Trojan:Win32/Tofsee.PVF!MTB

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

What is Trojan:Win32/Tofsee.PVF!MTB infection?

In this article you will certainly discover regarding the interpretation of Trojan:Win32/Tofsee.PVF!MTB and its unfavorable effect on your computer system. Such ransomware are a form of malware that is specified by online scams to demand paying the ransom money by a target.

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In the majority of the situations, Trojan:Win32/Tofsee.PVF!MTB virus will certainly advise its sufferers to initiate funds transfer for the function of reducing the effects of the changes that the Trojan infection has presented to the target’s gadget.

Trojan:Win32/Tofsee.PVF!MTB Summary

These modifications can be as follows:

  • 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.
  • 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.

  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • 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
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files found on the sufferer’s hard disk drive — so the victim can no more use the information;
  • Preventing normal accessibility 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.
Similar behavior
Related domains
z.whorecord.xyz Trojan.Ransom.GandCrab.Gen.2
a.tomx.xyz Trojan.Ransom.GandCrab.Gen.2
ipv4bot.whatismyipaddress.com Trojan.Ransom.GandCrab.Gen.2
ns1.cloud-name.ru Trojan.Ransom.GandCrab.Gen.2
zonealarm.bit Trojan.Ransom.GandCrab.Gen.2
ns2.cloud-name.ru Trojan.Ransom.GandCrab.Gen.2
ransomware.bit Trojan.Ransom.GandCrab.Gen.2

Trojan:Win32/Tofsee.PVF!MTB

One of the most regular channels through which Trojan:Win32/Tofsee.PVF!MTB Ransomware are injected are:

  • By means of phishing emails;
  • As a consequence of user winding up on a source that hosts a destructive software;

As soon as the Trojan is effectively infused, it will either cipher the information on the victim’s computer or stop the tool from operating in a proper manner – while additionally positioning a ransom note that mentions the requirement for the victims to impact the payment for the objective of decrypting the documents or bring back the data system back to the first condition. In most instances, the ransom money note will certainly turn up when the client reboots the PC after the system has actually already been damaged.

Trojan:Win32/Tofsee.PVF!MTB distribution networks.

In different edges of the world, Trojan:Win32/Tofsee.PVF!MTB grows by leaps and also bounds. However, the ransom money notes and also tricks of extorting the ransom amount might vary relying on specific neighborhood (regional) settings. The ransom money notes and techniques of obtaining the ransom money quantity may vary depending on particular local (local) settings.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In particular areas, the Trojans usually wrongfully report having actually detected some unlicensed applications enabled on the target’s device. The sharp then requires the individual to pay the ransom.

    Faulty declarations concerning prohibited material.

    In nations where software program piracy is less prominent, this approach is not as reliable for the cyber fraudulences. Additionally, the Trojan:Win32/Tofsee.PVF!MTB popup alert may incorrectly assert to be stemming from a law enforcement establishment as well as will report having situated kid pornography or various other unlawful data on the device.

    Trojan:Win32/Tofsee.PVF!MTB popup alert may falsely claim to be obtaining from a law enforcement establishment as well as will report having located youngster pornography or other illegal data on the gadget. The alert will in a similar way have a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 265A6315
md5: 2c1ff172f68400d0b33e8cb2e4f7d771
name: 2C1FF172F68400D0B33E8CB2E4F7D771.mlw
sha1: 92f4ac749f337565fbff848e5117dc79e030b3b5
sha256: 4e875b17f92a5896d96cc93d049ec83ac3dfcfd3b2b8d8c4892fcc0230c202be
sha512: e3ede522a4b411c1ecf0993aa52591c1d84c7c7495b3cd228e540af01ef5acdd5f1cd9172a402f73173ba2b7dc3b78c20a4123c3613e7bb4f0363831fb76dea4
ssdeep: 6144:GAqQGtvenJrvfxaKP1HLhRq2MLj15jBvp9HxawFH4yeaExOkI5h:G5mnJxD0nuI5h
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Tofsee.PVF!MTB also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
ClamAV Win.Packed.Gandcrab-6520432-4
FireEye Generic.mg.2c1ff172f68400d0
CAT-QuickHeal Trojan.Cloxer.A06
McAfee GenericRXEP-KI!2C1FF172F684
Cylance Unsafe
Sangfor Win.Packed.Gandcrab-6520432-4
CrowdStrike win/malicious_confidence_100% (D)
BitDefender Trojan.Ransom.GandCrab.Gen.2
K7GW Riskware ( 0040eff71 )
K7AntiVirus Riskware ( 0040eff71 )
Cyren W32/S-d4664328!Eldorado
Symantec Packed.Generic.525
APEX Malicious
Paloalto generic.ml
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan.Win32.Zenpak.gen
NANO-Antivirus Trojan.Win32.Proxy2.ezpdwi
ViRobot Trojan.Win32.GandCrab.Gen.A
MicroWorld-eScan Trojan.Ransom.GandCrab.Gen.2
Rising Ransom.GandCrab!8.F355 (CLOUD)
Ad-Aware Trojan.Ransom.GandCrab.Gen.2
Emsisoft Trojan.Ransom.GandCrab.Gen.2 (B)
Comodo TrojWare.Win32.Magniber.DO@7nsbjp
F-Secure Heuristic.HEUR/AGEN.1102756
DrWeb Trojan.Proxy2.533
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_GANDCRAB.SMALY-3
McAfee-GW-Edition BehavesLike.Win32.Generic.fc
Sophos Mal/Generic-R + Mal/Agent-AUL
SentinelOne Static AI – Malicious PE
Jiangmin Downloader.Generic.myh
Avira HEUR/AGEN.1102756
MAX malware (ai score=100)
Antiy-AVL RiskWare[Downloader]/Win32.AGeneric
Microsoft Trojan:Win32/Tofsee.PVF!MTB
Arcabit Trojan.Ransom.GandCrab.Gen.2
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
ZoneAlarm HEUR:Trojan.Win32.Zenpak.gen
GData Trojan.Ransom.GandCrab.Gen.2
AhnLab-V3 Win-Trojan/Gandcrab.Exp
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34590.uuX@aqgF!oj
ALYac Trojan.Ransom.GandCrab.Gen.2
VBA32 BScope.Trojan.Chapak
Malwarebytes Trojan.MalPack
ESET-NOD32 a variant of Win32/Kryptik.GFGV
TrendMicro-HouseCall Ransom_GANDCRAB.SMALY-3
Tencent Malware.Win32.Gencirc.10b80026
Yandex Trojan.GenAsa!pPXXb09kjUs
Ikarus Trojan.Win32.Tofsee
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Kryptik.GVHF!tr
Cybereason malicious.2f6840
Panda Trj/Genetic.gen
Qihoo-360 Win32/Virus.Downloader.c27

How to remove Trojan:Win32/Tofsee.PVF!MTB virus?

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 Trojan:Win32/Tofsee.PVF!MTB 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/Tofsee.PVF!MTB 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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