Win32/Filecoder.OFS

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

What is Win32/Filecoder.OFS infection?

In this short article you will find about the meaning of Win32/Filecoder.OFS and its adverse influence on your computer system. Such ransomware are a form of malware that is clarified by online scams to demand paying the ransom by a victim.

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In the majority of the instances, Win32/Filecoder.OFS ransomware will instruct its targets to initiate funds move for the function of neutralizing the modifications that the Trojan infection has introduced to the sufferer’s gadget.

Win32/Filecoder.OFS Summary

These alterations can be as adheres to:

  • 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.
  • Unconventionial language used in binary resources: Russian;
  • Detects Sandboxie through the presence of a library;
  • 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.
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Ciphering the papers situated on the target’s hard drive — so the victim can no more use the information;
  • Preventing regular 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.

Win32/Filecoder.OFS

The most normal channels where Win32/Filecoder.OFS are injected 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 winding up on a resource that organizes a malicious software application;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the sufferer’s computer or protect against the tool from functioning in a proper fashion – while likewise placing a ransom money note that mentions the need for the victims to effect the payment for the objective of decrypting the documents or bring back the documents system back to the preliminary condition. In the majority of instances, the ransom money note will certainly turn up when the client restarts the PC after the system has actually already been damaged.

Win32/Filecoder.OFS circulation networks.

In various edges of the world, Win32/Filecoder.OFS grows by leaps as well as bounds. However, the ransom notes as well as techniques of obtaining the ransom quantity might differ depending upon certain regional (regional) setups. The ransom notes as well as tricks of extorting the ransom money amount may differ depending on specific neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software.

    In specific locations, the Trojans typically wrongfully report having actually discovered some unlicensed applications enabled on the sufferer’s tool. The sharp then requires the user to pay the ransom.

    Faulty declarations concerning unlawful web content.

    In countries where software application piracy is much less prominent, this technique is not as reliable for the cyber fraudulences. Conversely, the Win32/Filecoder.OFS popup alert might falsely assert to be stemming from a police institution as well as will report having located kid porn or various other prohibited information on the tool.

    Win32/Filecoder.OFS popup alert might incorrectly assert to be deriving from a law enforcement establishment and will report having located child porn or various other unlawful data on the device. The alert will in a similar way consist of a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: F267298A
md5: 734ebe963716a9ba20ffb75dceff80ea
name: 734EBE963716A9BA20FFB75DCEFF80EA.mlw
sha1: 8f98635aa27f50340ebd380ec4743855734f2a35
sha256: 55388fde35f487317a3e763f706fe03e39a87d1ba35f40ac9ec85e589d175ebf
sha512: 19fc995018a40a5a323cd962d991a83c58b170b1c6492b36cba85578d491465669666a002179aa2d461ab45bfbb568f6916ab04ea1dcd23778db3a0adb498d0a
ssdeep: 49152:yJ/gC1r/bbLa3LHQ60uOy3cbOrIuKKdu0:gIC1rHuJOrnLKd9
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Filecoder.OFS also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
MicroWorld-eScanTrojan.GenericKD.45770090
CAT-QuickHealProgram.Wacapew
Qihoo-360Win32/Heur.Generic.HwYDSicA
ALYacTrojan.GenericKD.45770090
CylanceUnsafe
VIPRETrojan.Win32.Generic!BT
K7AntiVirusTrojan ( 00577fcc1 )
BitDefenderTrojan.GenericKD.45770090
K7GWTrojan ( 00577fcc1 )
Cybereasonmalicious.aa27f5
CyrenW32/Trojan.RRCE-3102
SymantecTrojan.Gen.MBT
APEXMalicious
AvastWin32:Trojan-gen
KasperskyTrojan-Ransom.Win32.Encoder.lme
NANO-AntivirusTrojan.Win32.Encoder.imanae
TencentWin32.Trojan.Encoder.Afhu
Ad-AwareTrojan.GenericKD.45770090
EmsisoftTrojan.GenericKD.45770090 (B)
F-SecureTrojan.TR/FileCoder.cmlwr
TrendMicroRansom_Encoder.R002C0PBI21
McAfee-GW-EditionBehavesLike.Win32.Generic.tc
FireEyeGeneric.mg.734ebe963716a9ba
SophosMal/Generic-S
IkarusTrojan-Ransom.FileCrypter
AviraTR/FileCoder.kwezc
MicrosoftTrojan:Win32/Wacatac.D5!ml
ArcabitTrojan.Generic.D2BA656A
ZoneAlarmTrojan-Ransom.Win32.Encoder.lme
GDataTrojan.GenericKD.45770090
CynetMalicious (score: 100)
AhnLab-V3Malware/Win32.Generic.C4338949
McAfeeArtemis!734EBE963716
MAXmalware (ai score=81)
MalwarebytesMalware.Heuristic.1003
PandaTrj/CI.A
ESET-NOD32Win32/Filecoder.OFS
TrendMicro-HouseCallRansom_Encoder.R002C0PBI21
RisingTrojan.Filecoder!8.68 (CLOUD)
FortinetMalicious_Behavior.SB
BitDefenderThetaGen:NN.ZelphiF.34590.PmuaaaLyDAdi
AVGWin32:Trojan-gen
Paloaltogeneric.ml
CrowdStrikewin/malicious_confidence_80% (W)
MaxSecureTrojan.Malware.114454010.susgen

How to remove Win32/Filecoder.OFS 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 Win32/Filecoder.OFS 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.OFS 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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