Ransom:Win32/Crowti

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

What is Ransom:Win32/Crowti infection?

In this short article you will find concerning the definition of Ransom:Win32/Crowti as well as its adverse impact on your computer system. Such ransomware are a kind of malware that is clarified by on-line scams to demand paying the ransom by a victim.

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In the majority of the instances, Ransom:Win32/Crowti infection will certainly advise its targets to initiate funds move for the objective of reducing the effects of the modifications that the Trojan infection has actually introduced to the sufferer’s gadget.

Ransom:Win32/Crowti 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.
  • Injection (inter-process);
  • 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.
  • Mimics the system’s user agent string for its own requests;
  • Deletes its original binary from disk;
  • Exhibits behavior characteristic of Cryptowall ransomware;
  • 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 papers situated on the sufferer’s hard drive — so the sufferer can no more utilize 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.

Ransom:Win32/Crowti

The most normal channels where Ransom:Win32/Crowti are injected are:

  • By means of phishing e-mails;
  • As a repercussion of customer ending up on a source that holds a malicious software application;

As soon as the Trojan is effectively infused, it will either cipher the data on the victim’s computer or avoid the tool from functioning in a proper way – while likewise putting a ransom note that discusses the demand for the sufferers to effect the settlement for the purpose of decrypting the records or recovering the data system back to the first problem. In a lot of circumstances, the ransom money note will certainly show up when the customer reboots the PC after the system has currently been damaged.

Ransom:Win32/Crowti distribution networks.

In different edges of the globe, Ransom:Win32/Crowti grows by jumps and bounds. Nevertheless, the ransom money notes and tricks of obtaining the ransom money amount might differ depending on specific regional (local) setups. The ransom money notes and techniques of obtaining the ransom money quantity might differ depending on certain regional (local) setups.

Ransomware injection

As an example:

    Faulty alerts regarding unlicensed software.

    In certain areas, the Trojans typically wrongfully report having found some unlicensed applications made it possible for on the target’s gadget. The alert after that demands the customer to pay the ransom money.

    Faulty declarations concerning prohibited material.

    In nations where software program piracy is less preferred, this technique is not as effective for the cyber fraudulences. Conversely, the Ransom:Win32/Crowti popup alert may incorrectly declare to be originating from a police institution and also will certainly report having situated kid pornography or various other illegal data on the tool.

    Ransom:Win32/Crowti popup alert may wrongly assert to be acquiring from a regulation enforcement organization and will report having situated kid porn or various other unlawful data on the gadget. The alert will similarly contain a need for the individual to pay the ransom.

Technical details

File Info:

crc32: 0D2D4033
md5: 7a15645d785d718ecfc1830e1e64b48b
name: 7A15645D785D718ECFC1830E1E64B48B.mlw
sha1: a386441f921a177b4c4dbda0e618ef23afa3cfc9
sha256: 89da68ad239f14a7b4fd03402585d56a3a24bb37c14b22f968a5633144c65253
sha512: 806ddd18daf69ce9daa98efdc138d22af1a6a8389011ca1bba30a74241b162d5fe66044255a44733d28e7f50287e1bb80971f7642940c9eebf4edd1defe5cf85
ssdeep: 3072:41jdIhDC7eDK5UL4Tcugrk77cSbLtGVm6dOXgYO5sm:4xKhDCqDK594ugrk7/tQm66jm
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright:
FileVersion:
CompanyName: Scott Brogden
Comments: This installation was built with Inno Setup.
ProductName: Ditto
ProductVersion:
FileDescription: Ditto Setup
Translation: 0x0000 0x04b0

Ransom:Win32/Crowti also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.3716
Cynet Malicious (score: 100)
ALYac Trojan.Ransom.AOQ
Cylance Unsafe
Zillya Trojan.Cryptodef.Win32.2442
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (W)
Alibaba TrojanDropper:Win32/dropper.ali1003001
K7GW Trojan ( 0055e3ef1 )
K7AntiVirus Trojan ( 0055e3ef1 )
Symantec Ransom.Cryptodefense
ESET-NOD32 Win32/Filecoder.CryptoWall.G
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky Trojan-Ransom.Win32.Cryptodef.adrk
BitDefender Trojan.Ransom.AOQ
NANO-Antivirus Trojan.Win32.AD.eaapel
MicroWorld-eScan Trojan.Ransom.AOQ
Tencent Malware.Win32.Gencirc.114c3b0e
Ad-Aware Trojan.Ransom.AOQ
Sophos Mal/Generic-S
Comodo Malware@#1jjyb12gdvp6d
F-Secure Heuristic.HEUR/AGEN.1121426
BitDefenderTheta Gen:NN.ZexaF.34608.hm1@aKbfrqiO
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_CRYPWALL.F117IS
McAfee-GW-Edition BehavesLike.Win32.Triusor.ch
FireEye Generic.mg.7a15645d785d718e
Emsisoft Trojan.Ransom.AOQ (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Cryptodef.acn
Avira HEUR/AGEN.1121426
Antiy-AVL Trojan/Win32.BTSGeneric
Microsoft Ransom:Win32/Crowti
Arcabit Trojan.Ransom.AOQ
ZoneAlarm Trojan-Ransom.Win32.Cryptodef.adrk
GData Trojan.Ransom.AOQ
AhnLab-V3 Trojan/Win32.Crowti.C1322110
Acronis suspicious
McAfee RDN/Ransom.cz
MAX malware (ai score=100)
VBA32 OScope.Malware-Cryptor.Cobalt
Malwarebytes Malware.Heuristic.1004
Panda Trj/CI.A
TrendMicro-HouseCall Ransom_CRYPWALL.F117IS
Rising Ransom.Crowti!8.37D (CLOUD)
Yandex Trojan.Cryptodef!U67B7SoCHU4
Ikarus Trojan.Win32.Filecoder
Fortinet W32/Filecoder_CryptoWall.G!tr
AVG Win32:Trojan-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Cryptodef.HxQBum0A

How to remove Ransom:Win32/Crowti 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 Ransom:Win32/Crowti 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/Crowti 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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