VHO:Trojan-Ransom.Win32.Agent

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

What is VHO:Trojan-Ransom.Win32.Agent infection?

In this post you will locate concerning the interpretation of VHO:Trojan-Ransom.Win32.Agent and also its adverse effect on your computer system. Such ransomware are a type of malware that is clarified by on the internet fraudulences to demand paying the ransom by a victim.

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Most of the situations, VHO:Trojan-Ransom.Win32.Agent virus will instruct its victims to initiate funds move for the function of counteracting the changes that the Trojan infection has presented to the victim’s gadget.

VHO:Trojan-Ransom.Win32.Agent Summary

These modifications can be as adheres to:

  • 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.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • A process created a hidden window;
  • 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.
  • The executable is compressed using UPX;
  • Creates an autorun.inf file;
  • Uses Windows utilities for basic functionality;
  • Attempts to delete volume shadow copies;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Modifies boot configuration settings;
  • 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.
  • Clears Windows events or logs;
  • Creates a copy of itself;
  • Attempts to disable UAC.

    User Account Control or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on PC.

    UAC includes several technologies 1:

    • File and egistry Virtualization;
    • Same-desktop Elevation;
    • Filtered Token;
    • User Interface Privilege Isolation;
    • Protected Mode Internet Explorer;
    • Installer Detection;
  • Attempts to modify UAC prompt behavior;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers located on the victim’s disk drive — so the sufferer can no longer utilize the information;
  • Preventing normal 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.

VHO:Trojan-Ransom.Win32.Agent

One of the most regular networks whereby VHO:Trojan-Ransom.Win32.Agent Trojans are injected are:

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

As quickly as the Trojan is effectively injected, it will either cipher the data on the sufferer’s PC or stop the tool from working in a correct fashion – while likewise positioning a ransom money note that points out the demand for the targets to impact the repayment for the purpose of decrypting the records or restoring the data system back to the initial problem. In most instances, the ransom money note will certainly come up when the client restarts the COMPUTER after the system has actually already been damaged.

VHO:Trojan-Ransom.Win32.Agent distribution channels.

In various edges of the world, VHO:Trojan-Ransom.Win32.Agent grows by leaps as well as bounds. However, the ransom notes as well as tricks of extorting the ransom money amount may vary depending on specific neighborhood (regional) setups. The ransom money notes and also methods of obtaining the ransom amount might differ depending on specific local (local) setups.

Ransomware injection

For instance:

    Faulty informs about unlicensed software application.

    In certain locations, the Trojans often wrongfully report having spotted some unlicensed applications allowed on the victim’s gadget. The alert after that demands the user to pay the ransom.

    Faulty statements about prohibited web content.

    In countries where software program piracy is much less popular, this approach is not as efficient for the cyber scams. Additionally, the VHO:Trojan-Ransom.Win32.Agent popup alert may incorrectly assert to be stemming from a law enforcement institution as well as will certainly report having situated youngster porn or various other unlawful information on the tool.

    VHO:Trojan-Ransom.Win32.Agent popup alert may falsely claim to be deriving from a law enforcement organization and also will report having situated youngster porn or other prohibited data on the tool. The alert will similarly contain a need for the customer to pay the ransom.

Technical details

File Info:

crc32: 71082517
md5: 64dfcd3e16b8c14448abd33f375e729f
name: 64DFCD3E16B8C14448ABD33F375E729F.mlw
sha1: 30b60f11ffb66361cad7b44996e2a4e8673f35fa
sha256: b83e430f6f40dc470096516a1780dc87e707a7cb3db07533ea672fdaf2a3ebf5
sha512: c3fcaaa55f599c7b1d4b2b30b33cae20db2319c0ce157ef4556a2996641278f4868f6220e254f80975f57eb0352f396e86973d0c6a4ce29f7bee1ed8d0195689
ssdeep: 6144:k0pJQOVwfYwXpcz8EPe+TyPseYLk8F/+Nj5Up:kAVifYwXpcne+ReYLdo9Up
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: taskhost.exe
FileVersion: 10.0.17763.831 (WinBuild.160101.0800)
CompanyName: Microsoft Corporation
ProductName: Microsoftxae Windowsxae Operating System
ProductVersion: 10.0.17763.831
FileDescription: Host Process for Windows Tasks
OriginalFilename: taskhost.exe
Translation: 0x0409 0x04b0

VHO:Trojan-Ransom.Win32.Agent also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 00577dec1 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop16.12853
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ransom.Avaddon.3
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_70% (D)
K7GW Trojan ( 00577dec1 )
Cybereason malicious.e16b8c
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Filecoder.Avaddon.C
APEX Malicious
Avast Win32:Trojan-gen
ClamAV Win.Ransomware.Avaddon-9852658-0
Kaspersky VHO:Trojan-Ransom.Win32.Agent.gen
BitDefender Gen:Variant.Ransom.Avaddon.3
MicroWorld-eScan Gen:Variant.Ransom.Avaddon.3
Ad-Aware Gen:Variant.Ransom.Avaddon.3
Sophos Troj/Avaddon-A
BitDefenderTheta Gen:NN.ZexaF.34690.qmKfam2btfoi
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
FireEye Generic.mg.64dfcd3e16b8c144
Emsisoft Gen:Variant.Ransom.Avaddon.3 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.DelShad.bhg
Avira TR/Crypt.FKM.Gen
eGambit Unsafe.AI_Score_100%
Microsoft Program:Win32/Wacapew.C!ml
Arcabit Trojan.Ransom.Avaddon.3
GData Gen:Variant.Ransom.Avaddon.3
AhnLab-V3 Ransomware/Win.Avaddon.C4481527
MAX malware (ai score=88)
VBA32 Trojan.DelShad
Panda Trj/GdSda.A
Rising Malware.Heuristic!ET#87% (RDMK:cmRtazp+XeZr4BqIcml4cO4VQDvb)
Yandex Trojan.DelShad!9+W8qxhoK3A
Ikarus Trojan-Ransom.Avaddon
Fortinet W32/Avaddon.C!tr.ransom
AVG Win32:Trojan-gen

How to remove VHO:Trojan-Ransom.Win32.Agent 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 GridinSoft2

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft3.

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 VHO:Trojan-Ransom.Win32.Agent 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 VHO:Trojan-Ransom.Win32.Agent you can always ask me in the comments for getting help.

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References

  1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server
  2. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  3. 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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