Win32/Virlock.D

What is Win32/Virlock.D infection?

In this post you will locate concerning the definition of Win32/Virlock.D and also its negative effect on your computer. Such ransomware are a form of malware that is specified by on-line frauds to require paying the ransom money by a sufferer.

Most of the cases, Win32/Virlock.D virus will certainly instruct its sufferers to initiate funds move for the objective of counteracting the changes that the Trojan infection has introduced to the sufferer’s tool.

Win32/Virlock.D Summary

These modifications 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.
• Detected script timer window indicative of sleep style evasion;
• 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.

• 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.
• A scripting utility was executed;
• Uses Windows utilities for basic functionality;
• A process attempted to delay the analysis task by a long amount of time.;
• 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!
• 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.
• Likely virus infection of existing system binary;
• 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 Explorer settings to prevent file extensions from being displayed;
• Attempts to modify Explorer settings to prevent hidden files from being displayed;
• Uses suspicious command line tools or Windows utilities;
• Ciphering the documents located on the sufferer’s hard drive — so the victim can no longer utilize the information;
• Preventing normal 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.

Win32/Virlock.D

The most normal networks where Win32/Virlock.D Ransomware are injected are:

• By ways of phishing emails;
• As a repercussion of user ending up on a source that organizes a harmful software;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the information on the victim’s computer or stop the tool from working in a proper fashion – while likewise putting a ransom note that mentions the demand for the victims to effect the settlement for the objective of decrypting the records or bring back the file system back to the initial problem. In the majority of circumstances, the ransom money note will certainly come up when the client restarts the PC after the system has already been damaged.

Win32/Virlock.D circulation networks.

In numerous edges of the world, Win32/Virlock.D expands by jumps as well as bounds. However, the ransom money notes as well as tricks of extorting the ransom amount may vary depending on specific neighborhood (regional) setups. The ransom notes as well as tricks of obtaining the ransom money quantity might differ depending on certain neighborhood (local) settings.

As an example:

Faulty signals about unlicensed software.

In particular locations, the Trojans frequently wrongfully report having actually identified some unlicensed applications allowed on the target’s gadget. The sharp then demands the user to pay the ransom.

Faulty declarations about unlawful web content.

In nations where software application piracy is less preferred, this method is not as effective for the cyber fraudulences. Conversely, the Win32/Virlock.D popup alert might incorrectly assert to be originating from a police establishment and will report having located child pornography or other prohibited information on the gadget.

Win32/Virlock.D popup alert may incorrectly assert to be acquiring from a legislation enforcement institution as well as will certainly report having located child pornography or other prohibited data on the device. The alert will in a similar way include a need for the customer to pay the ransom money.

Technical details

File Info:
crc32: 3A828AEEmd5: 31b879f1a1da4dec9e94e587ffe578acname: 31B879F1A1DA4DEC9E94E587FFE578AC.mlwsha1: 5a6f54ecdad8b70de604da8dbf468762adf36cb7sha256: 912f5e8a21a87b92fa602969895dbc072dd7b5d3e1230cd854b8ed886f2d5a6fsha512: 2176599b0fb2015e377f4bebc1b3c8e6154ad76fbed5da74dd04d18d610b01909d5758f84d96be5b45bf9e404b15bb1004b42a2f2778de1ae8c95360e4027edessdeep: 6144:67tjhCMPh41mbSXaVvjFyaMcEK1mLoqte7RkVENIaqoSh8plhhJM5RkbZtDyE:6BjhCuIqVxvN1mLxwRiENIanShsY5Rktype: MS-DOS executable, MZ for MS-DOS
Version Info:
0: [No Data]

Win32/Virlock.D also known as:

How to remove Win32/Virlock.D 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

Run the setup file.

Press “Install” button.

Once installed, Anti-Malware will automatically run.

Wait for the Anti-Malware scan to complete.

Click on “Clean Now”.

Are Your Protected?

If the guide doesn’t help you to remove Win32/Virlock.D you can always ask me in the comments for getting help.

1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server