Written by Robert Bailey

What is Virus:Win32/Yaz.A infection?

In this short article you will locate concerning the meaning of Virus:Win32/Yaz.A and also its adverse effect on your computer. Such ransomware are a kind of malware that is clarified by on the internet frauds to require paying the ransom by a sufferer.

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It is better to prevent, than repair and repent!

When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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In the majority of the situations, Virus:Win32/Yaz.A virus will certainly instruct its sufferers to start funds transfer for the objective of reducing the effects of the amendments that the Trojan infection has introduced to the sufferer’s gadget.

Virus:Win32/Yaz.A Summary

These modifications can be as complies with:

  • 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.
  • Attempts to connect to a dead IP:Port (2 unique times);
  • 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.;
  • Installs OpenCL library, probably to mine Bitcoins;
  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Crashed cuckoomon during analysis. Report this error to the Github repo.;
  • 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 copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents situated on the sufferer’s hard disk drive — so the target can no more utilize the data;
  • Preventing normal accessibility 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.


One of the most normal channels through which Virus:Win32/Yaz.A Trojans are infused are:

  • By ways of phishing emails;
  • As an effect of customer ending up on a resource that hosts a destructive software application;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the sufferer’s PC or prevent the device from working in an appropriate way – while also positioning a ransom note that states the need for the victims to effect the repayment for the function of decrypting the files or restoring the documents system back to the initial condition. In a lot of circumstances, the ransom note will come up when the client reboots the PC after the system has already been harmed.

Virus:Win32/Yaz.A circulation channels.

In numerous edges of the world, Virus:Win32/Yaz.A expands by leaps as well as bounds. However, the ransom money notes as well as methods of obtaining the ransom quantity might vary relying on specific neighborhood (regional) setups. The ransom money notes and methods of extorting the ransom amount may differ depending on certain local (local) setups.

Ransomware injection

For instance:

    Faulty signals about unlicensed software program.

    In certain locations, the Trojans often wrongfully report having identified some unlicensed applications made it possible for on the target’s device. The alert then requires the user to pay the ransom money.

    Faulty statements about unlawful content.

    In nations where software piracy is less preferred, this method is not as effective for the cyber scams. Conversely, the Virus:Win32/Yaz.A popup alert may incorrectly assert to be stemming from a law enforcement establishment and also will report having situated youngster porn or various other unlawful information on the device.

    Virus:Win32/Yaz.A popup alert may wrongly declare to be acquiring from a regulation enforcement organization and will report having situated kid pornography or other illegal data on the gadget. The alert will similarly consist of a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 851DB5AC
md5: 143510dc0289122a43733b856e3de841
name: 143510DC0289122A43733B856E3DE841.mlw
sha1: 1dc712ab1ce2ad36df79e6905ca025301ac486fd
sha256: f44b39ccd6f1b9dd2bb05c19b7c2240019e3ed0912efb3a292671b76db82ed6a
sha512: 56c3af2fa9d2620090eef03140819115fbc5303653325fb80af4ba22d4fbb9de1f5c9e84dbbb48759b92125812db81e415ff8fbf5a34be6c6e4fa6b5fc15876a
ssdeep: 3072:Q2L+cvwVw5YQnxAb6BvZcHLPm+Q+owZR8KNo0:Q+15NRGznTv8Ku0
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Virus:Win32/Yaz.A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.yaExtractorDA.PE
K7AntiVirus Trojan ( 005451b81 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.94
Cynet Malicious (score: 100)
CAT-QuickHeal W32.Yaz.A
ALYac Generic.Ransom.Xorist.D28AEBD4
Cylance Unsafe
Zillya Virus.Yazzz.Win32.1
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
Alibaba Virus:Win32/Xorist.7252444f
K7GW Trojan ( 005451b81 )
Cybereason malicious.c02891
Baidu Win32.Virus.Yaz.a
Cyren W32/Yaz.A
Symantec Ransom.CryptoTorLocker
ESET-NOD32 Win32/Agent.OVQ
APEX Malicious
Avast Win32:Yaz-A
ClamAV Win.Trojan.Yaz-1
Kaspersky Virus.Win32.Yaz.a
BitDefender Generic.Ransom.Xorist.D28AEBD4
NANO-Antivirus Virus.Win32.Yaz.jgeya
ViRobot Win32.YAZ.A
MicroWorld-eScan Generic.Ransom.Xorist.D28AEBD4
Tencent Virus.Win32.Yaz.b
Ad-Aware Generic.Ransom.Xorist.D28AEBD4
Sophos Mal/Generic-R + W32/Yaz-A
Comodo TrojWare.Win32.Kryptik.ER@4o1ar2
BitDefenderTheta AI:FileInfector.9095DFEB0B
VIPRE Virus.Win32.Yaz.a (v)
TrendMicro PE_YAZ.A
McAfee-GW-Edition W32/Yaz.a
Emsisoft Generic.Ransom.Xorist.D28AEBD4 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Win32/Yaz.a
Webroot W32.Malware.Gen
Avira W32/Yazz.aumnb
Microsoft Virus:Win32/Yaz.A
AegisLab Trojan.Win32.Xorist.lpjq
GData Generic.Ransom.Xorist.D28AEBD4
AhnLab-V3 Win32/Yaz.X796
Acronis suspicious
McAfee W32/Yaz.a
MAX malware (ai score=100)
VBA32 Virus.Yazz
Malwarebytes Ransom.Xorist
Panda W32/Yazz.A
TrendMicro-HouseCall PE_YAZ.A
Rising Trojan.Ransom!1.690B (CLOUD)
Yandex Trojan.GenAsa!WMPZeg7Kq7U
Ikarus Trojan-Ransom.Xorist
Fortinet W32/Xorist.DD8C!tr.ransom
AVG Win32:Yaz-A

How to remove Virus:Win32/Yaz.A 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 Virus:Win32/Yaz.A 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 Virus:Win32/Yaz.A you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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