MSIL/Filecoder.AFL

Written by Robert Bailey

What is MSIL/Filecoder.AFL infection?

In this post you will find concerning the definition of MSIL/Filecoder.AFL and also its unfavorable impact on your computer system. Such ransomware are a kind of malware that is specified by online fraudulences to demand paying the ransom money by a sufferer.

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Most of the cases, MSIL/Filecoder.AFL virus will certainly advise its sufferers to initiate funds move for the objective of reducing the effects of the changes that the Trojan infection has presented to the sufferer’s device.

MSIL/Filecoder.AFL 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.
  • 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.;
  • 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
  • Checks the version of Bios, possibly for anti-virtualization;
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Creates a copy of itself;
  • Appends a known CryLocker ransomware file extension to files that have been encrypted;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Ciphering the records located on the victim’s hard disk drive — so the sufferer can no longer make use of the information;
  • Preventing regular accessibility to the target’s workstation;

MSIL/Filecoder.AFL

One of the most typical networks where MSIL/Filecoder.AFL are injected are:

  • By ways of phishing emails;
  • As an effect of individual winding up on a resource that hosts a malicious software application;

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the victim’s computer or stop the gadget from operating in a correct way – while also placing a ransom note that points out the demand for the sufferers to effect the payment for the objective of decrypting the papers or bring back the data system back to the initial condition. In most instances, the ransom money note will certainly show up when the client restarts the PC after the system has actually already been damaged.

MSIL/Filecoder.AFL circulation networks.

In different edges of the world, MSIL/Filecoder.AFL expands by leaps as well as bounds. However, the ransom notes and tricks of obtaining the ransom amount may differ relying on specific neighborhood (local) setups. The ransom notes and techniques of extorting the ransom quantity might vary depending on particular regional (local) setups.

Ransomware injection

As an example:

    Faulty signals regarding unlicensed software.

    In specific locations, the Trojans commonly wrongfully report having identified some unlicensed applications made it possible for on the target’s gadget. The sharp after that demands the user to pay the ransom.

    Faulty statements concerning unlawful material.

    In nations where software piracy is much less prominent, this technique is not as reliable for the cyber scams. Alternatively, the MSIL/Filecoder.AFL popup alert might incorrectly assert to be stemming from a police establishment and also will report having situated youngster porn or other unlawful information on the device.

    MSIL/Filecoder.AFL popup alert might wrongly claim to be obtaining from a law enforcement institution as well as will report having situated youngster pornography or various other unlawful data on the gadget. The alert will in a similar way have a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 985EF7BD
md5: ac7fed80ccbf3a46db206d88b51a46c0
name: AC7FED80CCBF3A46DB206D88B51A46C0.mlw
sha1: 5c1ec87c838b652de02f65d748e55e52a2812c73
sha256: 1b42b1c3e65e9057a687e6057e60c2aec93e6fb66dab6e68bdc24de605fbf7a9
sha512: 9f4461f507fd1424f5da8d2dfe710574949e504e4cf010cda8d9011a4b95a0c4c3ac18c4abe901fa82c50c5445640afaf3085f57c4bfb7704dfa007aba3721d7
ssdeep: 3072:qk8bx9YtlSHPOpRZkbISJhXgRo2o41q8lh8Fuz+WSMzbrsfyb50E3QBSfUqK1K3:AK+4RJq8wFu1Cyd0E3QMfhqK3ch
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

0: [No Data]

MSIL/Filecoder.AFL also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop16.31173
CAT-QuickHeal Trojan.YakbeexMSIL.ZZ4
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
BitDefender Gen:Heur.Ransom.HiddenTears.1
Cybereason malicious.0ccbf3
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Filecoder.AFL
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan-Ransom.Win32.Generic
MicroWorld-eScan Gen:Heur.Ransom.HiddenTears.1
Ad-Aware Gen:Heur.Ransom.HiddenTears.1
Sophos ML/PE-A
F-Secure Trojan.TR/Dropper.Gen
BitDefenderTheta Gen:NN.ZemsilF.34678.nmW@a4H!JCj
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
FireEye Generic.mg.ac7fed80ccbf3a46
Emsisoft Gen:Heur.Ransom.HiddenTears.1 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Dropper.Gen
Microsoft Ransom:MSIL/NoCry.AS!MTB
Arcabit Trojan.Ransom.HiddenTears.1
GData Gen:Heur.Ransom.HiddenTears.1
AhnLab-V3 Trojan/Win32.Dynamer.C4381802
Acronis suspicious
MAX malware (ai score=82)
Malwarebytes MachineLearning/Anomalous.95%
Fortinet MSIL/Filecoder.TA!tr
Qihoo-360 HEUR/QVM03.0.AC87.Malware.Gen

How to remove MSIL/Filecoder.AFL 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 MSIL/Filecoder.AFL 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.AFL 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/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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