Ransom:Win32/Critroni.B

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

What is Ransom:Win32/Critroni.B infection?

In this article you will certainly locate about the meaning of Ransom:Win32/Critroni.B and also its adverse impact on your computer. Such ransomware are a kind of malware that is elaborated by on the internet scams to require paying the ransom by a target.

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Most of the cases, Ransom:Win32/Critroni.B virus will instruct its targets to initiate funds move for the function of reducing the effects of the amendments that the Trojan infection has introduced to the victim’s gadget.

Ransom:Win32/Critroni.B Summary

These adjustments 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.
  • 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.
  • 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 hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Creates a copy of itself;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Ciphering the documents located on the victim’s disk drive — so the sufferer can no longer use the information;
  • Preventing regular access to the victim’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
z.whorecord.xyzW32/Ransom.BD.gen!Eldorado
a.tomx.xyzW32/Ransom.BD.gen!Eldorado

Ransom:Win32/Critroni.B

One of the most typical networks whereby Ransom:Win32/Critroni.B Ransomware are infused are:

  • By ways of phishing emails;
  • As a consequence of customer ending up on a source that holds a destructive software application;

As quickly as the Trojan is efficiently infused, it will certainly either cipher the data on the sufferer’s computer or protect against the gadget from working in a correct way – while likewise placing a ransom money note that states the need for the targets to effect the settlement for the purpose of decrypting the records or restoring the file system back to the preliminary problem. In a lot of instances, the ransom note will show up when the client reboots the COMPUTER after the system has already been harmed.

Ransom:Win32/Critroni.B distribution networks.

In different edges of the globe, Ransom:Win32/Critroni.B grows by jumps and also bounds. Nonetheless, the ransom money notes and techniques of obtaining the ransom money quantity might vary depending upon particular neighborhood (regional) setups. The ransom money notes and methods of extorting the ransom amount may vary depending on specific local (regional) setups.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software program.

    In specific locations, the Trojans frequently wrongfully report having discovered some unlicensed applications enabled on the sufferer’s tool. The alert then requires the customer to pay the ransom money.

    Faulty declarations regarding prohibited material.

    In nations where software program piracy is less popular, this approach is not as reliable for the cyber frauds. Additionally, the Ransom:Win32/Critroni.B popup alert may wrongly claim to be deriving from a police establishment and also will report having situated youngster porn or various other unlawful data on the tool.

    Ransom:Win32/Critroni.B popup alert may wrongly claim to be obtaining from a legislation enforcement institution as well as will certainly report having located youngster pornography or various other prohibited information on the gadget. The alert will in a similar way consist of a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: DBC85EE8
md5: 5eb91075af69ceede90f49710cd2811e
name: 5EB91075AF69CEEDE90F49710CD2811E.mlw
sha1: 9e352a8f4e6ac3dce4cdd66d401240d5ad641511
sha256: 513d0b702c997934ebfe30db362736813e49900b67c3536a43d73d973903dfda
sha512: 3b1693c666cccf36ef9fec861c2cb36dbae51653f686f6c4b538daa2e6c8ea7fbf81225fa636316f2ec897d1d6a2ec19acb5f26a9313ccb5f02adb5044965b6b
ssdeep: 24576:IBBWNRYJLvh/UUotsSfXFtebgOzz4hauT9ULsXK:sBWNRchLAsqKL4f
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/Critroni.B also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
Elasticmalicious (high confidence)
MicroWorld-eScanGen:Heur.Kelios.1
FireEyeGeneric.mg.5eb91075af69ceed
McAfeeGenericRXGH-DB!5EB91075AF69
CylanceUnsafe
VIPRETrojan.Win32.Generic!BT
SangforTrojan.Win32.Save.a
K7AntiVirusTrojan ( 004dcfc21 )
BitDefenderGen:Heur.Kelios.1
K7GWTrojan ( 004dcfc21 )
CrowdStrikewin/malicious_confidence_100% (D)
CyrenW32/Ransom.BD.gen!Eldorado
SymantecML.Attribute.HighConfidence
APEXMalicious
AvastWin32:Critroni-C [Trj]
ClamAVWin.Ransomware.Kelios-7337296-0
KasperskyHEUR:Trojan.Win32.Generic
NANO-AntivirusTrojan.Win32.Filecoder.fcraex
RisingRansom.Onion!8.478 (CLOUD)
Ad-AwareGen:Heur.Kelios.1
EmsisoftGen:Heur.Kelios.1 (B)
F-SecureTrojan.TR/Dropper.Gen
DrWebTrojan.Encoder.686
TrendMicroRansom_CRYPCBT.SMA
McAfee-GW-EditionGenericRXGH-DB!5EB91075AF69
SophosMal/Generic-R + Mal/Harnig-B
IkarusTrojan-Ransom.CTBLocker
JiangminTrojan.Generic.cfbww
MaxSecureTrojan.Malware.300983.susgen
AviraTR/Dropper.Gen
MAXmalware (ai score=100)
Antiy-AVLTrojan/Win32.AGeneric
MicrosoftRansom:Win32/Critroni.B
ArcabitTrojan.Kelios.1
ZoneAlarmHEUR:Trojan.Win32.Generic
GDataGen:Heur.Kelios.1
CynetMalicious (score: 100)
AhnLab-V3Trojan/Win32.Agent.C430204
Acronissuspicious
BitDefenderThetaAI:Packer.07BFEB4F1E
VBA32SScope.TrojanRansom.Crytroni
MalwarebytesMalware.AI.2282856503
PandaTrj/CI.A
ESET-NOD32a variant of Win32/Filecoder.CTBLocker.A
TrendMicro-HouseCallRansom_CRYPCBT.SMA
TencentMalware.Win32.Gencirc.10c8f2fe
YandexTrojan.GenAsa!VwU6Lt63MzM
SentinelOneStatic AI – Malicious PE
FortinetW32/Generic.AC.411BE0!tr
AVGWin32:Critroni-C [Trj]
Cybereasonmalicious.5af69c
Paloaltogeneric.ml
Qihoo-360Win32/Trojan.49b

How to remove Ransom:Win32/Critroni.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 Ransom:Win32/Critroni.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:

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If the guide doesn’t help you to remove Ransom:Win32/Critroni.B 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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