Trojan:Win32/CryptInject.YY!MTB

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

What is Trojan:Win32/CryptInject.YY!MTB infection?

In this post you will discover about the interpretation of Trojan:Win32/CryptInject.YY!MTB as well as its adverse influence on your computer. Such ransomware are a form of malware that is clarified by on the internet frauds to require paying the ransom money by a target.

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Most of the cases, Trojan:Win32/CryptInject.YY!MTB infection will advise its victims to initiate funds move for the objective of neutralizing the changes that the Trojan infection has actually introduced to the target’s gadget.

Trojan:Win32/CryptInject.YY!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.
  • A process attempted to delay the analysis task.;
  • 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;
  • 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 documents located on the sufferer’s hard disk — so the victim can no more make use of the information;
  • Preventing regular access to the target’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 Trojan.Ransom.GandCrab.Gen.2
ns1.wowservers.ru Trojan.Ransom.GandCrab.Gen.2
carder.bit Trojan.Ransom.GandCrab.Gen.2
ns2.wowservers.ru Trojan.Ransom.GandCrab.Gen.2
ransomware.bit Trojan.Ransom.GandCrab.Gen.2

Trojan:Win32/CryptInject.YY!MTB

One of the most normal networks through which Trojan:Win32/CryptInject.YY!MTB Ransomware are injected are:

  • By ways of phishing e-mails;
  • As a repercussion of individual winding up on a source that organizes a malicious software;

As soon as the Trojan is effectively injected, it will certainly either cipher the data on the target’s PC or avoid the device from operating in an appropriate manner – while likewise putting a ransom money note that states the requirement for the victims to effect the payment for the function of decrypting the papers or restoring the documents system back to the preliminary problem. In many circumstances, the ransom money note will certainly turn up when the customer restarts the COMPUTER after the system has currently been damaged.

Trojan:Win32/CryptInject.YY!MTB distribution networks.

In various edges of the globe, Trojan:Win32/CryptInject.YY!MTB expands by jumps and bounds. Nonetheless, the ransom money notes and methods of obtaining the ransom amount might vary depending upon specific local (regional) setups. The ransom money notes and methods of obtaining the ransom quantity might vary depending on specific regional (local) settings.

Ransomware injection

For example:

    Faulty signals concerning unlicensed software.

    In certain areas, the Trojans usually wrongfully report having identified some unlicensed applications allowed on the victim’s device. The sharp then demands the individual to pay the ransom money.

    Faulty declarations regarding illegal material.

    In nations where software application piracy is less popular, this technique is not as efficient for the cyber fraudulences. Alternatively, the Trojan:Win32/CryptInject.YY!MTB popup alert may incorrectly assert to be originating from a law enforcement institution and also will certainly report having situated kid porn or other illegal data on the device.

    Trojan:Win32/CryptInject.YY!MTB popup alert may incorrectly claim to be acquiring from a legislation enforcement institution and also will certainly report having situated child porn or other illegal data on the gadget. The alert will likewise contain a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: 16736FC3
md5: 1f1c7b6b271ce1d3832202c354f4df5d
name: 1F1C7B6B271CE1D3832202C354F4DF5D.mlw
sha1: af85fe22be36365800b7a87145faae4cad933ab0
sha256: 4e6b3aec10bed233cade3d6a99b37cc3603aac58343915b1677c03842087434a
sha512: 306bf423753615bb8245bcde1329b639ebae86cefcee00ffe33040394799296afd196aaa1bd51894e751eb10eff3507e81fe48c599f7914ee9dbd14c075ae90f
ssdeep: 6144:Ldvy+LiAx1ilayXFqVBnWGJAPmrBgRk7H:Ld5LiAbV5WIAPM+aT
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0346 0x093e

Trojan:Win32/CryptInject.YY!MTB also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.24384
MicroWorld-eScan Trojan.Ransom.GandCrab.Gen.2
CAT-QuickHeal Trojan.Chapak.ZZ5
ALYac Trojan.Ransom.GandCrab.Gen.2
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Win.Packed.Gandcrab-6552923-4
K7AntiVirus Adware ( 004ef1551 )
BitDefender Trojan.Ransom.GandCrab.Gen.2
K7GW Adware ( 004ef1551 )
CrowdStrike win/malicious_confidence_100% (D)
BitDefenderTheta Gen:NN.ZexaF.34590.uuX@aO@fGOlO
Cyren W32/S-6d8ba1f9!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Packed.Gandcrab-6552923-4
Kaspersky HEUR:Trojan.Win32.Generic
NANO-Antivirus Trojan.Win32.Encoder.fdymui
ViRobot Trojan.Win32.GandCrab.Gen.A
AegisLab Trojan.Win32.GandCrypt.j!c
Rising Malware.Obscure/Heur!1.A89E (CLOUD)
Ad-Aware Trojan.Ransom.GandCrab.Gen.2
TACHYON Ransom/W32.GandCrab
Sophos ML/PE-A + Mal/Agent-AUL
Comodo TrojWare.Win32.Cossta.CHA@7ozrpv
F-Secure Heuristic.HEUR/AGEN.1121531
Zillya Trojan.GandCrypt.Win32.331
TrendMicro Ransom.Win32.GANDCRAB.SMLA.hp
McAfee-GW-Edition BehavesLike.Win32.Generic.fh
FireEye Generic.mg.1f1c7b6b271ce1d3
Emsisoft Trojan.Ransom.GandCrab.Gen.2 (B)
Ikarus Trojan-Dropper.Win32.Danabot
Jiangmin Trojan.GandCrypt.ek
MaxSecure Ransomeware.CRAB.gen
Avira HEUR/AGEN.1121531
Antiy-AVL Trojan[PSW]/Win32.Coins
Microsoft Trojan:Win32/CryptInject.YY!MTB
Arcabit Trojan.Ransom.GandCrab.Gen.2
SUPERAntiSpyware Trojan.Agent/Gen-Fuerboos
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.Ransom.GandCrab.Gen.2
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/Gandcrab.Exp
Acronis suspicious
McAfee GenericRXFU-EC!1F1C7B6B271C
MAX malware (ai score=99)
VBA32 BScope.TrojanRansom.GandCrypt
Malwarebytes Trojan.MalPack
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.GHQS
TrendMicro-HouseCall Ransom.Win32.GANDCRAB.SMLA.hp
Tencent Malware.Win32.Gencirc.10b818f0
Yandex Trojan.Scar!ka339zjVuvM
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_83%
Fortinet W32/Kryptik.GOGY!tr
AVG Win32:Malware-gen
Cybereason malicious.b271ce
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Ransom.c3d

How to remove Trojan:Win32/CryptInject.YY!MTB 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 Trojan:Win32/CryptInject.YY!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:

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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Trojan:Win32/CryptInject.YY!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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