What is Backdoor:Win32/Tofsee.F infection?

In this post you will certainly find regarding the meaning of Backdoor:Win32/Tofsee.F as well as its negative influence on your computer. Such ransomware are a kind of malware that is elaborated by online frauds to demand paying the ransom by a victim.

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Most of the situations, Backdoor:Win32/Tofsee.F ransomware will certainly advise its victims to start funds transfer for the purpose of reducing the effects of the modifications that the Trojan infection has actually introduced to the sufferer’s device.

Backdoor:Win32/Tofsee.F Summary

These alterations 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records found on the victim’s hard disk — so the victim can no longer make use of the information;
  • Preventing routine 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.


The most normal channels where Backdoor:Win32/Tofsee.F Ransomware Trojans are injected are:

  • By means of phishing emails;
  • As an effect of user ending up on a source that hosts a destructive software;

As soon as the Trojan is successfully infused, it will certainly either cipher the data on the target’s PC or prevent the tool from working in a proper way – while also putting a ransom note that discusses the demand for the targets to impact the settlement for the purpose of decrypting the documents or restoring the data system back to the preliminary condition. In the majority of instances, the ransom money note will certainly come up when the customer reboots the COMPUTER after the system has actually already been damaged.

Backdoor:Win32/Tofsee.F distribution channels.

In various edges of the world, Backdoor:Win32/Tofsee.F expands by jumps and bounds. Nevertheless, the ransom money notes and methods of extorting the ransom quantity might differ depending on specific local (local) settings. The ransom money notes as well as techniques of obtaining the ransom money amount might differ depending on particular neighborhood (regional) settings.

Ransomware injection

For instance:

    Faulty signals about unlicensed software.

    In certain areas, the Trojans usually wrongfully report having discovered some unlicensed applications allowed on the sufferer’s tool. The sharp after that demands the individual to pay the ransom money.

    Faulty declarations about illegal web content.

    In nations where software program piracy is less prominent, this approach is not as reliable for the cyber fraudulences. Additionally, the Backdoor:Win32/Tofsee.F popup alert may falsely claim to be stemming from a law enforcement establishment and also will report having located child pornography or other prohibited data on the gadget.

    Backdoor:Win32/Tofsee.F popup alert might falsely assert to be acquiring from a law enforcement establishment and also will report having located child porn or other unlawful data on the tool. The alert will likewise have a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 4E8AD79C
md5: 88c2f358ca98c49582cd324990254bcd
name: 88C2F358CA98C49582CD324990254BCD.mlw
sha1: 9eef2549984300fad3d8635c76ad87a069f6f0aa
sha256: afe98d39883e9950ab6abc0d097ed2a66e4a598e85a8925e34919a8789c65aa8
sha512: 7b5def9b2c8aa6f2a3ed947aa8d95fbead70ba7a3cd18f16b01b09185bade5a14dc65dbdabfd90a6e7793baf16393118794059c6cda23811bf9a11dbfbc7df8b
ssdeep: 3072:rrSYf0JgD6dg+q+JT/XDr6zBrUfg/CfEgl3KJcxJ3CfK9LPEo2Oj14Wf+OkqlF:Ff0JgejbXPoBQfFM6SKg/qlF
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Backdoor:Win32/Tofsee.F also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
ALYac Gen:Trojan.Heur.JP.nqW@aWgibvl
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 0052c8a31 )
K7AntiVirus Trojan ( 0052c8a31 )
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:Evo-gen [Susp]
BitDefender Gen:Trojan.Heur.JP.nqW@aWgibvl
NANO-Antivirus Virus.Win32.Gen-Crypt.ccnc
MicroWorld-eScan Gen:Trojan.Heur.JP.nqW@aWgibvl
Tencent Win32.Trojan.Generic.Eddy
Ad-Aware Gen:Trojan.Heur.JP.nqW@aWgibvl
Sophos Mal/Generic-R + Mal/ResDro-B
BitDefenderTheta AI:Packer.5AABA3E41E
VIPRE Trojan-Dropper.Win32.Resdro.b (v) (not malicious)
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
Emsisoft Gen:Trojan.Heur.JP.nqW@aWgibvl (B)
SentinelOne Static AI – Malicious PE
Avira TR/Crypt.ZPACK.Gen
eGambit Unsafe.AI_Score_97%
Microsoft Backdoor:Win32/Tofsee.F
Arcabit Trojan.Heur.JP.E15B41
GData Gen:Trojan.Heur.JP.nqW@aWgibvl
Acronis suspicious
McAfee BackDoor-EXZ
MAX malware (ai score=82)
VBA32 Malware-Cryptor.General.2
Panda Trj/CI.A
Rising Backdoor.Tofsee!8.1E9 (CLOUD)
Fortinet W32/Filecoder.FV!tr.ransom
AVG Win32:Evo-gen [Susp]
Qihoo-360 Win32/Trojan.Generic.HxMBEpsA

How to remove Backdoor:Win32/Tofsee.F 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 Backdoor:Win32/Tofsee.F 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 Backdoor:Win32/Tofsee.F you can always ask me in the comments for getting help.

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About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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