1
Ad-Aware Trojan.Mint.Zamg.C
Comodo TrojWare.Win32.GandCrab.AG@7nb7e4
BitDefenderTheta AI:Packer.0F928D511E
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_GANDCRAB-SMALY
McAfee-GW-Edition BehavesLike.Win32.Generic.cc
FireEye Generic.mg.3e92d14e03730dcb
Emsisoft Trojan.Mint.Zamg.C (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Chapak.gk
Avira HEUR/AGEN.1106535
eGambit Trojan.Generic
Microsoft Ransom:Win32/GandCrab.AE
AegisLab Trojan.Win32.Chapak.tpTz
GData Trojan.Mint.Zamg.C
TACHYON Trojan/W32.Chapak.146432
AhnLab-V3 Malware/Win32.Generic.C2472080
Acronis suspicious
McAfee GenericRXEY-TK!3E92D14E0373
MAX malware (ai score=87)
VBA32 BScope.Trojan.Chapak
Malwarebytes Ransom.GandCrab
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_GANDCRAB-SMALY
Rising Ransom.GandCrab!8.F355 (CLOUD)
Ikarus Trojan-Ransom.GandCrab
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/GandCrab.C!tr
AVG Win32:RansomX-gen [Ransom]
Paloalto generic.ml
Qihoo-360 Win32/Ransom.GandCrab.HwoCdr8A

How to remove Win32/Kryptik.GFDO 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.GFDO 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.GFDO 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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