Ransom:Win32/GandCrab.AJ

What is Ransom:Win32/GandCrab.AJ infection?

In this post you will discover regarding the definition of Ransom:Win32/GandCrab.AJ and its adverse impact on your computer system. Such ransomware are a form of malware that is specified by on the internet frauds to require paying the ransom by a target.

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In the majority of the cases, Ransom:Win32/GandCrab.AJ ransomware will certainly instruct its victims to start funds transfer for the function of reducing the effects of the changes that the Trojan infection has presented to the target’s gadget.

Ransom:Win32/GandCrab.AJ Summary

These modifications 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;
  • Unconventionial language used in binary resources: Danish;
  • 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;
  • 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;
  • 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 records situated on the victim’s hard drive — so the sufferer can no more utilize the data;
  • Preventing normal 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
ipv4bot.whatismyipaddress.com W32/Ransom.KH.gen!Eldorado
ns1.wowservers.ru W32/Ransom.KH.gen!Eldorado
carder.bit W32/Ransom.KH.gen!Eldorado
ns2.wowservers.ru W32/Ransom.KH.gen!Eldorado
ransomware.bit W32/Ransom.KH.gen!Eldorado

Ransom:Win32/GandCrab.AJ

One of the most normal networks through which Ransom:Win32/GandCrab.AJ Ransomware Trojans are injected are:

  • By ways of phishing e-mails;
  • As a consequence of individual ending up on a resource that organizes a harmful software program;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the target’s computer or prevent the tool from operating in a proper fashion – while also putting a ransom note that states the need for the sufferers to effect the settlement for the purpose of decrypting the documents or restoring the file system back to the first condition. In most instances, the ransom note will certainly show up when the client restarts the COMPUTER after the system has already been damaged.

Ransom:Win32/GandCrab.AJ distribution channels.

In numerous corners of the globe, Ransom:Win32/GandCrab.AJ grows by jumps and bounds. Nevertheless, the ransom notes and techniques of extorting the ransom money amount may vary relying on certain local (regional) settings. The ransom money notes as well as methods of extorting the ransom money amount might vary depending on particular regional (local) setups.

Ransomware injection

For example:

    Faulty signals concerning unlicensed software.

    In certain locations, the Trojans usually wrongfully report having detected some unlicensed applications enabled on the victim’s device. The alert after that demands the user to pay the ransom.

    Faulty statements regarding prohibited content.

    In countries where software piracy is much less prominent, this technique is not as reliable for the cyber fraudulences. Alternatively, the Ransom:Win32/GandCrab.AJ popup alert may wrongly claim to be originating from a police organization as well as will report having located youngster porn or various other prohibited information on the tool.

    Ransom:Win32/GandCrab.AJ popup alert may incorrectly claim to be acquiring from a regulation enforcement institution and also will report having located kid pornography or various other unlawful information on the device. The alert will similarly contain a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 265CDF19
md5: a99f4864bf31159bca106e2eb854cde9
name: A99F4864BF31159BCA106E2EB854CDE9.mlw
sha1: dce8ac013157ef9ad6d0fc67e9a2a43a04490b57
sha256: b12e62c17c045640c99918ebd27a2b453da171ae80ead952017b84aa19799f41
sha512: 562f9ebef3c6f27be30717c40748c54634df23bdad98021d364c2b2663be46b772c576c704bee4bfbf2c2aac017456be64eda7bd0ea3944be5637300b9151ded
ssdeep: 3072:SFrWxYKFDnqvffIY0nStLBN3cwiZv3Q4c+U+guDIqz8br0xa7+mHqnE6i:SF0YKZSYJnSjxQvwazC4xw+mEXi
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

ProductVersion: 2.13.5.66
Translation: 0x0844 0x16d3

Ransom:Win32/GandCrab.AJ also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKDZ.44904
CAT-QuickHeal Trojan.Chapak.ZZ5
McAfee GenericRXFY-IV!A99F4864BF31
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Win.Packed.Gandcrab-6552923-4
K7AntiVirus Trojan ( 005357ca1 )
BitDefender Trojan.GenericKDZ.44904
K7GW Trojan ( 005357ca1 )
Cybereason malicious.4bf311
Cyren W32/Ransom.KH.gen!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Avast Win32:RansomX-gen [Ransom]
ClamAV Win.Packed.Gandcrab-6552923-4
Kaspersky Trojan-Ransom.Win32.GandCrypt.cbs
NANO-Antivirus Trojan.Win32.Encoder.fejddx
ViRobot Trojan.Win32.GandCrab.Gen.A
AegisLab Trojan.Win32.GandCrypt.j!c
Rising Ransom.GandCrypt!8.F33E (CLOUD)
Ad-Aware Trojan.GenericKDZ.44904
Emsisoft Trojan.GenericKDZ.44904 (B)
Comodo TrojWare.Win32.Ransom.GandCrab.GR@826oxk
F-Secure Trojan.TR/FileCoder.asw
DrWeb Trojan.Encoder.24384
Zillya Trojan.GenericKDZ.Win32.2445
TrendMicro Ransom.Win32.GANDCRAB.SMLA.hp
McAfee-GW-Edition BehavesLike.Win32.Emotet.dc
FireEye Generic.mg.a99f4864bf31159b
Sophos Mal/Generic-R + Mal/Agent-AUL
Ikarus Trojan-Ransom.GandCrab
Jiangmin Trojan.GandCrypt.ga
MaxSecure Ransomeware.CRAB.gen
Avira TR/FileCoder.asw
MAX malware (ai score=100)
Antiy-AVL Trojan[Banker]/Win32.Gozi
Microsoft Ransom:Win32/GandCrab.AJ
Arcabit Trojan.Generic.DAF68
SUPERAntiSpyware Ransom.GandCrab/Variant
ZoneAlarm Trojan-Ransom.Win32.GandCrypt.cbs
GData Trojan.GenericKDZ.44904
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/Gandcrab.Exp
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34590.nu1@aWEJ4ylG
ALYac Trojan.GenericKDZ.44904
TACHYON Ransom/W32.GandCrab
VBA32 BScope.TrojanRansom.GandCrypt
Malwarebytes Trojan.Bunitu
Panda Trj/Genetic.gen
Zoner Trojan.Win32.69787
ESET-NOD32 Win32/Filecoder.GandCrab.B
TrendMicro-HouseCall Ransom.Win32.GANDCRAB.SMLA.hp
Tencent Malware.Win32.Gencirc.10b548ab
Yandex Trojan.GenAsa!zOgZ+wrJ94Y
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_97%
Fortinet W32/GenKryptik.CNAR!tr
AVG Win32:RansomX-gen [Ransom]
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Ransom.GandCrab.HwoCeGYA

How to remove Ransom:Win32/GandCrab.AJ 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.AJ 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.AJ 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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