Win32/Kryptik.DUKO

Written by Robert Bailey

What is Win32/Kryptik.DUKO infection?

In this article you will find regarding the meaning of Win32/Kryptik.DUKO and its adverse effect on your computer system. Such ransomware are a type of malware that is specified by online scams to require paying the ransom money by a victim.

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Most of the instances, Win32/Kryptik.DUKO infection will certainly advise its sufferers to initiate funds move for the function of counteracting the changes that the Trojan infection has introduced to the victim’s device.

Win32/Kryptik.DUKO Summary

These modifications 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.
  • Compression (or decompression);
  • 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.

  • A process created a hidden window;
  • Unconventionial language used in binary resources: Mongolian;
  • Uses Windows utilities for basic functionality;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Attempts to delete volume shadow copies;
  • Exhibits behavior characteristic of Alphacrypt/Teslacrypt ransomware;
  • 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 contains more than one unique useragent.;
  • 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
  • Writes a potential ransom message to disk;
  • Creates a known TeslaCrypt/AlphaCrypt ransomware decryption instruction / key file.;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers located on the target’s disk drive — so the victim can no longer use 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.DUKO

The most common channels through which Win32/Kryptik.DUKO Ransomware Trojans are infused are:

  • By means of phishing e-mails;
  • As a repercussion of individual ending up on a resource that holds a destructive software;

As quickly as the Trojan is effectively infused, it will either cipher the information on the sufferer’s computer or stop the tool from operating in a correct fashion – while additionally putting a ransom note that states the demand for the victims to impact the settlement for the function of decrypting the papers or recovering the documents system back to the preliminary condition. In most circumstances, the ransom money note will show up when the customer restarts the COMPUTER after the system has currently been damaged.

Win32/Kryptik.DUKO circulation channels.

In different corners of the world, Win32/Kryptik.DUKO grows by jumps as well as bounds. However, the ransom money notes and techniques of extorting the ransom money quantity may vary depending on certain neighborhood (local) settings. The ransom notes and methods of extorting the ransom quantity may differ depending on specific regional (regional) setups.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In particular locations, the Trojans often wrongfully report having detected some unlicensed applications allowed on the sufferer’s gadget. The sharp after that requires the customer to pay the ransom.

    Faulty statements regarding unlawful material.

    In nations where software program piracy is less preferred, this method is not as reliable for the cyber scams. Conversely, the Win32/Kryptik.DUKO popup alert may falsely assert to be deriving from a police organization as well as will report having situated youngster pornography or other prohibited information on the gadget.

    Win32/Kryptik.DUKO popup alert might wrongly declare to be deriving from a legislation enforcement institution and will report having located child pornography or various other prohibited information on the tool. The alert will similarly consist of a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 348F2BA1
md5: 7b2bab3c484adee7ed99f66ac88abfaf
name: 7B2BAB3C484ADEE7ED99F66AC88ABFAF.mlw
sha1: d68d6777a41c1a1ebaa06bf1cecc2a95617c0040
sha256: 8f31a3459b68a7a6af5ae839946c5e97bd6f5e9a0e2fe6bf08caa225c9bab529
sha512: 51d6d5b75c962e688f02e76086ce83eff5ff691578f53724f6a1afba09c562ed1a96fbee3d01113a5e9feb7816ef230d6c4ed702ca1b31b9a420f093c5af4f59
ssdeep: 6144:DzvYORUsy0ay+jgLuKVZnhjbwsKmlGFYUhhKZsyV:Y/sye1XprRlGZhhgj
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Authenticity xa9 2054
InternalName: Axed
FileVersion: 65, 152, 71, 204
CompanyName: Generic Provider
ProductName: Alarmed Climate
FileDescription: Dissect
OriginalFilename: Baccarat.exe

Win32/Kryptik.DUKO also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004d41c61 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader15.57608
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.TeslaCrypt.WR4
Cylance Unsafe
Zillya Trojan.Bitman.Win32.346
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Tescrypt.a0ab6dcc
K7GW Trojan ( 004d41c61 )
Cybereason malicious.c484ad
ESET-NOD32 a variant of Win32/Kryptik.DUKO
APEX Malicious
Avast Win32:TeslaCrypt-DH [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.Cripack.Gen.1
NANO-Antivirus Trojan.Win32.Bitman.dvrqnp
ViRobot Trojan.Win32.U.Agent.325883
MicroWorld-eScan Trojan.Cripack.Gen.1
Tencent Malware.Win32.Gencirc.114c7b40
Ad-Aware Trojan.Cripack.Gen.1
Sophos ML/PE-A + Mal/Tinba-L
Comodo TrojWare.Win32.TrojanDownloader.Upatre.EBO@5zjcok
BitDefenderTheta Gen:NN.ZexaF.34628.tq3@aquHYzbG
VIPRE Trojan.Win32.Generic!BT
TrendMicro Cryp_HpMyApp
McAfee-GW-Edition TeslaCrypt!7B2BAB3C484A
FireEye Generic.mg.7b2bab3c484adee7
Emsisoft Trojan.Cripack.Gen.1 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/Bitman.gl
Webroot Trojan.Dropper.Gen
Avira HEUR/AGEN.1124206
Kingsoft Win32.Troj.GenericKD.v.(kcloud)
Microsoft Ransom:Win32/Tescrypt.C
GData Trojan.Cripack.Gen.1
AhnLab-V3 Win-Trojan/Lockycrypt.Gen
McAfee TeslaCrypt!7B2BAB3C484A
MAX malware (ai score=100)
VBA32 Hoax.Bitman
Malwarebytes Trojan.Agent.QDD
Panda Trj/Genetic.gen
TrendMicro-HouseCall Cryp_HpMyApp
Rising Trojan.Ransom-Tesla!8.2B62 (CLOUD)
Yandex Trojan.GenAsa!u5bLXszHzf4
Ikarus Trojan.Win32.Crypt
Fortinet W32/Papras.EH!tr
AVG Win32:TeslaCrypt-DH [Trj]
Qihoo-360 Win32/Ransom.Tescrypt.HwcBevkA

How to remove Win32/Kryptik.DUKO 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.DUKO 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.DUKO 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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