What is Win32/VB.QFN infection?

In this post you will certainly discover concerning the interpretation of Win32/VB.QFN as well as its adverse effect on your computer. Such ransomware are a form of malware that is specified by on the internet frauds to require paying the ransom by a sufferer.

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In the majority of the instances, Win32/VB.QFN infection will instruct its victims to launch funds move for the objective of reducing the effects of the amendments that the Trojan infection has actually introduced to the target’s gadget.

Win32/VB.QFN 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.;
  • 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.
  • Unconventionial binary language: Chinese (Simplified);
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • 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
  • 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.
  • Operates on local firewall’s policies and settings;
  • Creates a copy of itself;
  • Created a service that was not started;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Ciphering the papers situated on the victim’s disk drive — so the target can no longer make use of the information;
  • 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.


One of the most common networks whereby Win32/VB.QFN Trojans are infused are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a consequence of customer winding up on a resource that holds a harmful software program;

As quickly as the Trojan is successfully infused, it will either cipher the data on the sufferer’s computer or avoid the tool from working in an appropriate manner – while additionally placing a ransom note that discusses the need for the sufferers to impact the settlement for the function of decrypting the files or recovering the data system back to the first problem. In the majority of circumstances, the ransom money note will certainly turn up when the customer restarts the COMPUTER after the system has actually currently been harmed.

Win32/VB.QFN distribution channels.

In various edges of the world, Win32/VB.QFN grows by jumps and also bounds. Nonetheless, the ransom money notes as well as tricks of obtaining the ransom money quantity might vary depending on particular local (regional) setups. The ransom money notes as well as tricks of obtaining the ransom quantity might differ depending on certain regional (local) settings.

Ransomware injection

As an example:

    Faulty notifies about unlicensed software.

    In particular areas, the Trojans usually wrongfully report having actually identified some unlicensed applications allowed on the target’s tool. The sharp then demands the individual to pay the ransom.

    Faulty statements about illegal material.

    In nations where software piracy is much less preferred, this approach is not as reliable for the cyber frauds. Alternatively, the Win32/VB.QFN popup alert might falsely claim to be stemming from a police organization and will certainly report having situated kid porn or various other illegal information on the tool.

    Win32/VB.QFN popup alert might wrongly claim to be acquiring from a law enforcement organization and will report having situated child porn or other prohibited data on the gadget. The alert will similarly include a need for the user to pay the ransom money.

Technical details

File Info:

crc32: A901839A
md5: bc1c61848e6af6e6c80947784c6d5580
name: BC1C61848E6AF6E6C80947784C6D5580.mlw
sha1: 911f9fcff888dd7812a204cecc7c394c5e1b324e
sha256: 81881c777a477b9a19d045342f0934cc9a45cd0de76fca0a436cd1070ede90af
sha512: 49b8d383112ea962f765367e6bd1b410753099fc54b922508c484bdf2d5b9276f189584ee88ac34710389d3aae02c5d8201ec2aaab6057dbb9cdd56b3054ead4
ssdeep: 768:bUOmfmt14CV83wPOKzM7t3P6m6u+4DasC4TCQuOK9zNnoAmkZBf3IDB:bjt14CVYwPOKzM7t9x+4DeUKFN/nfYV
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

Translation: 0x0804 0x04b0
InternalName: qs3V9i0dl8H5hbcagOFOyUDWaeUxW7oj
FileVersion: 1.01.0001
ProductName: ssqvgnuLmlBrulKnSQynHx
ProductVersion: 1.01.0001
OriginalFilename: qs3V9i0dl8H5hbcagOFOyUDWaeUxW7oj.exe

Win32/VB.QFN also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 000a918f1 )
Elastic malicious (high confidence)
DrWeb Trojan.Siggen3.19906
Cynet Malicious (score: 100)
ALYac Gen:Variant.Razy.728993
Cylance Unsafe
Zillya Trojan.Jorik.Win32.23815
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_70% (D)
Alibaba Trojan:Win32/Blocker.401edf6b
K7GW Trojan ( 000a918f1 )
Cybereason malicious.48e6af
Cyren W32/S-a8001a52!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/VB.QFN
APEX Malicious
TotalDefense Win32/VBInject.O!generic
Avast Win32:Trojan-gen
ClamAV Win.Trojan.Downloader-6186
Kaspersky Trojan-Ransom.Win32.Blocker.azmd
BitDefender Gen:Variant.Razy.728993
NANO-Antivirus Trojan.Win32.Blocker.fkiruu
SUPERAntiSpyware Trojan.Agent/Gen-Falint[Cont]
MicroWorld-eScan Gen:Variant.Razy.728993
Tencent Malware.Win32.Gencirc.11496a06
Ad-Aware Gen:Variant.Razy.728993
Sophos ML/PE-A + Mal/VBCheMan-C
Comodo Malware@#2fj9ml1v8fqkk
BitDefenderTheta AI:Packer.DB02333E1F
VIPRE LooksLike.Win32.Malware!vb (v)
McAfee-GW-Edition BehavesLike.Win32.PWSSpyeye.pc
Emsisoft Gen:Variant.Razy.728993 (B)
Jiangmin Trojan/Generic.szbx
Webroot W32.Rogue.Gen
Avira TR/Crypt.ULPM.Gen
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/Wacatac.B!ml
GData Gen:Variant.Razy.728993
TACHYON Ransom/W32.VB-Blocker.159744.F
AhnLab-V3 Trojan/Win32.Jorik.C133996
McAfee Artemis!BC1C61848E6A
MAX malware (ai score=100)
VBA32 Hoax.Blocker
Malwarebytes Malware.Heuristic.1003
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_DOWNLOADER_00010a1.TOMA
Rising Ransom.Blocker!8.12A (CLOUD)
SentinelOne Static AI – Malicious PE
Fortinet W32/VB.PWQ!tr
AVG Win32:Trojan-gen
Qihoo-360 Malware.Radar02.Gen

How to remove Win32/VB.QFN 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 Win32/VB.QFN 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 Win32/VB.QFN 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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