Win32/Kryptik.FOUF

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

What is Win32/Kryptik.FOUF infection?

In this post you will certainly locate about the interpretation of Win32/Kryptik.FOUF and its adverse impact on your computer system. Such ransomware are a kind of malware that is specified by on the internet fraudulences to require paying the ransom money by a target.

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Most of the instances, Win32/Kryptik.FOUF infection will instruct its victims to start funds move for the objective of counteracting the modifications that the Trojan infection has actually introduced to the target’s gadget.

Win32/Kryptik.FOUF 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.
  • Attempts to connect to a dead IP:Port (4 unique times);
  • 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.
  • A process attempted to delay the analysis task.;
  • 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.

  • Creates an excessive number of UDP connection attempts to external IP addresses;
  • 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.
  • Attempts to modify desktop wallpaper;
  • Exhibits behavior characteristic of Cerber ransomware;
  • Attempts to execute a binary from a dead or sinkholed URL;
  • EternalBlue behavior. Allows cyber threat actors to remotely execute arbitrary code and gain access to a network by sending specially crafted packets.

    This is has made EternalBlue trick popular with various malware, such as Trickbot, a modular banking trojan, as well as CoinMiner and WannaMine, crypto miners that use the EternalBlue exploit in order to gain access to computing power to mine cryptocurrencies.

  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Attempts to access Bitcoin/ALTCoin wallets;
  • Generates some ICMP traffic;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Ciphering the files located on the victim’s disk drive — so the target can no more use the data;
  • Preventing regular accessibility to the target’s workstation;
Similar behavior
Related domains
api.blockcypher.com Ransom.Cerber.A4
btc.blockr.io Ransom.Cerber.A4
bitaps.com Ransom.Cerber.A4
chain.so Ransom.Cerber.A4
ocsp.digicert.com Ransom.Cerber.A4
xxxxxxxxxxxxxxxx.1lseoi.top Ransom.Cerber.A4

Win32/Kryptik.FOUF

The most regular channels where Win32/Kryptik.FOUF are injected are:

  • By ways of phishing e-mails;
  • As an effect of user winding up on a resource that hosts a harmful software application;

As quickly as the Trojan is successfully injected, it will certainly either cipher the information on the victim’s PC or stop the device from working in an appropriate manner – while additionally positioning a ransom note that mentions the need for the sufferers to effect the settlement for the function of decrypting the documents or bring back the file system back to the preliminary condition. In the majority of circumstances, the ransom money note will certainly come up when the client restarts the PC after the system has actually currently been harmed.

Win32/Kryptik.FOUF circulation networks.

In numerous corners of the globe, Win32/Kryptik.FOUF grows by leaps and bounds. Nevertheless, the ransom notes as well as techniques of obtaining the ransom quantity might differ depending on specific regional (local) settings. The ransom money notes and also techniques of obtaining the ransom money quantity may vary depending on particular regional (regional) settings.

Ransomware injection

For instance:

    Faulty alerts about unlicensed software.

    In specific locations, the Trojans usually wrongfully report having actually found some unlicensed applications allowed on the sufferer’s device. The sharp then demands the customer to pay the ransom.

    Faulty statements regarding unlawful content.

    In countries where software program piracy is less popular, this technique is not as effective for the cyber scams. Additionally, the Win32/Kryptik.FOUF popup alert might incorrectly assert to be deriving from a law enforcement organization and will report having located youngster pornography or various other illegal information on the tool.

    Win32/Kryptik.FOUF popup alert may wrongly assert to be acquiring from a legislation enforcement establishment as well as will certainly report having situated child porn or various other illegal data on the device. The alert will likewise consist of a need for the customer to pay the ransom.

Technical details

File Info:

crc32: 8C9BAE62
md5: b2ada5595d97aae3a4a5bcb4f3191988
name: B2ADA5595D97AAE3A4A5BCB4F3191988.mlw
sha1: cb2cdd36842dc60e6024ab7cefa76333d2d9e8a3
sha256: b1945a635cf8aa7938f7efc9fd92947cb8c6b084017951eecef4beb07bd684da
sha512: 48ca71cfd96e59be72f79afa29225c9672ae6b0ab219ff148a25623490bdd5ec2278d7ed2cbcfc9e3a9ba84f1898701e6155097216ccbaf539fbdf5ec3d8462d
ssdeep: 12288:1kzrVi1vWUDMUff5FeQetmvNX7tJbrUtp:1uVzUjZFNewJbop
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

FileDescription: Total Commander 32bit->64bit helper tool
CompanyName: Ghisler Software GmbH
Translation: 0x0409 0x0000

Win32/Kryptik.FOUF also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 005224381 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.10390
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.Cerber.A4
ALYac Gen:Variant.Zusy.319467
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Cerber.ali1020013
K7GW Trojan ( 0050692a1 )
Cybereason malicious.95d97a
Baidu Win32.Trojan.Kryptik.ayf
Cyren W32/S-3ab36953!Eldorado
ESET-NOD32 a variant of Win32/Kryptik.FOUF
APEX Malicious
Avast Win32:MalwareX-gen [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Zusy.319467
NANO-Antivirus Trojan.Win32.Zerber.elznej
MicroWorld-eScan Gen:Variant.Zusy.319467
Tencent Malware.Win32.Gencirc.10b24f21
Ad-Aware Gen:Variant.Zusy.319467
Sophos ML/PE-A + Mal/Cerber-B
Comodo TrojWare.Win32.TrojanProxy.Bunitu.BT@72fovx
BitDefenderTheta Gen:NN.ZexaF.34686.Lq1@aqCedEz
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_HPCERBER.SMALY5A
McAfee-GW-Edition BehavesLike.Win32.Adware.jh
FireEye Generic.mg.b2ada5595d97aae3
Emsisoft Gen:Variant.Zusy.319467 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Zerber.aus
Webroot W32.Adware.Installcore
Avira TR/Crypt.XPACK.Gen7
Microsoft Ransom:Win32/Cerber
AegisLab Trojan.Win32.Generic.4!c
GData Gen:Variant.Zusy.319467
AhnLab-V3 Win-Trojan/Cerber.Gen
Acronis suspicious
McAfee Ransomware-CBER!B2ADA5595D97
MAX malware (ai score=99)
VBA32 BScope.Backdoor.Vawtrak
Malwarebytes Cerber.Ransom.Encrypt.DDS
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_HPCERBER.SMALY5A
Rising Trojan.Kryptik!1.A7BF (CLOUD)
Yandex Trojan.GenAsa!O1hk0Lh0jcc
Ikarus Trojan.Crypt
Fortinet W32/Kryptik.HGZD!tr
AVG Win32:MalwareX-gen [Trj]
Paloalto generic.ml

How to remove Win32/Kryptik.FOUF 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.FOUF 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.FOUF 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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