How to write a virus program in c language

Put some executable files or any other files in the folder. As far as the technical terms are concerned, I would not be able to explain the program line by line. We declare a structure threeNum with three numbers - n1, n2 and n3, and define it in the main function as num.

As the name suggests, fseek seeks the cursor to the given record in the file. Thus, it destroys other files by infecting them. Finally, we close the file. This will waste a lot of memory and operation time.

You can download the source code from the following link: Create a new empty folder. An easier way to get to the required data can be achieved using fseek.

Getting data using fseek If you have many records inside a file and need to access a record at a specific position, you need to loop through all the records before it to get the record. So, always test the virus in a new folder by placing some sample files.

By using this website you agree to the terms thereof as described in here. Delete the folder and all the infected files after the testing process is done. Now every infected file is a new virus which is ready to re-infect.

Open the target file. Closing a file is performed using library function fclose. Reading from a text file Example 2: Reading from a binary file Function fread also take 4 arguments similar to fwrite function as above.

How to Compile the Program: When you open the file, you can see the integer you entered. The files infected by this virus are destroyed completely and cannot be recovered. Reading and writing to a binary file Functions fread and fwrite are used for reading from and writing to a file on the disk respectively in case of binary files.

Load the next file to infect and move to the step Writing to a text file Example 1: The infected file will also become a virus so that when executed, it is capable of spreading the infection to another file and so on. Load the copy of the virus itself onto the memory.

Now, inside the for loop, we store the value into the file using fwrite. The only difference is that, fprint and fscanf expects a pointer to the structure FILE. How to Test the Virus After the Compilation: The second parameter is the position of the record to be found, and the third parameter specifies the location where the offset starts.

Writing to a binary file To write into a binary file, you need to use the function fwrite. Anyone with a working knowledge of C should be easily able to understand the functions and other terms used in the program.

If the file does not exist, it will be created. If the file does not exists, it will be created. The functions takes four arguments: How the Virus Program Works? Reading and writing to a text file For reading and writing to a text file, we use the functions fprintf and fscanf.

If all the files are infected, close all the open files, unload them from the memory and exit. If the file does not exist, fopen returns NULL. With in a few seconds all the other files in the folder gets infected.

C Programming Files I/O

Search for files in the current directory. If you succesfully created the file from Example 1, running this program will get you the integer you entered.Sep 11,  · You can technically write and run a program in Notepad using any coding language available, but you must save the program in the correct format for the program to run.

All Notepad files save as text documents by K. Which language is used for writing the virus program?

How To Make Antivirus Using C++ Programming Language

Can we write in c, vb??? This program is an example of how to create a computer virus in C language. This program demonstrates a simple virus program which when executed creates a copy of itself in all the other files that are present in the same directory.

The computer language that you use to write your program can determine its portability.

Which language should use to Create a Virus!

That’s why so many people use C/C++ — C and C++ programs tend to be more portable than other programming languages. Determine your programming skill. When designing any program, consider your programming skill.

You may get a great idea for a program, but. Create simple virus by c programming language. (Only for study) Write c program which shutdown the window operating system?

Answer: Step 1: Write the following program in TURBO C. Write a c program which delete the all file of internet explorer so. What is most used programming language for writing trojans, worms & viruses? Update Cancel.

How to Create a Computer Virus?

How can I make virus using C language? What virus, bug, trojan, worm, or malware freaks you out the most? What language is used most often to write antivirus programs?

How to write a virus program in c language
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