Win32/Kryptik.GBCM

Written by Robert Bailey

What is Win32/Kryptik.GBCM infection?

In this post you will discover regarding the interpretation of Win32/Kryptik.GBCM and its negative effect on your computer system. Such ransomware are a kind of malware that is specified by online fraudulences to require paying the ransom money by a target.

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Most of the situations, Win32/Kryptik.GBCM ransomware will certainly advise its targets to start funds transfer for the objective of neutralizing the modifications that the Trojan infection has introduced to the sufferer’s device.

Win32/Kryptik.GBCM 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.
  • A process created a hidden window;
  • 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.
  • Uses Windows utilities for basic functionality;
  • 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;
  • Deletes its original binary from disk;
  • 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.
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents found on the target’s disk drive — so the sufferer can no more utilize 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.
Similar behavior
Related domains
z.whorecord.xyz ML/PE-A + Mal/Ransom-FN
a.tomx.xyz ML/PE-A + Mal/Ransom-FN
face.com ML/PE-A + Mal/Ransom-FN
myspace.com ML/PE-A + Mal/Ransom-FN

Win32/Kryptik.GBCM

The most typical channels through which Win32/Kryptik.GBCM Ransomware Trojans are injected are:

  • By ways of phishing emails;
  • As an effect of customer winding up on a source that holds a destructive software application;

As quickly as the Trojan is efficiently injected, it will either cipher the information on the target’s computer or stop the tool from working in a proper way – while additionally putting a ransom money note that discusses the demand for the sufferers to effect the payment for the purpose of decrypting the documents or restoring the file system back to the preliminary problem. In many circumstances, the ransom note will show up when the customer restarts the COMPUTER after the system has currently been harmed.

Win32/Kryptik.GBCM circulation networks.

In different edges of the world, Win32/Kryptik.GBCM grows by leaps as well as bounds. Nonetheless, the ransom notes and tricks of obtaining the ransom money amount might vary relying on specific local (regional) setups. The ransom notes and also methods of obtaining the ransom amount may vary depending on particular neighborhood (local) settings.

Ransomware injection

For instance:

    Faulty informs about unlicensed software program.

    In particular areas, the Trojans often wrongfully report having identified some unlicensed applications made it possible for on the sufferer’s device. The sharp then requires the user to pay the ransom money.

    Faulty statements regarding unlawful content.

    In nations where software piracy is less popular, this technique is not as reliable for the cyber fraudulences. Conversely, the Win32/Kryptik.GBCM popup alert might wrongly assert to be stemming from a law enforcement organization and will report having located child pornography or other unlawful data on the device.

    Win32/Kryptik.GBCM popup alert might incorrectly assert to be deriving from a legislation enforcement organization as well as will certainly report having situated youngster porn or various other unlawful data on the tool. The alert will similarly include a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 62707D7C
md5: e89e2192758e748f8f813a8d01711dfe
name: E89E2192758E748F8F813A8D01711DFE.mlw
sha1: 55f765e02b05c939b0bc7faef26961d41fc2de17
sha256: 967a56160da48d97586646bfc12cdc5660dafabc6cf06a9041d26e3ba185d248
sha512: fe3ef9a6fe699dc2a4cdbd882c59158b95e0a5d930882e2dcbce2b31f8a156e2bddbc1d314790ead7c9f3856f319033e914a8ed8ba3f64dd0f033f6b218ef081
ssdeep: 3072:8ynzxuyDb7yNUu05cH97BTMfR0YaZTu+VTzUSxrGM5EjfijpqiROyR:8ynE7NhwfR0YaZjVTJJyijk6R
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2017, fghfghfghfgh
InternalName: sdfgsdfgs.exe
FileVersion: 1.0.0.1
ProductVersion: 1.0.0.1
Translation: 0x0809 0x04b0

Win32/Kryptik.GBCM also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0053305e1 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop7.57247
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Chapak.ZZ6
ALYac Trojan.BRMon.Gen.4
Cylance Unsafe
Zillya Trojan.Delikle.Win32.150
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 0053305e1 )
Cybereason malicious.2758e7
Cyren W32/S-764584f1!Eldorado
Symantec Packed.Generic.525
ESET-NOD32 a variant of Win32/Kryptik.GBCM
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Malware.Brmon-7136136-1
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.BRMon.Gen.4
NANO-Antivirus Trojan.Win32.Kryptik.ewpwle
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
MicroWorld-eScan Trojan.BRMon.Gen.4
Tencent Malware.Win32.Gencirc.10ba60d9
Ad-Aware Trojan.BRMon.Gen.4
Sophos ML/PE-A + Mal/Ransom-FN
Comodo TrojWare.Win32.Jorik.GBC@7ggku5
BitDefenderTheta Gen:NN.ZexaF.34684.nu0@a4etxUii
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_HPGANDCRAB.SMONT
McAfee-GW-Edition BehavesLike.Win32.Trojan.dh
FireEye Generic.mg.e89e2192758e748f
Emsisoft Trojan.BRMon.Gen.4 (B)
Jiangmin Trojan.Delikle.bu
Avira HEUR/AGEN.1126869
eGambit Unsafe.AI_Score_50%
Microsoft Ransom:Win32/GandCrab!rfn
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Win32.Trojan-Ransom.GandCrab.N
AhnLab-V3 Win-Trojan/MalPe34.Suspicious.X2029
Acronis suspicious
McAfee GenericRXDR-MW!E89E2192758E
MAX malware (ai score=100)
VBA32 BScope.Malware-Cryptor.Hlux
Malwarebytes Trojan.MalPack.GS
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_HPGANDCRAB.SMONT
Rising Malware.Obscure/Heur!1.A89E (CLOUD)
Yandex Trojan.GenAsa!JsK/9abhO6I
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/GenKryptik.CNAR!tr
AVG Win32:Malware-gen

How to remove Win32/Kryptik.GBCM 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.GBCM 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.GBCM 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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