Win32/Kryptik.FPUX

Written by Robert Bailey

What is Win32/Kryptik.FPUX infection?

In this short article you will certainly discover regarding the interpretation of Win32/Kryptik.FPUX and its adverse effect on your computer. Such ransomware are a form of malware that is clarified by on-line scams to demand paying the ransom by a victim.

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In the majority of the cases, Win32/Kryptik.FPUX virus will certainly advise its targets to start funds transfer for the function of reducing the effects of the changes that the Trojan infection has presented to the sufferer’s gadget.

Win32/Kryptik.FPUX Summary

These modifications can be as follows:

  • 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.
  • Injection with CreateRemoteThread in a remote process;
  • 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.
  • Mimics the system’s user agent string for its own requests;
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Starts servers listening on 0.0.0.0:19479, :0, 127.0.0.1:26853;
  • 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.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Unconventionial language used in binary resources: Russian;
  • 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;
  • Code injection with CreateRemoteThread in a remote process;
  • Deletes its original binary from disk;
  • Tries to unhook or modify Windows functions monitored by Cuckoo;
  • Steals private information from local Internet browsers;
  • 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
  • Collects information about installed applications;
  • Creates Zeus (Banking Trojan) mutexes;
  • Attempts to modify browser security settings;
  • Harvests credentials from local FTP client softwares;
  • Attempts to interact with an Alternate Data Stream (ADS);
  • Creates a slightly modified copy of itself;
  • 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 documents found on the victim’s hard drive — so the sufferer can no longer make use of the data;
  • Preventing regular access to the target’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.FPUX

The most typical networks where Win32/Kryptik.FPUX Ransomware Trojans are infused are:

  • By means of phishing e-mails;
  • As a consequence of individual ending up on a source that organizes a malicious software application;

As soon as the Trojan is efficiently injected, it will certainly either cipher the information on the sufferer’s PC or prevent the gadget from functioning in an appropriate manner – while also positioning a ransom note that discusses the need for the targets to effect the settlement for the purpose of decrypting the documents or recovering the file system back to the first condition. In the majority of circumstances, the ransom money note will certainly show up when the customer reboots the PC after the system has actually already been harmed.

Win32/Kryptik.FPUX circulation channels.

In different corners of the globe, Win32/Kryptik.FPUX grows by jumps and also bounds. Nonetheless, the ransom notes and also tricks of extorting the ransom money quantity might vary depending upon certain regional (local) settings. The ransom notes and tricks of obtaining the ransom money quantity may vary depending on certain neighborhood (local) setups.

Ransomware injection

For example:

    Faulty alerts concerning unlicensed software application.

    In specific areas, the Trojans often wrongfully report having actually spotted some unlicensed applications allowed on the victim’s tool. The alert after that requires the customer to pay the ransom money.

    Faulty statements about illegal material.

    In countries where software application piracy is much less prominent, this technique is not as effective for the cyber frauds. Additionally, the Win32/Kryptik.FPUX popup alert might wrongly declare to be stemming from a law enforcement establishment and will report having located child porn or various other unlawful data on the device.

    Win32/Kryptik.FPUX popup alert may incorrectly declare to be acquiring from a legislation enforcement organization as well as will report having located child porn or other prohibited data on the gadget. The alert will in a similar way consist of a need for the user to pay the ransom.

Technical details

File Info:

crc32: 249DBE96
md5: 6ba58cff040652909a9aa53e8f66f2ca
name: 6BA58CFF040652909A9AA53E8F66F2CA.mlw
sha1: 738279de40cced85883d83d7ecefcb239d2d085b
sha256: 8f6829a664fd9e9b8a8681929eb146a1f1fb4b1ec496959e107d4ab023dc2c23
sha512: c60dc01c85c8ddcd7273e7903468fcd9edcb105b2a62e2543ee3feff054d8840dc81e09490ca8a34ccf9974fb88b4cd48aedc2d6fc6ab36d5da91be8f4d32f06
ssdeep: 3072:mpF0rjZeO8aX/ilkP9yylliOywiw8cD5+OllhJ0MAh1pEuf:o6ZebGP9yn5f655llhJah1Vf
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

FileVersion: 16.95.693.83
FileDescription: vxF
ProductVersion: 16.95.693.83
OriginalFilename: hCF0aUiL4YsFc2LoXDv1JPnj3dlLeOhRBYrsR4Mqlv.exe
ProductName: qKDtKAI8IYuwtMaPEOitreACOAEjD2Qe
Translation: 0x0409 0x04b0

Win32/Kryptik.FPUX also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.PWS.Panda.2005
ALYac Trojan.Ransom.Cerber.1
Cylance Unsafe
Zillya Trojan.Zbot.Win32.81377
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba TrojanPSW:Win32/Kryptik.0287024b
K7GW Riskware ( 0015e4f11 )
K7AntiVirus Riskware ( 0015e4f11 )
Cyren W32/Zbot.QG.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.FPUX
APEX Malicious
Avast Win32:Susn-AR [Trj]
Cynet Malicious (score: 100)
Kaspersky UDS:Trojan-Spy.Win32.Zbot.sb
BitDefender Trojan.Ransom.Cerber.1
NANO-Antivirus Trojan.Win32.Crypted.bbdtse
MicroWorld-eScan Trojan.Ransom.Cerber.1
Tencent Win32.Trojan-Spy.Zbot.botx
Ad-Aware Trojan.Ransom.Cerber.1
Sophos ML/PE-A + Mal/EncPk-AGT
Comodo Malware@#2of7wvb82p64s
BitDefenderTheta AI:Packer.38060EF920
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition PWS-Zbot.gen.ame
FireEye Generic.mg.6ba58cff04065290
Emsisoft Trojan.Ransom.Cerber.1 (B)
SentinelOne Static AI – Malicious PE
Jiangmin TrojanSpy.Zbot.cicd
Webroot W32.Infostealer.Zeus
Avira TR/Crypt.XPACK.Gen7
eGambit Generic.Malware
Microsoft PWS:Win32/Zbot!CI
Arcabit Trojan.Ransom.Cerber.1
AegisLab Trojan.Win32.Zbot.lx9X
GData Trojan.Ransom.Cerber.1
TACHYON Trojan-Spy/W32.ZBot.150016.BG
AhnLab-V3 Spyware/Win32.Zbot.R34880
Acronis suspicious
McAfee PWS-Zbot.gen.ame
MAX malware (ai score=99)
VBA32 BScope.TrojanPSW.Panda
Malwarebytes MachineLearning/Anomalous.100%
Panda Trj/Genetic.gen
Rising Trojan.Win32.Generic.1350E473 (C64:YzY0OkLhHi2TK6U8)
Yandex Trojan.Kryptik!EpFI3D8QUJ0
Ikarus Trojan-Spy.Win32.Zbot
Fortinet W32/Zbot.ASJ!tr
AVG Win32:Susn-AR [Trj]
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Cerber.HwcBEpsA

How to remove Win32/Kryptik.FPUX ransomware?

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.FPUX 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Win32/Kryptik.FPUX 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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