The Little Black Book of Computer Viruses phần 5 pptx
... SEC_SIZE - 1]/SEC_SIZE and the size of the file in sectors. The file size in bytes is stored at the offset 1CH from the start of the directory entry at 0000: 050 0H. The number of sectors to load is ... on what kind of a computer it is.) Once the first sector (the boot sector) has been read into memory, the BIOS checks the last two bytes to see if they have the...
Ngày tải lên: 14/08/2014, 18:22
... COM file. 26 The Little Black Book of Computer Viruses essors. In the CP/M world, 64 kilobytes was all the memory a computer had. The lowest 256 bytes of that memory was reserved for the operating ... when they are correctly written. Which- ever assembler you decide to use, though, the viruses in this book 19 The Little Black Book of Computer Virus...
Ngày tải lên: 14/08/2014, 18:22
... sort? Per- haps they are the electronic analog of the simplest one-celled 8 The Little Black Book of Computer Viruses The Little Black Book of Computer Viruses Volume One: The Basic Technology By ... protected. 4 The Little Black Book of Computer Viruses day to day computing. Many people think of viruses as sort of a black art. The p...
Ngày tải lên: 14/08/2014, 18:22
The Little Black Book of Computer Viruses phần 3 docx
... Found Yes No 34 The Little Black Book of Computer Viruses cx:dx is used as the offset from the end of the file. Since the first thing the virus must do is place its code at the end of the COM file it ... [HANDLE] 44 The Little Black Book of Computer Viruses Now, with the main body of viral code appended to the end of the COM file under a...
Ngày tải lên: 14/08/2014, 18:22
The Little Black Book of Computer Viruses phần 4 potx
... completion of the program. Any other value indicates some kind of error, as determined by the 50 The Little Black Book of Computer Viruses program making the DOS call. So, the simplest COM program would ... risk! It’s not like any other computer program you’ve ever run! 52 The Little Black Book of Computer Viruses infecting every EXE file on the s...
Ngày tải lên: 14/08/2014, 18:22
The Little Black Book of Computer Viruses phần 6 pps
... DOS 92 The Little Black Book of Computer Viruses VIRUS_START: call GET_START ;get start address ;This is a trick to determine the location of the start of the program. We put ;the address of GET_START ... knows the disk is infected. Otherwise it can infect the disk. The STEALTH virus uses its own code as an ID. It reads the boot sector and compares the 8...
Ngày tải lên: 14/08/2014, 18:22
The Little Black Book of Computer Viruses phần 7 pot
... Viruses :10049000A2AF00FEC0A2FD00E80100C3E 851 007 356 :1004A0004C803EFD0000743FFE0EFD00BFAF00BE5D :1004B000AA00E8BB004 757 E87600 752 35F32C0AA60 :1004C000BFAF00BB4F00A0FD00B22BF6E203D88BFC :1004D000F3E89C0 057 E8C4FF7412E8760074DDFE70 :1004E00006FD005F32C0AAB0010AC0C35F32C0C3BC :1004F000BA0600B41ACD21BFAF00BEA300E8700 059 :10 050 00 057 BAAF00B93F00B44ECD210AC0 751 95F8C :10 051 00047AA...
Ngày tải lên: 14/08/2014, 18:22
The Little Black Book of Computer Viruses phần 8 potx
... Viruses :106F8000BB 357 A8A073C80 750 2B004B303F6E3 058 B :106F900041718BD88A2F8A77018A4F028A56068BD5 :106FA0005E0A8B46028EC0B801029CFF1E00708AEA :106FB000460C3C01746C5D071F5A595B5881C300 35 :106FC0000 250 FEC8FEC180FA80 753 453 5 152 5 657 A4 :106FD0001E 550 61FC607008BF38BFB47B400BB0092 :106FE00002F7E38BC849F3A4F89C588946145D1F47 :106FF0005F5E5A595B58B400FEC981EB0002CF9C1A :107000002EFF1...
Ngày tải lên: 14/08/2014, 18:22
The Little Black Book of Computer Viruses phần 9 docx
... and then run PUT_360 in the same directory as STEALTH.COM. The program disk has PUT programs for other formats, or you can modify PUT_360 to do it. 151 The Little Black Book of Computer Viruses Appendix ... from the location specified in dx,cx. Preserve ;ax, and return c set properly. Assumes es set up properly. READ_DISK: push ax mov bx,OFFSET SCRATCHBUF 1 45 The L...
Ngày tải lên: 14/08/2014, 18:22
The Little Black Book of Computer Viruses phần 10 potx
... motor startup is 156 The Little Black Book of Computer Viruses In all, this CD is one of the most fascinating collections of secret underground computer software on earth—a full 157 megabytes in ... San Fransisco) 1987, ISBN 0-8 958 8-381-3. Similar to the above, for the 80386. 166 The Little Black Book of Computer Viruses Viruses, etc. Philip Fites, P...
Ngày tải lên: 14/08/2014, 18:22