Written by Robert Bailey

What is Trojan:VBS/Irsaz.B infection?

In this post you will certainly find about the definition of Trojan:VBS/Irsaz.B and its unfavorable impact on your computer system. Such ransomware are a form of malware that is specified by online scams to demand paying the ransom by a sufferer.

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In the majority of the cases, Trojan:VBS/Irsaz.B infection will certainly instruct its sufferers to launch funds transfer for the objective of counteracting the modifications that the Trojan infection has actually presented to the sufferer’s device.

Trojan:VBS/Irsaz.B Summary

These alterations can be as complies with:

  • Injection (inter-process);
  • Injection with CreateRemoteThread in a remote process;
  • Uses Windows utilities for basic functionality;
  • Network activity detected but not expressed in API logs;
  • Ciphering the documents situated on the sufferer’s hard disk drive — so the target can no more use the data;
  • Preventing regular accessibility to the victim’s workstation;



The most common networks where Trojan:VBS/Irsaz.B Trojans are injected are:

  • By ways of phishing e-mails;
  • As an effect of user winding up on a source that organizes a destructive software program;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the data on the sufferer’s PC or avoid the tool from operating in an appropriate way – while also placing a ransom note that discusses the need for the victims to effect the repayment for the objective of decrypting the papers or restoring the file system back to the first condition. In a lot of circumstances, the ransom note will come up when the client reboots the COMPUTER after the system has currently been damaged.

Trojan:VBS/Irsaz.B circulation channels.

In numerous corners of the world, Trojan:VBS/Irsaz.B expands by leaps and also bounds. However, the ransom money notes and also methods of extorting the ransom amount might differ relying on specific local (local) settings. The ransom money notes and techniques of obtaining the ransom money quantity may vary depending on particular regional (regional) settings.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software program.

    In certain locations, the Trojans often wrongfully report having identified some unlicensed applications enabled on the target’s tool. The sharp then demands the individual to pay the ransom money.

    Faulty statements concerning prohibited material.

    In countries where software application piracy is less preferred, this technique is not as effective for the cyber frauds. Conversely, the Trojan:VBS/Irsaz.B popup alert might falsely claim to be stemming from a police establishment and also will certainly report having located child pornography or other illegal information on the tool.

    Trojan:VBS/Irsaz.B popup alert might falsely assert to be acquiring from a regulation enforcement institution as well as will certainly report having located child porn or other unlawful data on the gadget. The alert will similarly have a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: F7C11913
md5: bd1ec2725a7b48c24689625bcb7ba668
name: upload_file
sha1: 6e9b8d84bf5fcc6d96109df02934e35f410fc5cd
sha256: 167c73656e26e69d418a9cbc4a811cdbacbf130bcc06ae3e6e4a4794ae94bad2
sha512: b6f969d4f1edbfc714ecf3e0bbe3677de2a43e52df6dde3766226e8ce3d84db67d3bbeed39f2ae7490de05738201682aa3975ff13abe986529a434a0fa2dfc71
ssdeep: 3072:Np8xbeXigeXrd1LHLLdV60Q0bampZevEzRbURCBeGK/6bbIpklgVDSxGfmuZmUu:Np8xbeXigeXrd1LH3dV6zMovRCBeGKWd
type: ASCII text, with very long lines, with CRLF line terminators

Version Info:

0: [No Data]

Trojan:VBS/Irsaz.B also known as:

GridinSoft Trojan.Ransom.Gen
MicroWorld-eScan JS:Trojan.Cryxos.3662
CAT-QuickHeal VBS.Agent.34768
McAfee VBS/Autorun.worm.aaha
Sangfor Malware
Arcabit JS:Trojan.Cryxos.DE4E
Cyren JS/Agent.AGG4!Eldorado
Symantec Trojan.Malscript
Avast JS:ADODB-BL [Expl]
ClamAV Txt.Packed.Cryxos-7111887-0
BitDefender JS:Trojan.Cryxos.3662
NANO-Antivirus Trojan.Script.Dropper.foxxbq
AegisLab Trojan.Script.Agent.4!c
Tencent Script.Trojan.Agent.Pfte
Ad-Aware JS:Trojan.Cryxos.3662
Emsisoft JS:Trojan.Cryxos.3662 (B)
Comodo Worm.JS.Vjworm.AK@8cyo73
F-Secure Malware.JS/Vjworm.AI
DrWeb PowerShell.Packed.25
McAfee-GW-Edition BehavesLike.VBS.Dropper.cj
FireEye JS:Trojan.Cryxos.3662
Avira JS/Vjworm.AI
MAX malware (ai score=81)
Microsoft Trojan:VBS/Irsaz.B
GData JS:Trojan.Cryxos.3662
AhnLab-V3 Backdoor/JS.Agent.S1250
ALYac Trojan.Dropper.VBS.Agent
Rising Backdoor.Houdini/JS!1.C2BA (CLASSIC)
Ikarus Worm.JS.Vjworm
Qihoo-360 virus.js.qexvmc.1

How to remove Trojan:VBS/Irsaz.B 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 Trojan:VBS/Irsaz.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 Trojan:VBS/Irsaz.B 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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