Trojan:Win32/Vundo.QA

Written by Robert Bailey

What is Trojan:Win32/Vundo.QA infection?

In this article you will certainly locate concerning the interpretation of Trojan:Win32/Vundo.QA and its unfavorable influence on your computer. Such ransomware are a type of malware that is clarified by on the internet scams to require paying the ransom money by a sufferer.

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Most of the situations, Trojan:Win32/Vundo.QA infection will instruct its sufferers to start funds move for the objective of counteracting the amendments that the Trojan infection has introduced to the victim’s device.

Trojan:Win32/Vundo.QA 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.
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • A process attempted to delay the analysis task.;
  • 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.

  • 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.
  • 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
  • Exhibits possible ransomware file modification behavior;
  • 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.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a slightly modified copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents located on the target’s hard drive — so the target can no longer make use of the information;
  • Preventing regular access 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.

Trojan:Win32/Vundo.QA

One of the most normal channels where Trojan:Win32/Vundo.QA Ransomware 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 repercussion of user ending up on a resource that holds a harmful software application;

As soon as the Trojan is effectively injected, it will certainly either cipher the data on the sufferer’s computer or protect against the gadget from functioning in a proper manner – while additionally placing a ransom money note that discusses the requirement for the sufferers to effect the repayment for the objective of decrypting the files or restoring the file system back to the first condition. In the majority of circumstances, the ransom note will certainly turn up when the client reboots the PC after the system has actually already been harmed.

Trojan:Win32/Vundo.QA distribution channels.

In various corners of the globe, Trojan:Win32/Vundo.QA expands by jumps as well as bounds. However, the ransom money notes as well as techniques of obtaining the ransom amount may differ relying on specific local (regional) setups. The ransom money notes as well as techniques of extorting the ransom money amount might differ depending on specific local (regional) settings.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software program.

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

    Faulty statements concerning unlawful web content.

    In countries where software application piracy is much less preferred, this method is not as effective for the cyber scams. Additionally, the Trojan:Win32/Vundo.QA popup alert may wrongly assert to be originating from a police establishment and also will certainly report having located kid porn or various other unlawful data on the gadget.

    Trojan:Win32/Vundo.QA popup alert might wrongly claim to be obtaining from a law enforcement institution and will certainly report having located youngster pornography or other illegal information on the gadget. The alert will likewise contain a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: E6411568
md5: af726015c9bc4bb6cb68191d95cadd22
name: AF726015C9BC4BB6CB68191D95CADD22.mlw
sha1: caf61baa0a83f25060abd9b5b676143b23f8939e
sha256: 50b801af713a23f25009554db058d4e9a1aebe26d508e3d69211610f03bc5657
sha512: 948da171229cbe1d7ed6d8d117d9da237144f4aeb275fea5c38854ab88a3c81a5f94b610e4e9c9d7a4793e3baa2969d26661b8fd611efc47fe093bb8c9ada628
ssdeep: 3072:WSKkvlEpzJniAYNMZuzu/pNtMleb+a+/rcDuHpQDlzkXp0XI9:WSTtwRiKQ+jtb1Wr0uOD6ZMI9
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Vundo.QA also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb BackDoor.Butirat.49
Cynet Malicious (score: 100)
Cylance Unsafe
Zillya Trojan.PornoBlocker.Win32.2772
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
Alibaba Ransom:Win32/PornoBlocker.eafb1c76
K7GW Trojan ( 002451e21 )
K7AntiVirus Trojan ( 002451e21 )
Cyren W32/Zbot.DU.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/LockScreen.AGD
APEX Malicious
Avast Win32:Regrun-LX [Trj]
ClamAV Win.Packed.Zbot-9846369-0
Kaspersky Trojan-Ransom.Win32.PornoBlocker.acwi
BitDefender Gen:Heur.Conjar.9
NANO-Antivirus Trojan.Win32.PornoBlocker.dxplnp
ViRobot Trojan.Win32.A.PornoBlocker.194560.C
MicroWorld-eScan Gen:Heur.Conjar.9
Tencent Win32.Trojan.Pornoblocker.Lpuw
Ad-Aware Gen:Heur.Conjar.9
Sophos Mal/Generic-S
Comodo ApplicUnwnt.Win32.Hoax.ArchSMS.SG@4o0e5u
BitDefenderTheta AI:Packer.84EEE4211F
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition PWS-Spyeye.he
FireEye Generic.mg.af726015c9bc4bb6
Emsisoft Gen:Heur.Conjar.9 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/PornoBlocker.bxf
Avira TR/Crypt.ZPACK.Gen
eGambit Unsafe.AI_Score_94%
Microsoft Trojan:Win32/Vundo.QA
Arcabit Trojan.Conjar.9
AegisLab Trojan.Win32.PornoBlocker.j!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Heur.Conjar.9
TACHYON Ransom/W32.PornoBlocker.194560
AhnLab-V3 Trojan/Win32.PornoBlocker.C145911
Acronis suspicious
McAfee PWS-Spyeye.he
MAX malware (ai score=100)
VBA32 Trojan.Winlock.11235
Malwarebytes Malware.AI.1328682484
Panda Trj/Pacrypt.D
Rising Ransom.PornoBlocker!8.24E (CLOUD)
Yandex Trojan.GenAsa!1T1AlazoYNs
Ikarus Trojan-Ransom.PornoBlocker
Fortinet W32/Kryptik.ZVL!tr
AVG Win32:Regrun-LX [Trj]
Paloalto generic.ml
Qihoo-360 Win32/Ransom.PornoBlocker.HxQBAmYA

How to remove Trojan:Win32/Vundo.QA 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 Trojan:Win32/Vundo.QA 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 Trojan:Win32/Vundo.QA 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/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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