Ransom:Win32/Shieldcrypt.A

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

What is Ransom:Win32/Shieldcrypt.A infection?

In this short article you will certainly find regarding the meaning of Ransom:Win32/Shieldcrypt.A as well as its negative impact on your computer system. Such ransomware are a kind of malware that is clarified by online scams to demand paying the ransom by a sufferer.

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In the majority of the cases, Ransom:Win32/Shieldcrypt.A ransomware will instruct its targets to launch funds move for the objective of neutralizing the changes that the Trojan infection has actually presented to the target’s device.

Ransom:Win32/Shieldcrypt.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.
  • 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.
  • Unconventionial language used in binary resources: Romanian;
  • 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;
  • 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;
  • Writes a potential ransom message to disk;
  • Creates a copy of itself;
  • Appends a known CryptoShield ransomware file extension to files that have been encrypted;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the target’s hard disk drive — so the target can no more use the information;
  • Preventing regular 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/Shieldcrypt.A

The most typical networks through which Ransom:Win32/Shieldcrypt.A Trojans are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a repercussion of individual winding up on a source that holds a destructive software program;

As quickly as the Trojan is successfully injected, it will either cipher the information on the victim’s PC or prevent the device from working in a correct way – while additionally placing a ransom money note that points out the requirement for the victims to effect the settlement for the purpose of decrypting the records or restoring the documents system back to the first condition. In many circumstances, the ransom money note will turn up when the client reboots the PC after the system has already been harmed.

Ransom:Win32/Shieldcrypt.A circulation channels.

In various edges of the world, Ransom:Win32/Shieldcrypt.A grows by leaps and bounds. Nevertheless, the ransom money notes as well as methods of extorting the ransom money quantity might vary relying on particular neighborhood (regional) settings. The ransom money notes and also tricks of extorting the ransom quantity may differ depending on specific regional (local) setups.

Ransomware injection

For instance:

    Faulty notifies concerning unlicensed software program.

    In certain areas, the Trojans often wrongfully report having actually spotted some unlicensed applications enabled on the target’s gadget. The alert then demands the customer to pay the ransom money.

    Faulty declarations regarding prohibited material.

    In countries where software piracy is much less popular, this approach is not as efficient for the cyber frauds. Alternatively, the Ransom:Win32/Shieldcrypt.A popup alert may wrongly declare to be stemming from a police establishment and will certainly report having situated child pornography or other prohibited data on the tool.

    Ransom:Win32/Shieldcrypt.A popup alert might falsely assert to be deriving from a law enforcement organization and will certainly report having situated youngster pornography or other prohibited data on the device. The alert will likewise have a need for the user to pay the ransom money.

Technical details

File Info:

crc32: BC93E186
md5: b4430540f3f8ba43db591332d8b41b50
name: B4430540F3F8BA43DB591332D8B41B50.mlw
sha1: 4c6684ac10a367ab937142226d1f23d2b0d92145
sha256: 29a4bc560905120eae7c6c4300a6c5133b1ea19ed36cdad7bb98f3db1e838ceb
sha512: 017c58b5876c8e082adf04d4e1c481fd71d09bb26ce7bec17aab04dc29386d629e5d7f877d35b27dc86d7cbb83d208bc79b4c25ad5a3c1e484e35ae74e5f93c3
ssdeep: 1536:wAPQdmbcvwcNOM7hsWjcdgqNcOgzUcY7FCphpBOLAORAZyjpfgEkPEtqE:wKQIoL3iJkzfaFCph2LeyRp
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 1994 - 2017
InternalName: Dahl og Solli NUF
FileVersion: 15.21.22.12
CompanyName: Dahl og Solli NUF
ProductVersion: 15.21.22.12
FileDescription: Dahl og Solli NUF
Translation: 0x1c1a 0x04b0

Ransom:Win32/Shieldcrypt.A also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
DrWebTrojan.Encoder.10240
CynetMalicious (score: 100)
ALYacTrojan.Ransom.CryptoShield
CylanceUnsafe
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_90% (D)
AlibabaRansom:Win32/generic.ali2000010
K7GWTrojan ( 0056e91c1 )
K7AntiVirusTrojan ( 0056e91c1 )
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win32/Kryptik.FPDP
APEXMalicious
AvastFileRepMalware
KasperskyTrojan-Dropper.Win32.Dycler.ypy
BitDefenderGen:Variant.Ransom.HydraPack.1
NANO-AntivirusTrojan.Win32.Scatter.falcwm
MicroWorld-eScanGen:Variant.Ransom.HydraPack.1
TencentWin32.Trojan.Raas.Auto
Ad-AwareGen:Variant.Ransom.HydraPack.1
SophosMal/Generic-S
ComodoMalware@#7142pga59h3b
F-SecureHeuristic.HEUR/AGEN.1110109
BitDefenderThetaGen:NN.ZexaF.34608.hq0@aG4Y0TlO
VIPREBehavesLike.Win32.Malware.rwx (mx-v)
TrendMicroRansom_CRYPAURA.SHLDD
McAfee-GW-EditionBehavesLike.Win32.Generic.ch
FireEyeGeneric.mg.b4430540f3f8ba43
EmsisoftGen:Variant.Ransom.HydraPack.1 (B)
SentinelOneStatic AI – Suspicious PE
JiangminTrojanDropper.Dycler.oq
AviraHEUR/AGEN.1110109
eGambitUnsafe.AI_Score_99%
MicrosoftRansom:Win32/Shieldcrypt.A
ArcabitTrojan.Ransom.HydraPack.1
AegisLabTrojan.Win32.Generic.4!c
ZoneAlarmTrojan-Dropper.Win32.Dycler.ypy
GDataGen:Variant.Ransom.HydraPack.1
TACHYONRansom/W32.CryptoShield.115200
AhnLab-V3Trojan/Win32.CryptoShield.C1821900
McAfeeArtemis!B4430540F3F8
MAXmalware (ai score=100)
VBA32TrojanDropper.Dycler
MalwarebytesGeneric.Malware/Suspicious
PandaTrj/CI.A
TrendMicro-HouseCallRansom_CRYPAURA.SHLDD
RisingRansom.Fury!8.470A (TFE:5:QMU8U09V5WH)
YandexTrojan.GenAsa!nxRktZ7LWxs
IkarusTrojan.Win32.Crypt
FortinetW32/Kryptik.FPDP!tr
AVGFileRepMalware
Paloaltogeneric.ml
Qihoo-360Win32/TrojanDropper.Generic.HgIASOkA

How to remove Ransom:Win32/Shieldcrypt.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/Shieldcrypt.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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Full version of GridinSoft Anti-Malware

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