Worm:Win32/Vobfus!O

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

What is Worm:Win32/Vobfus!O infection?

In this post you will find about the meaning of Worm:Win32/Vobfus!O as well as its negative influence on your computer system. Such ransomware are a form of malware that is clarified by online fraudulences to require paying the ransom money by a sufferer.

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In the majority of the instances, Worm:Win32/Vobfus!O ransomware will certainly advise its targets to launch funds move for the purpose of reducing the effects of the modifications that the Trojan infection has actually presented to the target’s tool.

Worm:Win32/Vobfus!O Summary

These adjustments 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.
  • 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.

  • 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.
  • Creates a slightly modified copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Ciphering the documents situated on the target’s hard drive — so the target can no more utilize the information;
  • Preventing normal accessibility to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Worm:Win32/Vobfus!O

The most common channels where Worm:Win32/Vobfus!O Trojans are injected are:

  • By means of phishing emails;
  • As an effect of individual ending up on a resource that hosts a malicious software application;

As quickly as the Trojan is successfully infused, it will either cipher the data on the sufferer’s PC or avoid the device from operating in an appropriate fashion – while also positioning a ransom note that points out the demand for the victims to impact the payment for the objective of decrypting the documents or recovering the data system back to the preliminary problem. In most circumstances, the ransom note will come up when the client reboots the PC after the system has actually already been harmed.

Worm:Win32/Vobfus!O distribution channels.

In different edges of the world, Worm:Win32/Vobfus!O expands by leaps and bounds. Nevertheless, the ransom money notes and tricks of obtaining the ransom money amount might differ relying on specific neighborhood (local) settings. The ransom money notes and also tricks of obtaining the ransom quantity may vary depending on certain neighborhood (regional) setups.

Ransomware injection

For instance:

    Faulty informs concerning unlicensed software program.

    In specific locations, the Trojans often wrongfully report having identified some unlicensed applications allowed on the sufferer’s device. The sharp then demands the individual to pay the ransom money.

    Faulty statements about unlawful content.

    In nations where software piracy is less preferred, this method is not as reliable for the cyber fraudulences. Additionally, the Worm:Win32/Vobfus!O popup alert might incorrectly claim to be originating from a law enforcement establishment as well as will certainly report having situated kid pornography or other illegal information on the tool.

    Worm:Win32/Vobfus!O popup alert may wrongly declare to be obtaining from a regulation enforcement organization as well as will report having located kid porn or various other illegal data on the tool. The alert will similarly contain a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 25E63BDD
md5: c2dee2b6658df9ef062cf05afdcf93d1
name: C2DEE2B6658DF9EF062CF05AFDCF93D1.mlw
sha1: 83dc51c5f71a36b34888b963e29f6e1c9f55b4b6
sha256: 8b963f78ddaf1ed87b85194dec1ccaf5c3466eec73f53ec214a9b5c81b45692f
sha512: 8d63118dbb0fc69f024562783df74fab61afe97cdbc1fba4d524cc046aebed931b0440ec99df27df40591cbf70c7055a77c6b44809a7f67d9dd945bb5559b5cf
ssdeep: 6144:C8QVQ0yyUf9dgAVRKlqBiErIsKnPmb7/jWal+FfAje+5/RxoOsutOSD/uP39RWy:C83yUf9DRKlqgErIsKnPmb7/jWa1e+5
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

FileVersion: 1.00
Translation: 0x0409 0x04b0

Worm:Win32/Vobfus!O also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus EmailWorm ( 0054d10f1 )
Elastic malicious (high confidence)
DrWeb Worm.Siggen.11987
Cynet Malicious (score: 100)
ALYac Gen:Variant.Bulz.195571
Cylance Unsafe
Sangfor Win.Trojan.Changeup-6169544-0
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Worm:Win32/Vobfus.e0eb013a
K7GW EmailWorm ( 0054d10f1 )
Cybereason malicious.6658df
Baidu Win32.Virus.Virut.gen
Cyren W32/Vobfus.AA.gen!Eldorado
Symantec W32.Changeup
ESET-NOD32 Win32/Virut.NBP
APEX Malicious
TotalDefense Win32/FakeFLDR_i
Avast Win32:Vitro [Inf]
ClamAV Win.Trojan.VB-73740
Kaspersky Worm.Win32.Vobfus.evfh
BitDefender Gen:Variant.Bulz.195571
NANO-Antivirus Trojan.Win32.Vobfus.ewhyaa
ViRobot Trojan.Win32.A.Diple.253952.DC
SUPERAntiSpyware Trojan.Agent/Gen-AutoRun
MicroWorld-eScan Gen:Variant.Bulz.195571
Tencent Trojan.Win32.FakeFolder.gcy
Ad-Aware Gen:Variant.Bulz.195571
Sophos ML/PE-A + W32/SillyFDC-GS
Comodo Worm.Win32.VB.AUA@4o7zkg
BitDefenderTheta Gen:NN.ZevbaF.34608.pq1@ayXRb@ci
VIPRE Trojan.Win32.Vobfus.paa (v)
TrendMicro WORM_VOBFUS.SMAB
McAfee-GW-Edition VBObfus.er
FireEye Generic.mg.c2dee2b6658df9ef
Emsisoft Gen:Variant.Bulz.195571 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Kazy.502564
Microsoft Worm:Win32/Vobfus.gen!O
Arcabit Trojan.Bulz.D2FBF3
AegisLab Worm.Win32.WBNA.low6
GData Gen:Variant.Bulz.195571
AhnLab-V3 Trojan/Win32.Diple.R18781
Acronis suspicious
McAfee VBObfus.er
MAX malware (ai score=85)
VBA32 BScope.TrojanRansom.Blocker
Malwarebytes Malware.AI.30491124
Panda Trj/Genetic.gen
TrendMicro-HouseCall WORM_VOBFUS.SMAB
Rising Worm.VobfusEx!1.99DC (CLOUD)
Yandex Trojan.GenAsa!J9URsE4Z4kc
Ikarus Worm.Win32.Vobfus
Fortinet W32/Virtu.F
AVG Win32:Vitro [Inf]
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Kazy.HgIASOMA

How to remove Worm:Win32/Vobfus!O ransomware?

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

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 Worm:Win32/Vobfus!O 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 Worm:Win32/Vobfus!O 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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