MSIL/Filecoder.Jigsaw.B

What is MSIL/Filecoder.Jigsaw.B infection?

In this article you will find regarding the interpretation of MSIL/Filecoder.Jigsaw.B as well as its unfavorable influence on your computer system. Such ransomware are a form of malware that is specified by online frauds to demand paying the ransom by a target.

Most of the instances, MSIL/Filecoder.Jigsaw.B virus will advise its targets to start funds transfer for the objective of neutralizing the modifications that the Trojan infection has actually introduced to the sufferer’s tool.

MSIL/Filecoder.Jigsaw.B Summary

These alterations 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.

  • 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;
  • Creates a copy of itself;
  • Ciphering the records found on the target’s disk drive — so the victim can no more utilize the information;
  • Preventing routine 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.

MSIL/Filecoder.Jigsaw.B

One of the most typical channels where MSIL/Filecoder.Jigsaw.B Ransomware are infused are:

  • By ways of phishing e-mails;
  • As a consequence of user ending up on a source that hosts a malicious software application;

As soon as the Trojan is successfully injected, it will either cipher the information on the victim’s PC or stop the gadget from working in a correct way – while likewise putting a ransom note that discusses the demand for the targets to impact the repayment for the purpose of decrypting the documents or restoring the documents system back to the first condition. In many circumstances, the ransom note will certainly turn up when the customer reboots the COMPUTER after the system has actually currently been damaged.

MSIL/Filecoder.Jigsaw.B circulation channels.

In numerous corners of the world, MSIL/Filecoder.Jigsaw.B grows by leaps and bounds. However, the ransom money notes as well as methods of obtaining the ransom money quantity might vary depending on particular regional (local) setups. The ransom notes and also techniques of extorting the ransom quantity may differ depending on particular local (regional) setups.

Ransomware injection

For example:

    Faulty alerts regarding unlicensed software.

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

    Faulty declarations regarding prohibited content.

    In countries where software program piracy is much less prominent, this technique is not as efficient for the cyber frauds. Conversely, the MSIL/Filecoder.Jigsaw.B popup alert may falsely declare to be originating from a law enforcement institution as well as will report having located child porn or other prohibited information on the gadget.

    MSIL/Filecoder.Jigsaw.B popup alert might wrongly assert to be deriving from a law enforcement institution and also will report having located child porn or various other illegal information on the tool. The alert will in a similar way contain a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: ACEDBCB4md5: 68d07c3d4ce9af16e26905764ef42ce9name: 68D07C3D4CE9AF16E26905764EF42CE9.mlwsha1: d9245df6a5e375f6072fa64812f11cbba6177b70sha256: 7b9f60becb5d50b1f4279c99f9292e63dcb961f5e35bd4e78129432f43b5f368sha512: 0db8e2f9750dca1850b6913111d96db7f755ef2df7b8e3e75c7781f72596fcd3c01c16c8943d61a355951637f6efe02a9234d68eac908f4b243b2203f219ef4bssdeep: 6144:ZS0YNvRLUClK2oKaOsZMm3iH+UmNUwpNXMZVxYgzt:Q0SAClVsMQiHrBwpGXxtype: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0LegalCopyright: Bitcoin Private Generator Activated V2.4Assembly Version: 37.0.2.5583InternalName: Bitcoin Private Generator Activated V2.4.exeFileVersion: 2.4CompanyName: Bitcoin Private Generator Activated V2.4LegalTrademarks: Bitcoin Private Generator Activated V2.4Comments: Bitcoin Private Generator Activated V2.4ProductName: Bitcoin Private Generator Activated V2.4ProductVersion: 2.4FileDescription: Bitcoin Private Generator Activated V2.4OriginalFilename: Bitcoin Private Generator Activated V2.4.exe

MSIL/Filecoder.Jigsaw.B also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 700000121 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop8.34821
Cynet Malicious (score: 85)
ALYac Trojan.Ransom.Jigsaw
Cylance Unsafe
Zillya Trojan.Filecoder.Win32.8062
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_60% (D)
Alibaba Ransom:MSIL/JigsawLocker.0e7f4c80
K7GW Trojan ( 700000121 )
Cybereason malicious.d4ce9a
Cyren W32/Filecoder.AQ.gen!Eldorado
Symantec Ransom.Jigsaw
ESET-NOD32 a variant of MSIL/Filecoder.Jigsaw.B
APEX Malicious
Avast MSIL:JigSaw-A [Trj]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Generic.Ransom.Hiddentear.A.B84EACA0
NANO-Antivirus Trojan.Win32.Filecoder.fgpefj
MicroWorld-eScan Generic.Ransom.Hiddentear.A.B84EACA0
Tencent Win32.Trojan.Raas.Auto
Ad-Aware Generic.Ransom.Hiddentear.A.B84EACA0
Sophos Troj/Jigsaw-K
Comodo Malware@#3qynyjszijhqw
BitDefenderTheta Gen:NN.ZemsilF.34608.sm0@aCGUxD
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom.MSIL.JIGSAW.SM
McAfee-GW-Edition GenericRXDW-TQ!68D07C3D4CE9
FireEye Generic.Ransom.Hiddentear.A.B84EACA0
Emsisoft Generic.Ransom.Hiddentear.A.B84EACA0 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1126343
Microsoft Ransom:MSIL/JigsawLocker.A
AegisLab Trojan.Win32.Generic.4!c
GData Generic.Ransom.Hiddentear.A.B84EACA0
AhnLab-V3 Win-Trojan/JigsawLocker.Gen
McAfee GenericRXDW-TQ!68D07C3D4CE9
MAX malware (ai score=100)
Malwarebytes Ransom.Jigsaw.Generic
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom.MSIL.JIGSAW.SM
Rising Ransom.JigsawLocker!8.52DD (CLOUD)
Yandex Trojan.Agent!7KGidhGGeTw
Ikarus Trojan-Ransom.JigSaw
Fortinet MSIL/Jigsaw.B!tr
AVG MSIL:JigSaw-A [Trj]
Paloalto generic.ml
Qihoo-360 Win32/Trojan.ac2

How to remove MSIL/Filecoder.Jigsaw.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

Run the setup file.

Run Setup.exe
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 Scanning

Click on “Clean Now”.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

Full version of GridinSoft

If the guide doesn’t help you to remove MSIL/Filecoder.Jigsaw.B you can always ask me in the comments for getting help.

References

    About the author

    Robert Bailey

    Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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