Ransom:Win32/Gandcrab.B!MTB

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Ransom:Win32/Gandcrab.B!MTB infection?

In this short article you will certainly find about the definition of Ransom:Win32/Gandcrab.B!MTB and also its unfavorable impact on your computer. Such ransomware are a form of malware that is specified by online frauds to require paying the ransom money by a sufferer.

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Most of the instances, Ransom:Win32/Gandcrab.B!MTB infection will certainly instruct its targets to start funds transfer for the purpose of reducing the effects of the changes that the Trojan infection has actually presented to the victim’s device.

Ransom:Win32/Gandcrab.B!MTB 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.

  • Performs some HTTP requests;
  • 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;
  • 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
  • Attempts to identify installed AV products by installation directory;
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Creates a slightly modified copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers located on the target’s hard disk drive — so the victim can no longer use the data;
  • Preventing routine accessibility 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
ipv4bot.whatismyipaddress.comTrojan.Ransom.GandCrab.Gen.2
ns1.corp-servers.ruTrojan.Ransom.GandCrab.Gen.2
zonealarm.bitTrojan.Ransom.GandCrab.Gen.2
ns2.corp-servers.ruTrojan.Ransom.GandCrab.Gen.2
ransomware.bitTrojan.Ransom.GandCrab.Gen.2

Ransom:Win32/Gandcrab.B!MTB

One of the most regular networks where Ransom:Win32/Gandcrab.B!MTB Ransomware Trojans are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a consequence of individual winding up on a resource that organizes a malicious software program;

As quickly as the Trojan is effectively injected, it will either cipher the information on the victim’s computer or avoid the gadget from operating in an appropriate way – while also positioning a ransom money note that states the requirement for the targets to impact the repayment for the objective of decrypting the papers or bring back the documents system back to the preliminary condition. In a lot of instances, the ransom money note will turn up when the customer reboots the PC after the system has already been damaged.

Ransom:Win32/Gandcrab.B!MTB distribution networks.

In different edges of the globe, Ransom:Win32/Gandcrab.B!MTB expands by leaps and bounds. However, the ransom notes and also methods of extorting the ransom quantity might differ depending upon particular neighborhood (local) settings. The ransom money notes and methods of obtaining the ransom money quantity might vary depending on specific local (regional) settings.

Ransomware injection

For instance:

    Faulty alerts about unlicensed software program.

    In certain areas, the Trojans typically wrongfully report having identified some unlicensed applications enabled on the victim’s tool. The alert after that demands the user to pay the ransom.

    Faulty statements about unlawful web content.

    In countries where software application piracy is less prominent, this approach is not as effective for the cyber frauds. Alternatively, the Ransom:Win32/Gandcrab.B!MTB popup alert might incorrectly assert to be stemming from a law enforcement establishment and will certainly report having located child porn or various other illegal data on the gadget.

    Ransom:Win32/Gandcrab.B!MTB popup alert might falsely assert to be obtaining from a law enforcement institution and will certainly report having located child pornography or various other illegal data on the device. The alert will similarly consist of a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: 5579CEE9
md5: 8ad3f75ac621423be72d7375730e9ca8
name: 8AD3F75AC621423BE72D7375730E9CA8.mlw
sha1: 7de11ab8d90a078a28f9fd05af9347628768bc5b
sha256: 4fc23e6d8ddba0abcbc8d208cff1ffa16f503739119fd10cbed1e0b93eb164d5
sha512: cafec1dee983ec8d7391f1c97cd92ab31637f554685518111f0728bb14bb248e3acf36757c707b62f376daa2ee1698fb02d1d3eef5b8ababc529875b70ee98eb
ssdeep: 3072:t51Sm6JiWR4tEMLsK9jVbdd5G45A3waWGOEN+TBmYAPdhim1ww7EGKB170U4mAe:t5oTALVFJds3waWD5TBgPqe7ynAUB
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/Gandcrab.B!MTB also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
Elasticmalicious (high confidence)
MicroWorld-eScanTrojan.Ransom.GandCrab.Gen.2
FireEyeGeneric.mg.8ad3f75ac621423b
CAT-QuickHealTrojan.Chapak.ZZ6
Qihoo-360Win32/Trojan.Ransom.847
McAfeePacked-FCX!8AD3F75AC621
CylanceUnsafe
VIPRETrojan.Win32.Generic!BT
SangforWin.Packed.Gandcrab-6552923-4
K7AntiVirusTrojan ( 0053ca441 )
BitDefenderTrojan.Ransom.GandCrab.Gen.2
K7GWTrojan ( 0053ca441 )
Cybereasonmalicious.ac6214
CyrenW32/S-4aefe6d8!Eldorado
SymantecPacked.Generic.525
APEXMalicious
AvastWin32:RansomX-gen [Ransom]
ClamAVWin.Packed.Gandcrab-6552923-4
KasperskyHEUR:Trojan.Win32.Generic
NANO-AntivirusTrojan.Win32.Upatre.fahjds
ViRobotTrojan.Win32.GandCrab.Gen.A
AegisLabTrojan.Win32.GandCrypt.tpV3
RisingRansom.GandCrypt!8.F33E (RDMK:cmRtazpN/wWWRdH0yE4IjtgfsT+t)
Ad-AwareTrojan.Ransom.GandCrab.Gen.2
EmsisoftTrojan.Ransom.GandCrab.Gen.2 (B)
ComodoTrojWare.Win32.Chapak.BX@7m0x5h
F-SecureTrojan.TR/FileCoder.O
DrWebTrojan.PWS.Banker1.27041
ZillyaDownloader.Upatre.Win32.65892
TrendMicroRansom_GANDCRAB.SMALY-3
McAfee-GW-EditionBehavesLike.Win32.Generic.dc
SophosMal/Generic-R + Mal/Agent-AUL
IkarusTrojan.Win32.Ranumbot
JiangminTrojan.Foreign.ekq
AviraTR/FileCoder.O
MAXmalware (ai score=99)
Antiy-AVLTrojan/Win32.TSGeneric
MicrosoftRansom:Win32/Gandcrab.B!MTB
ArcabitTrojan.Ransom.GandCrab.Gen.2
SUPERAntiSpywareTrojan.Agent/Gen-Kryptik
ZoneAlarmHEUR:Trojan.Win32.Generic
GDataTrojan.Ransom.GandCrab.Gen.2
CynetMalicious (score: 100)
AhnLab-V3Win-Trojan/Gandcrab.Exp
Acronissuspicious
BitDefenderThetaGen:NN.ZexaF.34590.nuX@amJBj9ni
ALYacTrojan.Ransom.GandCrab.Gen.2
TACHYONRansom/W32.GandCrab
VBA32BScope.Trojan.Chapak
MalwarebytesTrojan.MalPack
PandaTrj/Genetic.gen
ZonerTrojan.Win32.67569
ESET-NOD32Win32/Filecoder.GandCrab.B
TrendMicro-HouseCallRansom_GANDCRAB.SMALY-3
TencentMalware.Win32.Gencirc.10b9cde8
YandexTrojan.PWS.Coins!e+suQy6oBoA
SentinelOneStatic AI – Malicious PE
eGambitUnsafe.AI_Score_99%
FortinetW32/Kryptik.HCUD!tr
AVGWin32:RansomX-gen [Ransom]
Paloaltogeneric.ml
CrowdStrikewin/malicious_confidence_100% (D)
MaxSecureTrojan.Emotet.Gen.3

How to remove Ransom:Win32/Gandcrab.B!MTB 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 Ransom:Win32/Gandcrab.B!MTB 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 Ransom:Win32/Gandcrab.B!MTB 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/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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