Written by Robert Bailey

What is Backdoor:Win32/Bifrose infection?

In this article you will certainly discover regarding the meaning of Backdoor:Win32/Bifrose as well as its unfavorable effect on your computer. Such ransomware are a type of malware that is clarified by on-line fraudulences to require paying the ransom by a target.

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In the majority of the instances, Backdoor:Win32/Bifrose ransomware will advise its targets to start funds transfer for the purpose of counteracting the modifications that the Trojan infection has actually introduced to the sufferer’s device.

Backdoor:Win32/Bifrose 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.
  • 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.;
  • Expresses interest in specific running processes;
  • 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.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • 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;
  • Checks for the presence of known windows from debuggers and forensic tools;
  • 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 for the presence of known devices from debuggers and forensic tools;
  • Ciphering the documents located on the victim’s hard disk — so the victim can no more use 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.
Similar behavior
Related domains


The most regular networks where Backdoor:Win32/Bifrose Ransomware Trojans are infused are:

  • By ways of phishing emails;
  • As a repercussion of user winding up on a source that holds a harmful software program;

As soon as the Trojan is successfully infused, it will certainly either cipher the data on the target’s computer or prevent the tool from working in a correct way – while additionally placing a ransom money note that points out the requirement for the sufferers to impact the repayment for the function of decrypting the files or bring back the documents system back to the initial condition. In a lot of circumstances, the ransom note will certainly come up when the customer restarts the PC after the system has already been harmed.

Backdoor:Win32/Bifrose circulation channels.

In various edges of the globe, Backdoor:Win32/Bifrose grows by leaps and also bounds. Nonetheless, the ransom money notes and also techniques of obtaining the ransom money amount might differ relying on particular local (local) setups. The ransom money notes as well as methods of obtaining the ransom quantity might differ depending on certain regional (local) setups.

Ransomware injection

For example:

    Faulty notifies about unlicensed software application.

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

    Faulty statements regarding unlawful content.

    In countries where software program piracy is less prominent, this method is not as reliable for the cyber scams. Conversely, the Backdoor:Win32/Bifrose popup alert may wrongly assert to be stemming from a law enforcement organization as well as will report having located kid pornography or other prohibited information on the tool.

    Backdoor:Win32/Bifrose popup alert may falsely assert to be acquiring from a legislation enforcement institution and will certainly report having located youngster porn or other illegal data on the tool. The alert will similarly consist of a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: CC7567D7
md5: 78cde4c2ff864e83920adcee0a250095
name: set.exe
sha1: 135cb00cc0028d46c215485c80dd3a3cc7ff9b15
sha256: 59b867339a3f0e27c9d9ffca49985fee7fa2a4a513d5ec116cc93fd94bbcffb0
sha512: 8ab5cec7de2404eb82fdfd46e7ce23132c6d2e8dbe05a87e5cfd73f72ff34ff82e33e2eee451abf4c1308ea5d02d44c57d052a508c15b35968ba28d881a45e08
ssdeep: 24576:CV0iZ526r5FBg5rt/WP8MRxIDGq/OmANtfFxcrBEiXubKaZgYjIwNg:yBZ5J/BYp/n+mGiTA73+qwuuWXjIyg
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Backdoor:Win32/Bifrose also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware2
MicroWorld-eScan Gen:Trojan.Heur.grYa5CixUOl
Qihoo-360 Win32/Trojan.649
McAfee Artemis!78CDE4C2FF86
Cylance Unsafe
VIPRE Backdoor.Win32.Ircbot.gen (v)
K7AntiVirus Trojan ( 0040f4ef1 )
BitDefender Gen:Trojan.Heur.grYa5CixUOl
K7GW Trojan ( 0040f4ef1 )
Cybereason malicious.2ff864
Invincea heuristic
F-Prot W32/Backdoor.E.gen!Eldorado
Symantec ML.Attribute.HighConfidence
APEX Malicious
GData Gen:Trojan.Heur.grYa5CixUOl
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Backdoor:Win32/Bifrose.8deda842
NANO-Antivirus Trojan.Win32.Bifrose.bjippf
Tencent Win32.Trojan.Generic.Akft
Emsisoft Gen:Trojan.Heur.grYa5CixUOl (B)
Comodo Malware@#3sj8jnscj7yju
F-Secure Backdoor.BDS/Bifrose.Gen
DrWeb Trojan.Packed.1726
Sophos Mal/Bifrose-AS
Ikarus Backdoor.Win32.Bifrose
Cyren W32/Backdoor.E.gen!Eldorado
Avira TR/Dropper.Gen
MAX malware (ai score=81)
Antiy-AVL Trojan[Backdoor]/Win32.AGeneric
Endgame malicious (high confidence)
Arcabit Trojan.Heur.grYa5CixUOl
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
Microsoft Backdoor:Win32/Bifrose
BitDefenderTheta AI:Packer.5E62BF491B
ESET-NOD32 a variant of Generik.NGPYEFR
Rising Backdoor.Bifrose!8.B24 (CLOUD)
Yandex Backdoor.Bifrose!MfJbjdi7TF0
eGambit Unsafe.AI_Score_99%
Fortinet PossibleThreat
AVG Win32:Bifrose-EUK [Trj]
Avast Win32:Bifrose-EUK [Trj]
CrowdStrike win/malicious_confidence_80% (W)
MaxSecure Trojan.Malware.73887694.susgen

How to remove Backdoor:Win32/Bifrose 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

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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/Bifrose 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

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Backdoor:Win32/Bifrose you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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