VirTool:Win32/Obfuscator.ARL

Written by Robert Bailey

What is VirTool:Win32/Obfuscator.ARL infection?

In this post you will certainly discover about the definition of VirTool:Win32/Obfuscator.ARL and its unfavorable impact on your computer. Such ransomware are a kind of malware that is clarified by online fraudulences to demand paying the ransom money by a victim.

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Most of the cases, VirTool:Win32/Obfuscator.ARL ransomware will advise its victims to start funds move for the function of counteracting the amendments that the Trojan infection has actually presented to the target’s gadget.

VirTool:Win32/Obfuscator.ARL Summary

These alterations 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.
  • 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.
  • A process attempted to delay the analysis task.;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to stop active services;
  • 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
  • Attempts to modify browser security settings;
  • 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 disable Windows Defender;
  • 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.
  • Attempts to modify user notification settings;
  • Ciphering the documents located on the target’s hard disk drive — so the target can no longer utilize the information;
  • Preventing regular access to the victim’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
z.whorecord.xyz Ransom.Exxroute.A3
a.tomx.xyz Ransom.Exxroute.A3

VirTool:Win32/Obfuscator.ARL

One of the most normal networks whereby VirTool:Win32/Obfuscator.ARL Ransomware Trojans are infused are:

  • By means of phishing e-mails;
  • As a repercussion of individual winding up on a resource that organizes a destructive software application;

As soon as the Trojan is successfully infused, it will either cipher the information on the target’s computer or prevent the tool from working in an appropriate manner – while additionally placing a ransom money note that mentions the need for the victims to impact the payment for the objective of decrypting the documents or bring back the data system back to the first problem. In the majority of circumstances, the ransom note will certainly show up when the client reboots the PC after the system has actually currently been harmed.

VirTool:Win32/Obfuscator.ARL distribution channels.

In different corners of the world, VirTool:Win32/Obfuscator.ARL grows by jumps and also bounds. Nonetheless, the ransom money notes as well as techniques of extorting the ransom amount may vary depending on particular regional (local) settings. The ransom notes and techniques of obtaining the ransom money quantity may differ depending on certain neighborhood (regional) setups.

Ransomware injection

For example:

    Faulty alerts about unlicensed software program.

    In specific areas, the Trojans usually wrongfully report having actually found some unlicensed applications enabled on the sufferer’s gadget. The sharp then requires the customer to pay the ransom.

    Faulty statements about unlawful web content.

    In nations where software program piracy is much less prominent, this technique is not as efficient for the cyber frauds. Alternatively, the VirTool:Win32/Obfuscator.ARL popup alert might incorrectly claim to be stemming from a law enforcement institution and will report having located kid pornography or other prohibited data on the gadget.

    VirTool:Win32/Obfuscator.ARL popup alert might falsely declare to be deriving from a law enforcement organization and also will certainly report having situated kid porn or other prohibited data on the device. The alert will similarly consist of a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: B35DFCF1
md5: 5a0885e881476ce8eb9c01c9172a1a19
name: 5A0885E881476CE8EB9C01C9172A1A19.mlw
sha1: ea1ab3ecb5b89ead02f0b9e199059ade6b6fda19
sha256: 186ad158355aeb32d0d3fc865f5be3f984fb4d2691fe6bb52e15fb14cb1a9fe5
sha512: 8c43d85f84da34ca51a7f5554e26ca784415652a199687dd6839ff03bf66f5f9a59babc8852927552369020f7c7313f81e0585525e6f16dc773360c04e608731
ssdeep: 1536:+vuSn7qMM7pGLPYtPtM10fW3Zt61QNYgPAFqliYK20m:VX1PVfW3Zt61atee0m
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

VirTool:Win32/Obfuscator.ARL also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader24.37424
MicroWorld-eScan Trojan.Agent.CFTI
FireEye Generic.mg.5a0885e881476ce8
CAT-QuickHeal Ransom.Exxroute.A3
ALYac Trojan.Agent.CFTI
Malwarebytes Malware.AI.718437751
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Upatre.a!c
K7AntiVirus Trojan ( 005137001 )
BitDefender Trojan.Agent.CFTI
K7GW Trojan ( 005137001 )
Cybereason malicious.881476
BitDefenderTheta Gen:NN.ZexaF.34804.gqW@aag0EKki
Cyren W32/S-e58da15a!Eldorado
Symantec Packed.Generic.493
TrendMicro-HouseCall Ransom_CERBER.SM37
Paloalto generic.ml
ClamAV Win.Dropper.Ramnit-9235357-0
Kaspersky HEUR:Trojan.Win32.Generic
NANO-Antivirus Trojan.Win32.Farfli.enpqqy
Rising Trojan.Kryptik!1.ABF9 (CLASSIC)
Ad-Aware Trojan.Agent.CFTI
Sophos ML/PE-A + Mal/Elenoocka-E
Comodo TrojWare.Win32.Crypt.C@7vajd0
F-Secure Heuristic.HEUR/AGEN.1120894
McAfee-GW-Edition BehavesLike.Win32.Dropper.nh
Emsisoft Trojan.Agent.CFTI (B)
SentinelOne Static AI – Malicious PE – Ransomware
Jiangmin TrojanDownloader.Upatre.agbm
Avira HEUR/AGEN.1120894
Antiy-AVL Trojan[Backdoor]/Win32.Farfli
Microsoft VirTool:Win32/Obfuscator.ARL
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.Agent.CFTI
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Cerber.R198079
Acronis suspicious
VBA32 TrojanDownloader.Upatre
APEX Malicious
ESET-NOD32 a variant of Win32/Kryptik.FQXP
Tencent Malware.Win32.Gencirc.114b079e
Yandex Trojan.GenAsa!C/Aqt9ikhx0
MAX malware (ai score=81)
Fortinet W32/GenKryptik.AFCC!tr
Panda Trj/GdSda.A
Qihoo-360 Win32/Trojan.Downloader.361

How to remove VirTool:Win32/Obfuscator.ARL 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 GridinSoft2

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.3.

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 VirTool:Win32/Obfuscator.ARL 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 VirTool:Win32/Obfuscator.ARL 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/products/

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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