Trojan:Win32/Foosace.C!rfn

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

What is Trojan:Win32/Foosace.C!rfn infection?

In this article you will locate concerning the interpretation of Trojan:Win32/Foosace.C!rfn and its negative impact on your computer system. Such ransomware are a kind of malware that is elaborated by on-line frauds to require paying the ransom money by a sufferer.

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In the majority of the cases, Trojan:Win32/Foosace.C!rfn infection will certainly instruct its victims to initiate funds move for the function of counteracting the amendments that the Trojan infection has actually introduced to the victim’s gadget.

Trojan:Win32/Foosace.C!rfn 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.
  • 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.

  • Mimics the file times of a Windows system file;
  • 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.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the victim’s hard drive — so the sufferer can no longer utilize the data;
  • Preventing routine access 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.

Trojan:Win32/Foosace.C!rfn

The most typical networks where Trojan:Win32/Foosace.C!rfn Ransomware are infused are:

  • By means of phishing emails;
  • As a consequence of user ending up on a source that organizes a harmful software program;

As quickly as the Trojan is efficiently infused, it will certainly either cipher the information on the victim’s PC or protect against the gadget from working in a correct way – while likewise placing a ransom note that discusses the need for the sufferers to impact the repayment for the purpose of decrypting the files or bring back the documents system back to the first condition. In the majority of instances, the ransom money note will come up when the client restarts the PC after the system has already been damaged.

Trojan:Win32/Foosace.C!rfn circulation channels.

In various edges of the world, Trojan:Win32/Foosace.C!rfn expands by leaps as well as bounds. However, the ransom notes and also methods of obtaining the ransom quantity might vary relying on particular regional (regional) settings. The ransom notes and also tricks of extorting the ransom money amount might vary depending on specific local (regional) setups.

Ransomware injection

For instance:

    Faulty alerts regarding unlicensed software program.

    In particular locations, the Trojans usually wrongfully report having discovered some unlicensed applications enabled on the victim’s device. The alert after that demands the customer to pay the ransom money.

    Faulty statements about prohibited content.

    In nations where software piracy is much less prominent, this approach is not as reliable for the cyber fraudulences. Additionally, the Trojan:Win32/Foosace.C!rfn popup alert might falsely claim to be originating from a law enforcement establishment and will certainly report having located kid porn or other prohibited information on the gadget.

    Trojan:Win32/Foosace.C!rfn popup alert might incorrectly declare to be obtaining from a regulation enforcement establishment and will report having located child porn or other prohibited data on the gadget. The alert will in a similar way contain a need for the user to pay the ransom.

Technical details

File Info:

crc32: B42305A3
md5: bcf7b88f26047932a32ead602f3e7c10
name: BCF7B88F26047932A32EAD602F3E7C10.mlw
sha1: dbfcd5f0080ef42f7c0de65a627507f57b812759
sha256: 9145df9f436ff91fb3deef84d602ce12c4c9a6903df704c5920b5b5e44090dc2
sha512: f67704136fc28fde5ba55d443c44946c3862f945d0c5485dac1404138272c0c354a5886a1aedfd2a3f07353e604cd820338f12500c1314583f1cec6922ceff58
ssdeep: 768:aTYmwuTmKZAu10tissxgnfD+tdn6HS+nADkhzGinNhPGs1RVgUStu3Gy7l4:aTYmwuTLAxsmoDIADkhJTG+RVGu3NZ
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Foosace.C!rfn also known as:

GridinSoftTrojan.Ransom.Gen
K7AntiVirusTrojan ( 0048e8611 )
Elasticmalicious (high confidence)
DrWebTrojan.PWS.Wsgame.38320
CynetMalicious (score: 100)
CAT-QuickHealTrojan.Mauvaise.SL1
ALYacGen:Variant.Graftor.519027
CylanceUnsafe
ZillyaTrojan.OnLineGames.Win32.152590
SangforSuspicious.Win32.Symmi.8470
CrowdStrikewin/malicious_confidence_100% (W)
AlibabaRansom:Win32/Blocker.0c0d3134
K7GWTrojan ( 0048e8611 )
Cybereasonmalicious.f26047
CyrenW32/Trojan.IBQV-1671
SymantecInfostealer.Sofacy
ESET-NOD32a variant of Win32/Sednit.C
APEXMalicious
AvastWin32:Malware-gen
KasperskyTrojan-Ransom.Win32.Blocker.lejc
BitDefenderGen:Variant.Graftor.519027
NANO-AntivirusTrojan.Win32.Wsgame.fgvqsi
MicroWorld-eScanGen:Variant.Graftor.519027
TencentMalware.Win32.Gencirc.114d381a
Ad-AwareGen:Variant.Graftor.519027
SophosMal/Generic-R + Troj/Sednit-U
ComodoMalware@#3dhj7t8o4ei38
BitDefenderThetaGen:NN.ZexaF.34678.dmZ@ayeWjSf
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionBehavesLike.Win32.Almanahe.qc
FireEyeGeneric.mg.bcf7b88f26047932
EmsisoftGen:Variant.Graftor.519027 (B)
JiangminTrojan/Blocker.bkk
AviraTR/Dropper.Gen
eGambitTrojan.Generic
MicrosoftTrojan:Win32/Foosace.C!rfn
ArcabitTrojan.Graftor.D7EB73
AegisLabTrojan.Win32.Blocker.j!c
ZoneAlarmTrojan-Ransom.Win32.Blocker.lejc
GDataGen:Variant.Graftor.519027
AhnLab-V3Trojan/Win32.PcClient.R237841
McAfeePWS-FAGN!BCF7B88F2604
MAXmalware (ai score=99)
VBA32TrojanRansom.Blocker
MalwarebytesTrojan.ServStart
PandaTrj/CI.A
RisingDropper.Generic!8.35E (CLOUD)
IkarusTrojan.Win32.FakeSysdef
FortinetW32/Blocker.LEJC!tr
AVGWin32:Malware-gen
Paloaltogeneric.ml
Qihoo-360Win32/Ransom.Blocker.HgAASSEA

How to remove Trojan:Win32/Foosace.C!rfn 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

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 Trojan:Win32/Foosace.C!rfn 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 Trojan:Win32/Foosace.C!rfn 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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