MSIL/Filecoder.Jigsaw.X

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

What is MSIL/Filecoder.Jigsaw.X infection?

In this short article you will certainly find regarding the interpretation of MSIL/Filecoder.Jigsaw.X and its adverse effect 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 sufferer.

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Most of the cases, MSIL/Filecoder.Jigsaw.X virus will certainly advise its targets to initiate funds transfer for the objective of counteracting the changes that the Trojan infection has actually presented to the sufferer’s device.

MSIL/Filecoder.Jigsaw.X 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.
  • 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.
  • 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;
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Creates a copy of itself;
  • Appends a known Locked ransomware file extension to files that have been encrypted;
  • Ciphering the files situated on the victim’s hard drive — so the victim can no longer make use of 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.

MSIL/Filecoder.Jigsaw.X

One of the most typical networks whereby MSIL/Filecoder.Jigsaw.X Ransomware Trojans are infused 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 customer ending up on a source that organizes a malicious software;

As quickly as the Trojan is effectively infused, it will certainly either cipher the data on the victim’s PC or avoid the tool from functioning in a proper manner – while additionally putting a ransom note that mentions the requirement for the victims to impact the payment for the objective of decrypting the records or recovering the documents system back to the first problem. In most instances, the ransom money note will turn up when the client restarts the PC after the system has actually already been harmed.

MSIL/Filecoder.Jigsaw.X distribution channels.

In numerous corners of the world, MSIL/Filecoder.Jigsaw.X expands by jumps as well as bounds. Nonetheless, the ransom money notes and also tricks of obtaining the ransom money quantity may differ depending upon certain neighborhood (local) settings. The ransom notes and tricks of extorting the ransom amount may differ depending on particular local (local) setups.

Ransomware injection

For example:

    Faulty informs about unlicensed software.

    In certain areas, the Trojans often wrongfully report having spotted some unlicensed applications made it possible for on the target’s device. The sharp after that requires the individual to pay the ransom money.

    Faulty statements concerning illegal content.

    In nations where software program piracy is much less prominent, this approach is not as reliable for the cyber scams. Alternatively, the MSIL/Filecoder.Jigsaw.X popup alert might incorrectly assert to be deriving from a law enforcement organization as well as will certainly report having located child pornography or various other unlawful information on the device.

    MSIL/Filecoder.Jigsaw.X popup alert might wrongly assert to be obtaining from a regulation enforcement organization and also will certainly report having situated youngster pornography or various other illegal data on the device. The alert will likewise have a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 638D944D
md5: 48535525c0ce1f11eb17ede9683058a2
name: 48535525C0CE1F11EB17EDE9683058A2.mlw
sha1: 97691c62a24a31d0a569a3bc2be8e5db3d3a54a1
sha256: e9203a2a046c3209d8dd1dad6e68f8f9ec58fca26e042e8a885130d0e77a92d1
sha512: 4f9de98afba6e57d408516ffe47f394257a1963a457f0712d6d05efaae59357bd640ccf141a2880552fb3f70c97ed495f43f31b24f33a00af444f80918b8ad89
ssdeep: 6144:m7cFtYKo8Kr7bBcQ/SKHIZZVxYgaYERT:Ur7VckMXxtaT
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright 1999-2012 adobe and flash developers. All rights reserved.
Assembly Version: 37.0.2.5583
InternalName: AlbCry.exe
FileVersion: 37.0.2.5583
CompanyName:
LegalTrademarks:
Comments:
ProductName: AlbCry 2.0
ProductVersion: 37.0.2.5583
FileDescription: AlbCry
OriginalFilename: AlbCry.exe

MSIL/Filecoder.Jigsaw.X also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 00545b621 )
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
ALYac Trojan.Ransom.Jigsaw
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (W)
Alibaba Ransom:MSIL/Filecoder.61f87ce4
K7GW Trojan ( 00545b621 )
Cybereason malicious.5c0ce1
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Filecoder.Jigsaw.X
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky HEUR:Trojan-Ransom.MSIL.Crypren.gen
BitDefender Generic.MSIL.Ransomware.Jigsaw.1B3F2E3C
NANO-Antivirus Trojan.Win32.Ransom.ieiszg
MicroWorld-eScan Generic.MSIL.Ransomware.Jigsaw.1B3F2E3C
Tencent Msil.Trojan.Crypren.Pcsp
Ad-Aware Generic.MSIL.Ransomware.Jigsaw.1B3F2E3C
Sophos Mal/Generic-S
Comodo Malware@#367e9j4wy09at
BitDefenderTheta Gen:NN.ZemsilF.34738.nq0@aeojgbk
FireEye Generic.mg.48535525c0ce1f11
Emsisoft Generic.MSIL.Ransomware.Jigsaw.1B3F2E3C (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1128561
eGambit Unsafe.AI_Score_99%
Microsoft Ransom:MSIL/Cryptolocker.PDA!MTB
GData MSIL.Trojan-Ransom.Jigsaw.J
AhnLab-V3 Malware/Win32.RL_Generic.C4263072
MAX malware (ai score=82)
Malwarebytes Ransom.Jigsaw
Panda Trj/GdSda.A
Yandex Trojan.Filecoder!fCUzTmC5k/k
Ikarus Trojan-Ransom.JigSaw
MaxSecure Trojan.Malware.73710288.susgen
Fortinet MSIL/Filecoder_Jigsaw.K!tr
AVG Win32:Trojan-gen
Paloalto generic.ml

How to remove MSIL/Filecoder.Jigsaw.X 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 MSIL/Filecoder.Jigsaw.X 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 MSIL/Filecoder.Jigsaw.X 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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