Written by Robert Bailey

What is TrojanDropper:Win32/Bifrose.F infection?

In this article you will locate regarding the interpretation of TrojanDropper:Win32/Bifrose.F and also its unfavorable effect on your computer system. Such ransomware are a form of malware that is elaborated by on-line frauds to require paying the ransom by a sufferer.

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Most of the cases, TrojanDropper:Win32/Bifrose.F ransomware will certainly advise its targets to initiate funds move for the purpose of counteracting the modifications that the Trojan infection has actually presented to the victim’s tool.

TrojanDropper:Win32/Bifrose.F Summary

These modifications can be as adheres to:

  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Executed a process and injected code into it, probably while unpacking;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the victim’s hard disk drive — so the target can no longer 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.


The most common channels where TrojanDropper:Win32/Bifrose.F Ransomware are infused are:

  • By ways of phishing e-mails;
  • As a consequence of user winding up on a resource that hosts a harmful software program;

As soon as the Trojan is successfully infused, it will either cipher the data on the victim’s PC or stop the gadget from working in an appropriate fashion – while likewise placing a ransom note that discusses the need for the sufferers to effect the settlement for the function of decrypting the documents or recovering the file system back to the initial condition. In the majority of instances, the ransom money note will turn up when the customer reboots the PC after the system has actually currently been harmed.

TrojanDropper:Win32/Bifrose.F circulation channels.

In numerous edges of the globe, TrojanDropper:Win32/Bifrose.F expands by jumps as well as bounds. Nevertheless, the ransom money notes as well as tricks of obtaining the ransom money amount might differ depending upon specific local (local) settings. The ransom money notes and tricks of obtaining the ransom money quantity might vary depending on specific local (local) setups.

Ransomware injection

For example:

    Faulty signals concerning unlicensed software application.

    In certain areas, the Trojans commonly wrongfully report having discovered some unlicensed applications made it possible for on the target’s gadget. The sharp after that requires the user to pay the ransom money.

    Faulty declarations regarding unlawful content.

    In countries where software program piracy is less preferred, this technique is not as effective for the cyber frauds. Conversely, the TrojanDropper:Win32/Bifrose.F popup alert might falsely claim to be deriving from a police establishment and will report having situated youngster pornography or other unlawful information on the device.

    TrojanDropper:Win32/Bifrose.F popup alert may incorrectly declare to be obtaining from a law enforcement establishment as well as will report having located kid porn or other prohibited information on the device. The alert will in a similar way contain a need for the individual to pay the ransom.

Technical details

File Info:

crc32: 790896B6
md5: 188680b349de15c03ed266a69b122aca
name: 188680B349DE15C03ED266A69B122ACA.mlw
sha1: aa299dc54ea2c674be84a4c1ce679626dbfa95e5
sha256: 1ebb9080e26cf3698eb6c0e4506136df0e9034544e38d9a4ad9c98400216b0aa
sha512: 17975b00cc566b6bc531f6744316e9498b504a96c0777000693184082148c65f44812ac2ccac68cec588b717bb223cb599ba6dd5281fd224a0974b23be63d138
ssdeep: 3072:UG8ZGG5nhUYOpYlNq9O96HM0XUGXU2Fo21364EoiJeeI+StSqYLj8MfseRzqPv4S:1TiScnVW5GJZ2tNYLj8MfsEvorT
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0409 0x04b0
LegalCopyright: dTisb
InternalName: 555
FileVersion: 2.05.0087
CompanyName: KZGYJNn
LegalTrademarks: EbzF
Comments: ZSl
ProductName: MQfACLUP
ProductVersion: 2.05.0087
FileDescription: NAb
OriginalFilename: 555.exe

TrojanDropper:Win32/Bifrose.F also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Riskware ( 0015e4f11 )
Elastic malicious (high confidence)
DrWeb Trojan.Botnetlog.1121
Cynet Malicious (score: 100)
ALYac Gen:Heur.ManBat.1
Cylance Unsafe
Zillya Backdoor.Bredolab.Win32.6779
CrowdStrike win/malicious_confidence_90% (D)
Alibaba TrojanDropper:Win32/Bifrose.e3ccafec
K7GW Riskware ( 0015e4f11 )
Cybereason malicious.349de1
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Bifrose.NIO
APEX Malicious
Avast Win32:Bifrose-ESM [Trj]
ClamAV Win.Trojan.Manbat-6915473-0
Kaspersky Trojan.Win32.Refroso.fyfc
BitDefender Gen:Heur.ManBat.1
NANO-Antivirus Trojan.Win32.Drop.npvtr
MicroWorld-eScan Gen:Heur.ManBat.1
Tencent Win32.Backdoor.Bredolab.jhm
Ad-Aware Gen:Heur.ManBat.1
Sophos Mal/Generic-S
Comodo TrojWare.Win32.VB.GE@4pqh5b
BitDefenderTheta AI:Packer.CB444DC315
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.VirRansom.dc
Emsisoft Gen:Heur.ManBat.1 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Backdoor/Bredolab.ipr
Webroot W32.Malware.Gen
Avira TR/Crypt.ASPM.Gen
eGambit Unsafe.AI_Score_100%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft TrojanDropper:Win32/Bifrose.F
AegisLab Trojan.Win32.Generic.lqzM
ZoneAlarm Trojan.Win32.Refroso.fyfc
GData Gen:Heur.ManBat.1
TACHYON Backdoor/W32.Bredolab.219037
AhnLab-V3 Trojan/Win32.Refroso.C62445
McAfee Artemis!188680B349DE
MAX malware (ai score=100)
VBA32 Malware-Cryptor.VB.gen.1
Malwarebytes Generic.Trojan.Dropper.DDS
Panda Generic Malware
Rising Dropper.Bifrose!8.87C (CLOUD)
Yandex Trojan.DR.Bifrose!inD/clRlRdI
Ikarus Trojan.Win32.VBKrypt
Fortinet W32/Bifrose.NKY!tr
AVG Win32:Bifrose-ESM [Trj]

How to remove TrojanDropper:Win32/Bifrose.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 TrojanDropper:Win32/Bifrose.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 TrojanDropper:Win32/Bifrose.F 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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