Win32/Kryptik.GFRI

Written by Robert Bailey

What is Win32/Kryptik.GFRI infection?

In this post you will discover regarding the meaning of Win32/Kryptik.GFRI and also its unfavorable effect on your computer system. Such ransomware are a form of malware that is elaborated by on the internet fraudulences to demand paying the ransom money by a target.

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In the majority of the instances, Win32/Kryptik.GFRI ransomware will certainly instruct its targets to launch funds transfer for the function of neutralizing the modifications that the Trojan infection has actually introduced to the target’s tool.

Win32/Kryptik.GFRI 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.

  • 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;
  • 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 files located on the target’s hard drive — so the victim can no longer use the information;
  • Preventing regular accessibility to the target’s workstation;

Win32/Kryptik.GFRI

One of the most regular channels where Win32/Kryptik.GFRI are infused 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 user winding up on a source that hosts a malicious software program;

As soon as the Trojan is effectively injected, it will either cipher the data on the sufferer’s PC or protect against the gadget from functioning in a correct fashion – while also putting a ransom money note that mentions the need for the sufferers to impact the payment for the function of decrypting the files or recovering the file system back to the first condition. In most circumstances, the ransom note will certainly show up when the customer reboots the COMPUTER after the system has already been damaged.

Win32/Kryptik.GFRI distribution networks.

In numerous corners of the world, Win32/Kryptik.GFRI expands by leaps and bounds. However, the ransom notes and also methods of obtaining the ransom money quantity might vary relying on specific neighborhood (local) settings. The ransom money notes and techniques of extorting the ransom quantity might vary depending on particular neighborhood (local) setups.

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software.

    In particular areas, the Trojans frequently wrongfully report having spotted some unlicensed applications enabled on the victim’s gadget. The alert then demands the customer to pay the ransom.

    Faulty statements regarding illegal material.

    In nations where software piracy is less prominent, this method is not as reliable for the cyber scams. Conversely, the Win32/Kryptik.GFRI popup alert may falsely assert to be originating from a law enforcement establishment and will report having located youngster porn or various other unlawful data on the tool.

    Win32/Kryptik.GFRI popup alert might wrongly claim to be obtaining from a law enforcement institution as well as will certainly report having located child pornography or other illegal data on the gadget. The alert will in a similar way consist of a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 57B0C6BD
md5: aa22557c3bd71b973cad3a8ccb597460
name: AA22557C3BD71B973CAD3A8CCB597460.mlw
sha1: 0274ae46033e5c3d73d82b57e1d237609b2e4482
sha256: 911600814f7582d739ebff8e147eb362e8a848832a9f26724e29857ccd499c16
sha512: 3e89dbdfe675f232deb82950053de946d66f7e530f70ce5317703a374123e96fe33dfe0e35ebb8617e89940e9d2751ccc12bdbb4e639c3c65fbb0133deff3bc0
ssdeep: 3072:I1GX72yUrCvyL4QVgYdVFB56cN0wg817VgDfNG1Pv5VRsdV3e8LS3u02ODSpp:uGr2yUm5Sz35dg81huG15eBLnzz
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GFRI also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 003e58dd1 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.24384
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Chapak.ZZ5
ALYac Trojan.Ransom.GandCrab.Gen.2
Cylance Unsafe
Zillya Trojan.Chapak.Win32.2969
Sangfor Win.Packed.Gandcrab-6552923-4
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 003e58dd1 )
Cybereason malicious.c3bd71
Cyren W32/S-1f5dd279!Eldorado
Symantec Packed.Generic.525
ESET-NOD32 a variant of Win32/Kryptik.GFRI
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Packed.Gandcrab-6552923-4
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.Ransom.GandCrab.Gen.2
NANO-Antivirus Trojan.Win32.Chapak.fahzzs
ViRobot Trojan.Win32.GandCrab.Gen.A
MicroWorld-eScan Trojan.Ransom.GandCrab.Gen.2
Tencent Malware.Win32.Gencirc.10c8d1eb
Ad-Aware Trojan.Ransom.GandCrab.Gen.2
Sophos ML/PE-A + Mal/Agent-AUL
Comodo TrojWare.Win32.Chapak.BD@7m1jh2
BitDefenderTheta Gen:NN.ZexaF.34678.muX@aGyOH9b
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_GANDCRAB.THDBOAH
McAfee-GW-Edition BehavesLike.Win32.Generic.dh
FireEye Generic.mg.aa22557c3bd71b97
Emsisoft Trojan.Ransom.GandCrab.Gen.2 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Chapak.gs
Avira HEUR/AGEN.1126869
eGambit Unsafe.AI_Score_85%
Microsoft VirTool:Win32/CeeInject.ACA!bit
AegisLab Trojan.Win32.Chapak.4!c
GData Win32.Trojan-Ransom.GandCrab.U
AhnLab-V3 Win-Trojan/Gandcrab.Exp
Acronis suspicious
McAfee GenericRXEX-AJ!AA22557C3BD7
MAX malware (ai score=99)
VBA32 BScope.Trojan.Chapak
Malwarebytes Trojan.MalPack.GS
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_GANDCRAB.THDBOAH
Rising Trojan.Kryptik!8.8 (CLOUD)
Yandex Trojan.GenAsa!qM/oNaCsajU
Ikarus Trojan.Win32.Crypt
MaxSecure Ransomeware.GandCrypt.Gen
Fortinet W32/GenKryptik.DQHN!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Win32/Kryptik.GFRI 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.GFRI 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.GFRI 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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