Win32/Kryptik.GCUU

What is Win32/Kryptik.GCUU infection?

In this short article you will certainly find about the interpretation of Win32/Kryptik.GCUU and also its unfavorable impact on your computer. Such ransomware are a kind of malware that is specified by online frauds to demand paying the ransom money by a victim.

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In the majority of the instances, Win32/Kryptik.GCUU ransomware will advise its victims to start funds transfer for the objective of reducing the effects of the modifications that the Trojan infection has actually presented to the victim’s gadget.

Win32/Kryptik.GCUU Summary

These adjustments 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Attempts to remove evidence of file being downloaded from the Internet;
  • 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!
  • 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
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Operates on local firewall’s policies and settings;
  • Ciphering the papers located on the victim’s hard disk — so the target can no longer utilize the information;
  • 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.GCUU

One of the most regular channels where Win32/Kryptik.GCUU Ransomware are injected are:

  • By ways of phishing e-mails;
  • As a consequence of user ending up on a source that organizes a destructive software program;

As soon as the Trojan is effectively infused, it will either cipher the information on the victim’s PC or prevent the device from functioning in an appropriate manner – while likewise putting a ransom note that states the need for the targets to effect the settlement for the objective of decrypting the records or recovering the documents system back to the first problem. In a lot of instances, the ransom note will turn up when the client reboots the COMPUTER after the system has actually currently been harmed.

Win32/Kryptik.GCUU distribution networks.

In various edges of the world, Win32/Kryptik.GCUU expands by leaps as well as bounds. However, the ransom money notes as well as techniques of extorting the ransom money quantity might differ depending on particular regional (local) settings. The ransom notes and tricks of obtaining the ransom quantity may vary depending on certain regional (local) setups.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software application.

    In particular locations, the Trojans usually wrongfully report having found some unlicensed applications allowed on the sufferer’s gadget. The alert after that requires the individual to pay the ransom money.

    Faulty statements concerning unlawful content.

    In countries where software piracy is much less popular, this technique is not as efficient for the cyber fraudulences. Conversely, the Win32/Kryptik.GCUU popup alert might incorrectly declare to be originating from a police organization and also will report having situated kid porn or other illegal information on the device.

    Win32/Kryptik.GCUU popup alert might incorrectly declare to be obtaining from a law enforcement institution and will certainly report having situated child porn or other illegal data on the tool. The alert will in a similar way have a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 6C4C0ACB
md5: f10e3c52d6f40aa25cb2bb81e900543f
name: F10E3C52D6F40AA25CB2BB81E900543F.mlw
sha1: a416ccc6e7d4f1358ab0707ed009ee1c893576e0
sha256: 8182dbbfb51d205b34f208a7ac328ff34c6d85ed4b7b4dfde91fc766a0834993
sha512: 14defb1707fd66e2f407af418e00f76e86c4e39b8d1692bd9726490570ed87f6a9d1c66774e28cc214200fdf6566375d2eaebc829ce4ce7e1901e47f0ce18ff9
ssdeep: 1536:JgB1tyMD2U5YLiJh0rMQDcOnmtfyu/fqf7gnWQXAKquK7Bf5wHbj3yDv8dZ8w4j:Jwtyr7iJh0r9D8AP+XAKquY5s/CbmP
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GCUU also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0053305e1 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.24496
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Mauvaise.SL1
ALYac Trojan.GenericKDZ.42025
Cylance Unsafe
Zillya Trojan.Generic.Win32.360875
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Trojan:Win32/Starter.ali2000005
K7GW Trojan ( 0053305e1 )
Cybereason malicious.2d6f40
Cyren W32/S-c5d37cab!Eldorado
Symantec Trojan.Wortrik
ESET-NOD32 a variant of Win32/Kryptik.GCUU
APEX Malicious
Avast Win32:Dropper-gen [Drp]
ClamAV Win.Ransomware.Neutrinopos-9845680-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.GenericKDZ.42025
NANO-Antivirus Trojan.Win32.NeutrinoPOS.exsysr
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
MicroWorld-eScan Trojan.GenericKDZ.42025
Tencent Trojan.Win32.Gandcrypt.b
Ad-Aware Trojan.GenericKDZ.42025
Sophos Mal/Generic-R + Mal/Ransom-FN
Comodo TrojWare.Win32.Occamy.A@7ijixk
BitDefenderTheta Gen:NN.ZexaF.34628.juW@ainqhll
VIPRE Backdoor.IRCBot
TrendMicro Ransom_HPGANDCRAB.SMONT
McAfee-GW-Edition BehavesLike.Win32.Generic.ch
FireEye Generic.mg.f10e3c52d6f40aa2
Emsisoft Trojan.GenericKDZ.42025 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.Miner.bgf
Avira HEUR/AGEN.1126869
eGambit Unsafe.AI_Score_98%
Kingsoft Win32.Troj.Banker.(kcloud)
Microsoft Backdoor:Win32/Kirts.A
Arcabit Trojan.Generic.DA429
AegisLab Trojan.Win32.Miner.tphn
GData Win32.Trojan-Ransom.GandCrab.O
TACHYON Trojan/W32.IRCBot.149504
AhnLab-V3 Trojan/Win.MalPe.X2055
Acronis suspicious
McAfee Packed-ZG!F10E3C52D6F4
MAX malware (ai score=99)
VBA32 TrojanBanker.NeutrinoPOS
Malwarebytes Trojan.Bunitu
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_HPGANDCRAB.SMONT
Rising Trojan.Ransom.GlobeImposter!1.AF70 (CLOUD)
Ikarus Trojan.Crypt
Fortinet W32/GenKryptik.BAZY!tr
AVG Win32:Dropper-gen [Drp]
Paloalto generic.ml
Qihoo-360 Win32/TrojanDropper.Generic.HwoCeAUB

How to remove Win32/Kryptik.GCUU 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.GCUU 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.GCUU 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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