Ransom:MSIL/Gorf

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

What is Ransom:MSIL/Gorf infection?

In this post you will certainly locate about the interpretation of Ransom:MSIL/Gorf as well as its unfavorable impact on your computer system. Such ransomware are a kind of malware that is elaborated by on-line scams to demand paying the ransom by a target.

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Most of the cases, Ransom:MSIL/Gorf ransomware will certainly advise its targets to start funds move for the function of counteracting the changes that the Trojan infection has actually introduced to the target’s tool.

Ransom:MSIL/Gorf 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.
  • Unconventionial binary language: Portuguese (Brazil);
  • Unconventionial language used in binary resources: Portuguese (Brazilian);
  • 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 copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the target’s hard disk drive — so the target can no more utilize the information. This is the typical behavior of malware known as ransomware that encrypts a victim’s files. The cybercriminal then demands a ransom from the victim to restore access to the data upon payment.
  • Preventing regular 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.

Ransom:MSIL/Gorf

The most common channels through which Ransom:MSIL/Gorf Trojans are injected are:

  • By means of phishing e-mails;
  • As a consequence of customer winding up on a source that organizes a destructive software program;

As soon as the Trojan is effectively infused, it will either cipher the data on the target’s PC or avoid the tool from functioning in a proper way – while also positioning a ransom note that states the demand for the victims to impact the repayment for the function of decrypting the documents or recovering the data system back to the preliminary problem. In the majority of circumstances, the ransom note will certainly come up when the client restarts the PC after the system has already been damaged.

Ransom:MSIL/Gorf circulation networks.

In different edges of the globe, Ransom:MSIL/Gorf grows by leaps as well as bounds. Nevertheless, the ransom notes and also techniques of extorting the ransom quantity may differ depending upon specific local (regional) setups. The ransom notes as well as techniques of obtaining the ransom money quantity may vary depending on specific neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty informs about unlicensed software.

    In certain locations, the Trojans usually wrongfully report having actually found some unlicensed applications made it possible for on the sufferer’s gadget. The alert then demands the individual to pay the ransom money.

    Faulty statements regarding illegal content.

    In countries where software application piracy is less preferred, this method is not as effective for the cyber frauds. Conversely, the Ransom:MSIL/Gorf popup alert may incorrectly declare to be stemming from a police institution as well as will certainly report having located child pornography or other prohibited information on the device.

    Ransom:MSIL/Gorf popup alert may incorrectly assert to be obtaining from a regulation enforcement institution and also will certainly report having located child pornography or various other illegal information on the gadget. The alert will in a similar way consist of a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 28F590C0
md5: a064611ef4ad43f14a17b9fdc1876774
name: A064611EF4AD43F14A17B9FDC1876774.mlw
sha1: 7547b0870cb65d5c198425f50aba1b928491ca04
sha256: 8a9c53ae1c13a7efce9a0ec7bef3b6b5d7a9b8150266560b4420dcacdca83d70
sha512: c3e2ce56f6e7f2d020be03edad21bc30c1ec6e8d3984a3636c6b0ed0fe627cc178a29ab986d7f109801542c0c073af7f317c9deddc196f5f38709a588c9372bd
ssdeep: 24576:Hs8KxTvveCu+vlUdVOGULqJ73n5ok79rmTl0r8LHD:CTvZua6d4GULC5okEaILj
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: xa9 Microsoft Corporation. Todos os direitos reservados.
InternalName: SVCHOST
FileVersion: 1.0.1.1
CompanyName: Microsoft Corporation
LegalTrademarks:
Comments:
ProductName: Sistema operacional Microsoftxae Windowsxae
ProductVersion: 1.0.0.0
FileDescription:
OriginalFilename: SVCHOST.EXE
Translation: 0x0416 0x04e4

Ransom:MSIL/Gorf also known as:

GridinSoftTrojan.Ransom.Gen
K7AntiVirusTrojan ( 005376ae1 )
Elasticmalicious (high confidence)
DrWebTrojan.PWS.Banker.based
CynetMalicious (score: 100)
CMCGeneric.Win32.a064611ef4!MD
ALYacGeneric.Banker.Delf.F97138B0
CylanceUnsafe
ZillyaTrojan.Banker.Win32.27281
SangforTrojan.Win32.Save.a
AlibabaTrojanSpy:Win32/Delfsnif.42891670
K7GWTrojan ( 005376ae1 )
Cybereasonmalicious.ef4ad4
CyrenW32/Banker.D.gen!Eldorado
SymantecInfostealer.Banpaes
ESET-NOD32a variant of Win32/Spy.Banpaes.O
APEXMalicious
TotalDefenseWin32/Bancos.G!generic
AvastWin32:Dh-A [Heur]
ClamAVWin.Trojan.Bancos-830
KasperskyHEUR:Trojan.Win32.Generic
BitDefenderGeneric.Banker.Delf.F97138B0
NANO-AntivirusTrojan.Win32.Banker.wcrw
MicroWorld-eScanGeneric.Banker.Delf.F97138B0
TencentWin32.Trojan.Spy.Ljtk
Ad-AwareGeneric.Banker.Delf.F97138B0
SophosMal/Generic-R + Troj/Bnkmr-Fam
ComodoTrojWare.Win32.Spy.Banker.Gen@1qlojk
BitDefenderThetaAI:Packer.44C85EE51C
VIPRETrojan-Spy.Win32.Bancos.a (v)
TrendMicroMal_Banker4
McAfee-GW-EditionBehavesLike.Win32.Fake.cc
FireEyeGeneric.mg.a064611ef4ad43f1
EmsisoftGeneric.Banker.Delf.F97138B0 (B)
WebrootW32.InfoStealer.Bancos
AviraTR/Spy.Banker.Gen
eGambitUnsafe.AI_Score_88%
MicrosoftRansom:MSIL/Gorf
ArcabitGeneric.Banker.Delf.F97138B0
AegisLabTrojan.Win32.Generic.4!c
GDataGeneric.Banker.Delf.F97138B0
AhnLab-V3Trojan/Win32.Banker.R6001
McAfeeArtemis!A064611EF4AD
MAXmalware (ai score=100)
VBA32TScope.Trojan.Delf
MalwarebytesMalware.Heuristic.1003
PandaTrj/Banker.ITS
TrendMicro-HouseCallMal_Banker4
RisingRansom.Gorf!8.F26C (CLOUD)
YandexTrojan.GenAsa!WZTrcN9x3Zk
IkarusBackdoor.Win32.Zegost
MaxSecureTrojan.Malware.7164915.susgen
FortinetMalware_fam.gw
AVGWin32:Dh-A [Heur]
Paloaltogeneric.ml
Qihoo-360Win32/TrojanPSW.Generic.HwsBtPEA

How to remove Ransom:MSIL/Gorf 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 Ransom:MSIL/Gorf 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

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If the guide doesn’t help you to remove Ransom:MSIL/Gorf 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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