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

What is Ransom:Win32/GandCrab.B infection?

In this short article you will certainly find regarding the definition of Ransom:Win32/GandCrab.B as well as its adverse impact on your computer system. Such ransomware are a kind of malware that is specified by online scams to require paying the ransom by a sufferer.

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In the majority of the cases, Ransom:Win32/GandCrab.B infection will instruct its targets to start funds transfer for the objective of reducing the effects of the modifications that the Trojan infection has presented to the victim’s gadget.

Ransom:Win32/GandCrab.B Summary

These alterations can be as adheres to:

  • 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.
  • 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
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers found on the sufferer’s hard drive — so the victim can no more make use of 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.com Win.Ransomware.Gandcrab-6450061-1
dns1.soprodns.ru Win.Ransomware.Gandcrab-6450061-1
nomoreransom.coin Win.Ransomware.Gandcrab-6450061-1
nomoreransom.bit Win.Ransomware.Gandcrab-6450061-1
dns2.soprodns.ru Win.Ransomware.Gandcrab-6450061-1
gandcrab.bit Win.Ransomware.Gandcrab-6450061-1


The most typical channels where Ransom:Win32/GandCrab.B Trojans are injected are:

  • By means of phishing emails;
  • As a repercussion of individual winding up on a resource that organizes a malicious software program;

As quickly as the Trojan is effectively infused, it will certainly either cipher the information on the target’s PC or protect against the tool from operating in a correct manner – while likewise putting a ransom note that mentions the demand for the sufferers to impact the settlement for the function of decrypting the records or recovering the file system back to the initial condition. In the majority of instances, the ransom money note will turn up when the customer reboots the COMPUTER after the system has currently been harmed.

Ransom:Win32/GandCrab.B circulation channels.

In different edges of the world, Ransom:Win32/GandCrab.B expands by leaps and bounds. Nevertheless, the ransom notes as well as techniques of obtaining the ransom money quantity may differ depending upon certain local (local) setups. The ransom money notes and also methods of obtaining the ransom money amount might vary depending on certain neighborhood (local) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software program.

    In particular locations, the Trojans commonly wrongfully report having actually identified some unlicensed applications made it possible for on the sufferer’s tool. The sharp then requires the customer to pay the ransom money.

    Faulty declarations concerning illegal content.

    In nations where software application piracy is less preferred, this approach is not as efficient for the cyber frauds. Conversely, the Ransom:Win32/GandCrab.B popup alert might incorrectly declare to be deriving from a police establishment as well as will report having located youngster pornography or other illegal data on the device.

    Ransom:Win32/GandCrab.B popup alert might falsely assert to be deriving from a law enforcement organization and will certainly report having situated kid pornography or other illegal information on the device. The alert will similarly include a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 4EFA77F1
md5: d631f9633368c71f23750b5d4a52d2f3
name: D631F9633368C71F23750B5D4A52D2F3.mlw
sha1: ffbb05240c3b3ee8498580c8e85d204ec24bbbd1
sha256: 4e9fb99f16594efd42de57aa0651e56d2451a9155424d5db170462c2de977a6f
sha512: 95f762b14228ce6f63ff8f36cb1d54654623b93e02bf07cec45c474aabf88f8d360c58d786fdd1d2efca9622cad6d5cc71ff0771e6b9149907b8ba27bcad4763
ssdeep: 6144:D8HHCCm8hhs8UY2IwAG/6y/Gi4yD3Y/A/xn/oVlGGWyoV8:D6HCuhhs8UYV9+Gh+3Y/2ngVlGGWyo+
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/GandCrab.B also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.BRMon.Gen.3
FireEye Generic.mg.d631f9633368c71f
CAT-QuickHeal Trojan.Mauvaise.SL1
McAfee GenericRXFE-YN!D631F9633368
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Trojan.Win32.Save.a
K7AntiVirus Trojan ( 0053305e1 )
BitDefender Trojan.BRMon.Gen.3
K7GW Trojan ( 005267131 )
CrowdStrike win/malicious_confidence_100% (D)
Cyren W32/S-c07995ba!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Avast FileRepMalware
ClamAV Win.Ransomware.Gandcrab-6450061-1
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Ransom:Win32/GandCrab.2ca3525e
NANO-Antivirus Trojan.Win32.Miner.exwtnf
ViRobot Trojan.Win32.GandCrab.263680
Rising Ransom.GandCrypt!8.F33E (CLOUD)
Ad-Aware Trojan.BRMon.Gen.3
Emsisoft Trojan.BRMon.Gen.3 (B)
F-Secure Heuristic.HEUR/AGEN.1103299
DrWeb Trojan.MulDrop7.61466
Zillya Trojan.GandCrypt.Win32.37
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
MaxSecure Trojan.Malware.300983.susgen
Sophos Mal/Generic-R + Mal/Ransom-FN
Ikarus Trojan-Ransom.GandCrab
Jiangmin Trojan.Agentb.ctb
Avira HEUR/AGEN.1103299
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft Ransom:Win32/GandCrab.B
Arcabit Trojan.BRMon.Gen.3
SUPERAntiSpyware Trojan.Agent/Gen-Malagent
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.BRMon.Gen.3
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win.MalPe.X2055
Acronis suspicious
VBA32 TrojanRansom.GandCrypt
ALYac Trojan.BRMon.Gen.3
MAX malware (ai score=98)
Malwarebytes Trojan.MalPack
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.GCYE
TrendMicro-HouseCall TSPY_EMOTET.SMD3
Tencent Malware.Win32.Gencirc.10b08c90
Yandex Trojan.GenAsa!IR9EosCtN9w
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_88%
Fortinet W32/GenKryptik.BAZY!tr
BitDefenderTheta Gen:NN.ZexaF.34590.qyW@aiwVXhl
AVG FileRepMalware
Cybereason malicious.33368c
Paloalto generic.ml
Qihoo-360 Win32/Trojan.efa

How to remove Ransom:Win32/GandCrab.B virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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 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 you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
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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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