Ransom:Win32/Cryproto.A

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

What is Ransom:Win32/Cryproto.A infection?

In this post you will certainly find regarding the definition of Ransom:Win32/Cryproto.A as well as its unfavorable influence on your computer. Such ransomware are a kind of malware that is clarified by on-line frauds to demand paying the ransom money by a sufferer.

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In the majority of the instances, Ransom:Win32/Cryproto.A infection will certainly advise its sufferers to launch funds transfer for the objective of neutralizing the changes that the Trojan infection has introduced to the target’s gadget.

Ransom:Win32/Cryproto.A Summary

These modifications 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.
  • Compression (or decompression);
  • 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.

  • 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.
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Steals private information from local Internet browsers;
  • 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
  • Exhibits possible ransomware file modification behavior;
  • 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;
  • Ciphering the records situated on the victim’s hard disk — so the target can no more use the data;
  • Preventing normal access to the sufferer’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/Cryproto.A

One of the most normal networks whereby Ransom:Win32/Cryproto.A Trojans are infused are:

  • By ways of phishing emails;
  • As a repercussion of customer winding up on a source that holds a destructive software program;

As soon as the Trojan is effectively infused, it will either cipher the information on the target’s PC or prevent the tool from operating in a proper manner – while likewise placing a ransom money note that states the requirement for the sufferers to effect the settlement for the function of decrypting the documents or recovering the file system back to the initial problem. In the majority of circumstances, the ransom note will certainly show up when the client restarts the PC after the system has currently been harmed.

Ransom:Win32/Cryproto.A distribution networks.

In different corners of the globe, Ransom:Win32/Cryproto.A grows by leaps and also bounds. Nevertheless, the ransom notes as well as tricks of extorting the ransom quantity may vary depending upon certain regional (regional) settings. The ransom notes and techniques of obtaining the ransom money quantity might differ depending on certain local (regional) settings.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software program.

    In specific locations, the Trojans usually wrongfully report having identified some unlicensed applications enabled on the victim’s gadget. The alert then demands the user to pay the ransom money.

    Faulty statements regarding prohibited web content.

    In nations where software program piracy is less prominent, this approach is not as reliable for the cyber frauds. Additionally, the Ransom:Win32/Cryproto.A popup alert may falsely declare to be deriving from a law enforcement organization as well as will report having situated youngster porn or various other illegal data on the tool.

    Ransom:Win32/Cryproto.A popup alert may incorrectly assert to be deriving from a legislation enforcement establishment and also will certainly report having situated child pornography or other prohibited information on the tool. The alert will likewise consist of a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: 8E58675E
md5: cfb8bcd8d9caa31570e0a4f46534d830
name: CFB8BCD8D9CAA31570E0A4F46534D830.mlw
sha1: 72d87cbb8dee27a41a7a88e07e32d031ea3d6472
sha256: 91d4be744d7f34bb26cd396a8a0379349aeaf2e0b16ed65b972fb2c0895fe9fe
sha512: a06b1db4bcab8d974a99c447561aa2fdda17ce38be02d5e1c239a14de811cb32710ce51c0604275e3323bd89b1f9d487f07cee6a8326288f91a66b356abeb996
ssdeep: 1536:mVzxGglPTlVIB0ExVFKr0MOvmP0+snXJrX:4zR/IbgrXO+PGXJr
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/Cryproto.A also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
K7AntiVirusTrojan ( 0055e3ef1 )
Elasticmalicious (high confidence)
DrWebTrojan.Encoder.1214
CynetMalicious (score: 100)
ALYacGen:Trojan.NetworkWorm.dqW@au3PZMcG
CylanceUnsafe
ZillyaTrojan.RotoCrypt.Win32.1
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (D)
AlibabaRansom:Win32/generic.ali2000027
K7GWTrojan ( 0055e3ef1 )
Cybereasonmalicious.8d9caa
SymantecTrojan.Gen.2
ESET-NOD32Win32/Filecoder.RotoCrypt.A
APEXMalicious
AvastWin32:Malware-gen
KasperskyTrojan.Win32.Waldek.calc
BitDefenderGen:Trojan.NetworkWorm.dqW@au3PZMcG
NANO-AntivirusTrojan.Win32.Crypren.dtvryh
MicroWorld-eScanGen:Trojan.NetworkWorm.dqW@au3PZMcG
TencentWin32.Trojan.Rotor.Tdfs
Ad-AwareGen:Trojan.NetworkWorm.dqW@au3PZMcG
SophosMal/Generic-S
BitDefenderThetaGen:NN.ZexaF.34678.dqW@au3PZMcG
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionBehavesLike.Win32.Emotet.km
FireEyeGeneric.mg.cfb8bcd8d9caa315
EmsisoftGen:Trojan.NetworkWorm.dqW@au3PZMcG (B)
SentinelOneStatic AI – Malicious PE
JiangminTrojan.Generic.cbdkz
AviraHEUR/AGEN.1124212
eGambitGeneric.Malware
KingsoftWin32.Heur.KVMH017.a.(kcloud)
MicrosoftRansom:Win32/Cryproto.A
ArcabitTrojan.NetworkWorm.ED6A73
AegisLabTrojan.Win32.Crypren.j!c
ZoneAlarmTrojan.Win32.Waldek.calc
GDataGen:Trojan.NetworkWorm.dqW@au3PZMcG
Acronissuspicious
McAfeeArtemis!CFB8BCD8D9CA
MAXmalware (ai score=99)
MalwarebytesMachineLearning/Anomalous.100%
PandaTrj/Genetic.gen
RisingRansom.Cryproto!8.2D8D (CLOUD)
YandexTrojan.Rotor!nX4Q2jIjmtg
IkarusTrojan.Win32.Filecoder
FortinetW32/Crypren.NEL!tr
AVGWin32:Malware-gen
Paloaltogeneric.ml
Qihoo-360Win32/TrojanPSW.Gootkit.HgAASREA

How to remove Ransom:Win32/Cryproto.A ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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/Cryproto.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:

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If the guide doesn’t help you to remove Ransom:Win32/Cryproto.A 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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