Win32/Filecoder.W

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

What is Win32/Filecoder.W infection?

In this article you will certainly locate about the interpretation of Win32/Filecoder.W as well as its negative effect on your computer. Such ransomware are a form of malware that is clarified by on-line fraudulences to demand paying the ransom money by a sufferer.

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In the majority of the cases, Win32/Filecoder.W virus will certainly advise its targets to launch funds move for the function of neutralizing the amendments that the Trojan infection has introduced to the sufferer’s tool.

Win32/Filecoder.W Summary

These modifications can be as follows:

  • 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 binary language: Russian;
  • 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
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records situated on the target’s disk drive — so the sufferer can no more make use of the data;
  • Preventing regular accessibility to the victim’s workstation;

Win32/Filecoder.W

One of the most typical networks where Win32/Filecoder.W Trojans are injected are:

  • By methods of phishing emails;
  • As a repercussion of individual winding up on a source that organizes a malicious software application;

As quickly as the Trojan is successfully injected, it will either cipher the data on the victim’s computer or prevent the gadget from functioning in a proper manner – while also putting a ransom note that points out the demand for the victims to effect the repayment for the purpose of decrypting the documents or recovering the file system back to the first problem. In most circumstances, the ransom note will certainly turn up when the customer reboots the PC after the system has already been damaged.

Win32/Filecoder.W circulation channels.

In various corners of the world, Win32/Filecoder.W grows by jumps as well as bounds. However, the ransom money notes and also techniques of obtaining the ransom quantity may vary depending upon particular regional (local) setups. The ransom money notes and tricks of obtaining the ransom amount may vary depending on particular neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty signals about unlicensed software application.

    In particular locations, the Trojans commonly wrongfully report having actually found some unlicensed applications allowed on the victim’s gadget. The sharp after that demands the individual to pay the ransom.

    Faulty statements about unlawful web content.

    In nations where software application piracy is much less prominent, this method is not as efficient for the cyber scams. Alternatively, the Win32/Filecoder.W popup alert may incorrectly declare to be deriving from a police institution as well as will certainly report having situated child porn or various other prohibited data on the gadget.

    Win32/Filecoder.W popup alert might falsely claim to be acquiring from a law enforcement establishment as well as will certainly report having located kid pornography or other unlawful information on the gadget. The alert will in a similar way consist of a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 3CD6E4AB
md5: 0591495d397076702580e6e088b80cce
name: 0591495D397076702580E6E088B80CCE.mlw
sha1: 7ec54f7e863697c48b09de5ea830ba24fc1952e2
sha256: 276e298e7a32a31fe5bb3101cc25bf91b67c4b117b7ea752b5cd81e1bf6d7c6e
sha512: c436e17ecf81c4306fa2c52a88e1c9a57e2178ad47c5b70ac04e45e342a6b3643a416d0731509a5eb109de51cdeed5746f790ad526c10c220fd4e04c5fe45282
ssdeep: 12288:wEPdK+0HWGWH/1XGGUEAvgoHFmTa4Fhz8gtLcOYiO:118WGWH/AY2PMX0OXO
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright:
InternalName:
FileVersion: 1.0.0.0
CompanyName:
LegalTrademarks:
LastCompiledTime: 08.11.2012 0:29:20
Comments:
ProductName:
ProductVersion: 1.0.0.0
FileDescription:
OriginalFilename:
Translation: 0x0419 0x04e3

Win32/Filecoder.W also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
MicroWorld-eScanTrojan.Generic.8397329
FireEyeGeneric.mg.0591495d39707670
Qihoo-360Win32/Trojan.Generic.HwUBar8A
ALYacTrojan.Generic.8397329
MalwarebytesMalware.Heuristic.1006
ZillyaTrojan.Crypren.Win32.2
SangforRansom.Win32.Isda.A
BitDefenderTrojan.Generic.8397329
BitDefenderThetaGen:NN.ZelphiF.34608.YG0@aiX5poli
SymantecML.Attribute.HighConfidence
ESET-NOD32a variant of Win32/Filecoder.W
APEXMalicious
AvastWin32:Trojan-gen
CynetMalicious (score: 90)
KasperskyHEUR:Trojan.Win32.Generic
AlibabaRansom:Win32/Filecoder.cdf2702b
NANO-AntivirusTrojan.Win32.Crypren.ddwguw
AegisLabTrojan.Win32.Crypren.j!c
RisingRansom.Isda!8.9B8 (CLOUD)
Ad-AwareTrojan.Generic.8397329
EmsisoftTrojan.Generic.8397329 (B)
ComodoMalware@#40nd2qn8nob3
F-SecureHeuristic.HEUR/AGEN.1105552
DrWebTrojan.Encoder.102
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionGenericR-AAI!0591495D3970
SophosMal/Generic-S
GDataTrojan.Generic.8397329
AviraHEUR/AGEN.1105552
MAXmalware (ai score=83)
Antiy-AVLTrojan[Ransom]/Win32.Crypren
KingsoftWin32.Troj.Undef.(kcloud)
ArcabitTrojan.Generic.D802211
AhnLab-V3Trojan/Win32.Filecoder.R119443
ZoneAlarmHEUR:Trojan.Win32.Generic
MicrosoftRansom:Win32/Isda.A
McAfeeGenericR-AAI!0591495D3970
VBA32BScope.TrojanRansom.CryFile
PandaTrj/CI.A
TencentWin32.Trojan.Crypren.ccv
YandexTrojan.Crypren!2SrG0BFsRnc
IkarusTrojan.Win32.Encoder
eGambitUnsafe.AI_Score_99%
FortinetW32/Ransom.ACU!tr
AVGWin32:Trojan-gen
Paloaltogeneric.ml

How to remove Win32/Filecoder.W virus?

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 Win32/Filecoder.W 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 Win32/Filecoder.W 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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