Win32/Kryptik.GCGO

Written by Robert Bailey

What is Win32/Kryptik.GCGO infection?

In this article you will certainly locate concerning the definition of Win32/Kryptik.GCGO and also its adverse influence on your computer system. Such ransomware are a type of malware that is clarified by on the internet scams to demand paying the ransom money by a target.

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In the majority of the situations, Win32/Kryptik.GCGO infection will certainly advise its victims to initiate funds transfer for the purpose of reducing the effects of the changes that the Trojan infection has introduced to the victim’s gadget.

Win32/Kryptik.GCGO Summary

These alterations 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.
  • 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.

  • Unconventionial language used in binary resources: Czech;
  • 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 delete volume shadow copies;
  • 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 copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the documents located on the victim’s hard disk drive — so the target can no longer utilize the data;
  • 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.GCGO

One of the most normal networks through which Win32/Kryptik.GCGO are injected are:

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

As soon as the Trojan is effectively injected, it will either cipher the data on the sufferer’s PC or prevent the device from working in a proper fashion – while likewise putting a ransom note that points out the demand for the sufferers to effect the payment for the purpose of decrypting the records or bring back the file system back to the first problem. In many circumstances, the ransom note will certainly show up when the client reboots the COMPUTER after the system has actually already been damaged.

Win32/Kryptik.GCGO distribution channels.

In different corners of the globe, Win32/Kryptik.GCGO grows by jumps as well as bounds. Nevertheless, the ransom notes and also techniques of extorting the ransom quantity might vary depending on specific regional (local) settings. The ransom money notes and also tricks of obtaining the ransom money amount may vary depending on particular neighborhood (regional) setups.

Ransomware injection

For example:

    Faulty notifies concerning unlicensed software.

    In specific areas, the Trojans often wrongfully report having actually detected some unlicensed applications enabled on the target’s gadget. The alert then requires the customer to pay the ransom money.

    Faulty statements regarding prohibited web content.

    In nations where software application piracy is less preferred, this method is not as effective for the cyber frauds. Additionally, the Win32/Kryptik.GCGO popup alert might wrongly assert to be stemming from a police institution and also will certainly report having situated child porn or various other unlawful data on the gadget.

    Win32/Kryptik.GCGO popup alert might falsely declare to be deriving from a regulation enforcement institution as well as will certainly report having situated child porn or various other illegal information on the gadget. The alert will similarly have a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 401544ED
md5: cc34d4c784f816a56ecb64d14f67996f
name: CC34D4C784F816A56ECB64D14F67996F.mlw
sha1: 5a7ba08c070ea061a3f4600a31245f662f60ac58
sha256: 4cfd00c3fa7b85d2dea3738140fb95c9b52edb55aff73de7dbb92b821656ce11
sha512: 893b650378c90b9585905b585239390f2ad0cac2fdb10255d85c5636d737cce3f2b0ac91234b1c33c1072d3e538d3be2ea6a7d08550b1655e8038026403ed1ce
ssdeep: 6144:cQYZ/SYklXuHjBV56sQInZM3llcw8wSOcOSd1bk7SKGr9gpyh:0VSYk2jBV5FQInZUleOqDEpyh
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GCGO also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0053305e1 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader25.64837
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Mauvaise.SL1
ALYac Trojan.BRMon.Gen.1
Cylance Unsafe
Zillya Trojan.Kryptik.Win32.1360372
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba Trojan:Win32/Gandcrab.9e6c4b80
K7GW Trojan ( 655333331 )
Cybereason malicious.784f81
Cyren W32/S-cab1c03c!Eldorado
Symantec Ransom.Crysis
ESET-NOD32 a variant of Win32/Kryptik.GCGO
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Trojan.Emotet-6446128-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.BRMon.Gen.1
NANO-Antivirus Trojan.Win32.Kryptik.exxznb
SUPERAntiSpyware Trojan.Agent/Gen-Emotet
MicroWorld-eScan Trojan.BRMon.Gen.1
Tencent Malware.Win32.Gencirc.10c88a41
Ad-Aware Trojan.BRMon.Gen.1
Sophos ML/PE-A + Mal/Ransom-FN
Comodo Application.Win32.IStartSurf.PS@8c4m91
BitDefenderTheta Gen:NN.ZexaF.34690.tuW@aitK7RcG
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_HPGANDCRAB.SMG2
McAfee-GW-Edition BehavesLike.Win32.Generic.fc
FireEye Generic.mg.cc34d4c784f816a5
Emsisoft Trojan.BRMon.Gen.1 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Backdoor.Androm.wgh
Avira HEUR/AGEN.1126869
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Generic.ASMalwS.2432958
Microsoft Trojan:Win32/Gandcrab.GM!MTB
AegisLab Trojan.Win32.Generic.4!c
GData Trojan.BRMon.Gen.1
AhnLab-V3 Trojan/Win32.Magniber.R218654
Acronis suspicious
McAfee GenericRXDW-TY!CC34D4C784F8
MAX malware (ai score=99)
VBA32 Trojan.Scar
Malwarebytes Trojan.MalPack
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_HPGANDCRAB.SMG2
Rising Ransom.Wadhrama!8.E401 (C64:YzY0OpZaQ4bCek27)
Yandex Trojan.GenAsa!b1CyoEVYEew
Ikarus Virus.Win32.Obfuscator
MaxSecure Ransomeware.CRAB.gen
Fortinet W32/Kryptik.GCBO!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Win32/Kryptik.GCGO 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.GCGO 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.GCGO 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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