Ransom:Win32/Tobfy.N

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

What is Ransom:Win32/Tobfy.N infection?

In this short article you will locate about the meaning of Ransom:Win32/Tobfy.N and its adverse influence on your computer system. Such ransomware are a kind of malware that is specified by on the internet scams to demand paying the ransom by a victim.

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In the majority of the cases, Ransom:Win32/Tobfy.N infection will advise its targets to launch funds move for the function of neutralizing the amendments that the Trojan infection has presented to the target’s tool.

Ransom:Win32/Tobfy.N Summary

These modifications can be as complies with:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.
  • A process attempted to delay the analysis task.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • A process was set to shut the system down when terminated;
  • Behavior consistent with a dropper attempting to download the next stage.;
  • 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.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents located on the target’s hard disk drive — so the target can no longer use the data;
  • Preventing normal accessibility to the victim’s workstation;

Ransom:Win32/Tobfy.N

One of the most normal channels where Ransom:Win32/Tobfy.N Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As a consequence of individual ending up on a resource that holds a harmful software application;

As soon as the Trojan is efficiently injected, it will certainly either cipher the data on the target’s computer or protect against the tool from operating in a proper fashion – while likewise placing a ransom note that points out the need for the sufferers to impact the settlement for the function of decrypting the files or restoring the documents system back to the first problem. In the majority of instances, the ransom note will show up when the client reboots the PC after the system has currently been harmed.

Ransom:Win32/Tobfy.N distribution channels.

In different corners of the world, Ransom:Win32/Tobfy.N expands by leaps as well as bounds. Nevertheless, the ransom money notes and tricks of obtaining the ransom quantity might differ relying on certain local (regional) settings. The ransom money notes as well as methods of obtaining the ransom money amount may vary depending on particular neighborhood (regional) settings.

Ransomware injection

For example:

    Faulty alerts concerning unlicensed software program.

    In specific areas, the Trojans usually wrongfully report having actually spotted some unlicensed applications made it possible for on the target’s device. The alert after that requires the individual to pay the ransom money.

    Faulty declarations regarding illegal material.

    In nations where software application piracy is less preferred, this approach is not as reliable for the cyber frauds. Additionally, the Ransom:Win32/Tobfy.N popup alert may incorrectly declare to be originating from a police institution and also will report having located kid porn or other prohibited data on the device.

    Ransom:Win32/Tobfy.N popup alert might wrongly assert to be deriving from a regulation enforcement institution and also will report having situated child pornography or various other illegal data on the tool. The alert will in a similar way consist of a need for the customer to pay the ransom.

Technical details

File Info:

crc32: BC562CCC
md5: b6501d6082e19468b099c85b218dd687
name: B6501D6082E19468B099C85B218DD687.mlw
sha1: 7383328add7da050712cf2c3238657037a1c5659
sha256: 895be99c51fc2b5f27a93061f371ca121deefdb34711d0e829ce2484e50c1de2
sha512: b372468dd8bdbee37d8136e5df31e1370ff15982b2af206c547474f7543b169909d974ea8ef6c2740c71b437258caae64f8de1c7188b59b20685a89ca23c87fc
ssdeep: 1536:LJq3X6qIWffZvSBc8y/HtPkoMwJ1NZZEY:LJq3X6q5pKGPtPtfZZEY
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: migrate.exe
FileVersion: 9.00.00.4503 (xpsp.080413-0845)
CompanyName: Microsoft Corporation
ProductName: Microsoftxae Windows Media Services
ProductVersion: 9.00.00.4503
FileDescription: MLS Migrate DLL
OriginalFilename: migrate.exe
Translation: 0x0409 0x04b0

Ransom:Win32/Tobfy.N also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0055e4091 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop4.24552
Cynet Malicious (score: 100)
McAfee Ransom-FAXS!B6501D6082E1
Cylance Unsafe
Zillya Trojan.Blocker.Win32.4794
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Tobfy.28092fd2
K7GW Trojan ( 0055e4091 )
Cybereason malicious.082e19
Symantec Packed.Generic.459
ESET-NOD32 Win32/LockScreen.APQ
APEX Malicious
Avast Win32:Karagany
ClamAV Win.Virus.Blocker-992
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.FakeAlert.DEJ
NANO-Antivirus Trojan.Win32.Drop.crrguz
MicroWorld-eScan Trojan.FakeAlert.DEJ
Tencent Win32.Trojan.Lockscreen.Pepc
Ad-Aware Trojan.FakeAlert.DEJ
Sophos ML/PE-A + Mal/EncPk-AIR
Comodo TrojWare.Win32.Kryptik.BVPL@57uzhp
VIPRE Trojan.Win32.Reveton.a (v)
TrendMicro Mal_Ransom-1
McAfee-GW-Edition Ransom-FAXS!B6501D6082E1
FireEye Generic.mg.b6501d6082e19468
Emsisoft Trojan.FakeAlert.DEJ (B)
Webroot W32.Rogue.Gen
Avira HEUR/AGEN.1122090
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Tobfy.N
Arcabit Trojan.FakeAlert.DEJ
AegisLab Trojan.Win32.Androm.lW9Q
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.FakeAlert.DEJ
AhnLab-V3 Trojan/Win32.Blocker.R54123
VBA32 TScope.Malware-Cryptor.SB
MAX malware (ai score=80)
Malwarebytes Malware.Heuristic.1008
Panda Trj/Sinowal.WWG
TrendMicro-HouseCall Mal_Ransom-1
Rising Ransom.Tobfy!8.339 (CLOUD)
Yandex Trojan.Agent!TiZkwIwj3j0
SentinelOne Static AI – Malicious PE
Fortinet W32/Kryptik.WDV!tr
AVG Win32:Karagany
Paloalto generic.ml
Qihoo-360 Win32/Trojan.FakeAv.HxQBQqsA

How to remove Ransom:Win32/Tobfy.N 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

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:Win32/Tobfy.N 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 Ransom:Win32/Tobfy.N 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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