Ransom:MSIL/JigsawLocker.B

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

What is Ransom:MSIL/JigsawLocker.B infection?

In this article you will discover concerning the definition of Ransom:MSIL/JigsawLocker.B and also its negative influence on your computer. Such ransomware are a kind of malware that is elaborated by on the internet frauds to demand paying the ransom by a sufferer.

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In the majority of the cases, Ransom:MSIL/JigsawLocker.B virus will advise its victims to start funds move for the function of counteracting the modifications that the Trojan infection has actually introduced to the sufferer’s device.

Ransom:MSIL/JigsawLocker.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.
  • 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.
  • 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.

  • 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;
  • Mimics icon used for popular non-executable file format;
  • Unusual version info supplied for binary;
  • Ciphering the records found on the sufferer’s hard disk drive — so the victim can no more use the information;
  • Preventing normal accessibility 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:MSIL/JigsawLocker.B

One of the most typical networks whereby Ransom:MSIL/JigsawLocker.B Trojans are injected are:

  • By ways of phishing e-mails;
  • As an effect of individual ending up on a resource that hosts a destructive software;

As quickly as the Trojan is successfully infused, it will certainly either cipher the data on the sufferer’s computer or protect against the device from working in a correct fashion – while also placing a ransom money note that states the need for the sufferers to impact the payment for the purpose of decrypting the files or restoring the data system back to the first problem. In a lot of circumstances, the ransom money note will certainly turn up when the client restarts the COMPUTER after the system has already been harmed.

Ransom:MSIL/JigsawLocker.B distribution networks.

In numerous edges of the world, Ransom:MSIL/JigsawLocker.B grows by jumps as well as bounds. Nonetheless, the ransom notes and also tricks of extorting the ransom money amount might vary depending upon particular neighborhood (regional) settings. The ransom money notes and tricks of extorting the ransom quantity may vary depending on particular neighborhood (local) settings.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software program.

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

    Faulty declarations regarding unlawful content.

    In nations where software application piracy is less prominent, this method is not as effective for the cyber fraudulences. Conversely, the Ransom:MSIL/JigsawLocker.B popup alert might falsely declare to be originating from a law enforcement establishment and also will certainly report having situated kid pornography or various other prohibited information on the tool.

    Ransom:MSIL/JigsawLocker.B popup alert might falsely declare to be obtaining from a regulation enforcement establishment and also will certainly report having located youngster pornography or various other illegal information on the device. The alert will likewise consist of a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: 8D0E756A
md5: 8c4981ef36d47deaac1a52b5f4533624
name: 8C4981EF36D47DEAAC1A52B5F4533624.mlw
sha1: f14ffba71a8ebb60565570670a8071921a63ad54
sha256: 72f669869aed508d7bf4ed2499ca8d42c94e1680c811432c206f16eda4f30a8b
sha512: 25eec1e5e80866b113044724e460761eb61f490235a03b979800df74e2f35f388640956aa3bbf219be11615925839f1b89d4922d592cd0e51f4a72f5fc02c784
ssdeep: 3072:GwCSK5ljCjUQ7ei2YYlNDQVWJ+jRfm/JjYU2Xt+C:GHSUQ752YYlNDQVWJ+jRfm5E9+
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright 2002-2017 Microsoft developers. All rights reserved.
Assembly Version: 38.0.7.5483
InternalName: Setup.exe
FileVersion: 38.0.7.5483
CompanyName:
LegalTrademarks:
Comments:
ProductName: Winmap
ProductVersion: 38.0.7.5483
FileDescription: Winmap
OriginalFilename: Setup.exe

Ransom:MSIL/JigsawLocker.B also known as:

GridinSoftTrojan.Ransom.Gen
DrWebTrojan.Encoder.24707
CynetMalicious (score: 99)
ALYacTrojan.Ransom.Jigsaw
CylanceUnsafe
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_80% (D)
AlibabaTrojan:MSIL/Filecoder.39e0603c
K7GWTrojan ( 004e57db1 )
K7AntiVirusTrojan ( 004e57db1 )
ESET-NOD32a variant of MSIL/Filecoder.Jigsaw.C
APEXMalicious
AvastWin32:Malware-gen
KasperskyHEUR:Trojan-Ransom.Win32.Generic
BitDefenderTrojan.GenericKD.40527523
NANO-AntivirusTrojan.Win32.Encoder.eyibwn
ViRobotTrojan.Win32.S.Ransom.148992
MicroWorld-eScanTrojan.GenericKD.40527523
TencentWin32.Trojan.Raas.Auto
Ad-AwareTrojan.GenericKD.40527523
SophosMal/Jigsaw-A
ComodoMalware@#1jvgzhge00e5x
BitDefenderThetaGen:NN.ZemsilF.34670.jm0@ayog1!n
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionGeneric.dax
FireEyeGeneric.mg.8c4981ef36d47dea
EmsisoftTrojan.GenericKD.40527523 (B)
SentinelOneStatic AI – Malicious PE
AviraHEUR/AGEN.1116474
MicrosoftRansom:MSIL/JigsawLocker.B
AegisLabTrojan.Win32.Generic.4!c
GDataTrojan.GenericKD.40527523
TACHYONRansom/W32.DN-Jigsaw.148992
AhnLab-V3Trojan/Win32.Ransom.C2443031
McAfeeGeneric.dax
MalwarebytesRansom.Jigsaw
PandaTrj/GdSda.A
RisingRansom.JigsawLocker!8.52DD (C64:YzY0Or/pyhZvE4y7)
IkarusTrojan-Ransom.FileCrypter
FortinetMSIL/Jigsaw.B!tr.ransom
AVGWin32:Malware-gen
Paloaltogeneric.ml
Qihoo-360Win32/Trojan.5a2

How to remove Ransom:MSIL/JigsawLocker.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:MSIL/JigsawLocker.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:MSIL/JigsawLocker.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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