Ransom.Filecoder

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

What is Ransom.Filecoder infection?

In this post you will certainly discover about the meaning of Ransom.Filecoder and its negative impact on your computer system. Such ransomware are a kind of malware that is specified by online frauds to demand paying the ransom by a victim.

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Most of the cases, Ransom.Filecoder infection will instruct its targets to initiate funds transfer for the objective of neutralizing the modifications that the Trojan infection has introduced to the victim’s device.

Ransom.Filecoder Summary

These alterations 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.
  • Expresses interest in specific running processes;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Unconventionial language used in binary resources: Russian;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • 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
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • 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.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Ciphering the files situated on the target’s disk drive — so the target can no more use the information;
  • Preventing routine accessibility to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Ransom.Filecoder

The most common networks where Ransom.Filecoder Trojans are infused are:

  • By means of phishing e-mails;
  • As a repercussion of individual winding up on a source that hosts a malicious software program;

As quickly as the Trojan is efficiently infused, it will either cipher the information on the victim’s PC or protect against the gadget from operating in an appropriate fashion – while also putting a ransom money note that mentions the demand for the sufferers to effect the settlement for the objective of decrypting the files or recovering the file system back to the preliminary condition. In many circumstances, the ransom money note will show up when the customer reboots the COMPUTER after the system has already been harmed.

Ransom.Filecoder distribution networks.

In various corners of the world, Ransom.Filecoder grows by jumps and also bounds. However, the ransom notes and methods of obtaining the ransom money amount may differ relying on specific neighborhood (local) setups. The ransom money notes and also methods of extorting the ransom money amount might differ depending on particular neighborhood (local) setups.

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software.

    In certain locations, the Trojans typically wrongfully report having actually detected some unlicensed applications made it possible for on the sufferer’s tool. The alert after that demands the customer to pay the ransom money.

    Faulty statements regarding prohibited content.

    In nations where software program piracy is much less preferred, this technique is not as efficient for the cyber fraudulences. Conversely, the Ransom.Filecoder popup alert may falsely claim to be deriving from a police organization and will certainly report having situated youngster pornography or various other illegal data on the device.

    Ransom.Filecoder popup alert might falsely assert to be obtaining from a regulation enforcement organization and will report having situated youngster porn or other unlawful data on the device. The alert will similarly include a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: C00C70E4
md5: 93e7fb45f144d8401683cfd4fd973fdc
name: flashplayer_32_sa.exe
sha1: 018d194f835f01a7b128b92eb3ff23b2c208db91
sha256: 9fab82efd9242c024146d1125313a2656393aea4085924c78f212de4ae0a8cd5
sha512: a21190dcc8ee38e54853906efb60e55a4ca5a2958d5cd2050e533fff1323056ddba1d7085c6bf652a83eeeee5c18fa2e7b578051691c6110cc5debcd9b633981
ssdeep: 3072:nGbHwx3GsAFyQbXO0kwXmFRqAh+7QouCv8BATTy+zL9GwqRlcBapeEdmIMyXn:nG7u6jrkwvKaXR0cyYLF6lcBapBddX
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Ransom.Filecoder also known as:

GridinSoftTrojan.Ransom.Gen
DrWebTrojan.Winlock.3333
MicroWorld-eScanTrojan.Generic.5848174
FireEyeGeneric.mg.93e7fb45f144d840
CAT-QuickHealTrojanRansom.Blocker
McAfeeGenericRXAA-AA!93E7FB45F144
CylanceUnsafe
VIPRETrojan.Win32.Birele.mby (v)
AegisLabTrojan.Win32.Blocker.4!c
SangforMalware
K7AntiVirusTrojan ( 0039911e1 )
BitDefenderTrojan.Generic.5848174
K7GWTrojan ( 0039911e1 )
Cybereasonmalicious.5f144d
Invinceaheuristic
BitDefenderThetaGen:NN.ZelphiF.34084.jmGfa4ibBHlI
F-ProtW32/Trojan2.OAEZ
SymantecTrojan.Ransomlock
TotalDefenseWin32/Ransom.AFK
APEXMalicious
Paloaltogeneric.ml
ClamAVWin.Ransomware.Fullscreen-7347612-0
GDataTrojan.Generic.5848174
KasperskyTrojan-Ransom.Win32.Blocker.jzec
AlibabaRansom:Win32/Blocker.f6f35952
NANO-AntivirusTrojan.Win32.Fullscreen.crnep
RisingTrojan.Win32.Weenloc.a (CLOUD)
Ad-AwareTrojan.Generic.5848174
SophosMal/Ransom-AI
ComodoTrojWare.Win32.Ransom.Fullscreen.fgt@4t6ar8
F-SecureDropper.DR/Delphi.Gen4
BaiduWin32.Trojan.LockScreen.b
ZillyaTrojan.Fullscreen.Win32.36
TrendMicroRansom_WINLOCK.SM
McAfee-GW-EditionBehavesLike.Win32.Fareit.cc
Trapminemalicious.high.ml.score
CMCTrojan-Ransom.Win32.Fullscreen!O
EmsisoftTrojan.Generic.5848174 (B)
IkarusTrojan-Ransom.Win32.Birele
CyrenW32/Trojan.GDVD-7096
JiangminTrojan/Fullscreen.ak
AviraDR/Delphi.Gen4
Antiy-AVLTrojan[Ransom]/Win32.PornoAsset.cioy
Endgamemalicious (moderate confidence)
ArcabitTrojan.Generic.D593C6E
SUPERAntiSpywareTrojan.Agent/Gen-Ransom
ZoneAlarmTrojan-Ransom.Win32.Blocker.jzec
MicrosoftTrojan:Win32/Occamy.C
TACHYONRansom/W32.DP-PornoAsset.407040
AhnLab-V3Trojan/Win32.Winlock.R158616
VBA32TScope.Trojan.Delf
ALYacTrojan.Generic.5848174
MAXmalware (ai score=100)
MalwarebytesRansom.Filecoder
PandaTrj/Genetic.gen
ZonerTrojan.Win32.46437
ESET-NOD32a variant of Win32/LockScreen.AGU
TrendMicro-HouseCallRansom_WINLOCK.SM
TencentTrojan-Ransom.Win32.Blocker.jzec
YandexTrojan.WinBlock.Black.Gen.AA
SentinelOneDFI – Malicious PE
eGambitUnsafe.AI_Score_99%
FortinetW32/LockScreen.AGU!tr
WebrootW32.Trojan.Gen
AVGWin32:LockScreen-AHV [Trj]
AvastWin32:LockScreen-AHV [Trj]
CrowdStrikewin/malicious_confidence_90% (W)
Qihoo-360Win32/Trojan.Ransom.eea

How to remove Ransom.Filecoder 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

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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 Ransom.Filecoder 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Ransom.Filecoder 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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