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 ... point of view) if it infects the diskette even when the disk is full, and it will have to overwrite a file to infect the disk 84 The Little Black...

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

... 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 2 56 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...

Ngày tải lên: 14/08/2014, 18:22

... 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

... before INFECT, the SHOULDRUN routine becomes SHOULDRUN: xor ah,ah SR1: nop int 1AH and al ,63 ret 64 The Little Black Book of Computer Viruses Next, move the first five bytes of the original ... relative to the start of the code in the EXE file. This is modified by DOS at load time. 18H 2 Relocation Tbl Offset Offset of the start of the relocation...

Ngày tải lên: 14/08/2014, 18:22

... run the virus, you’ll be able to see which files have been infected by it. 66 The Little Black Book of Computer Viruses its first sector. (And if it can’t find a disk anywhere, it will either go ... 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 0000:0500H....

Ngày tải lên: 14/08/2014, 18:22

... located at the initial code segment, offset 0, in the EXE file. This must be located in the disk file and read, and compared with the value 115 The Little Black Book of Computer Viruses int ... VSEG,VSTACK ;Virus code and stack segments grouped together 105 The Little Black Book of Computer Viruses Appendix B: The INTRUDER Virus WARNING! The INTRUDER v...

Ngày tải lên: 14/08/2014, 18:22

... RISK!! 129 The Little Black Book of Computer Viruses :1001500016FD7D5BB870005033C050CB33D2F736FC :100 160 00187CFEC28AEA33D2F7 361 A7C88 162 97CBC :100170008BD0C3B402B106D2E60AF58BCA86E98AEF :1001800016FD7D8A 362 97CCD1372FEC3BE1E7CBF50 :100190001E05B9DF01F3A4BE007CBF0005B90B004A :1001A000F3A4C3BEC87DB40EAC0AC07404CD10EB7A :1001B000F5C349424D42494F2020434F4D494F20FE :1001C000202...

Ngày tải lên: 14/08/2014, 18:22

... 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 F: The HEX File Loader The following ... PUT_ 360 , uses the file STEALTH.COM to put the STEALTH virus on a 360 kilobyte diskette. It formats the extra track required, and then moves the original boot secto...

Ngày tải lên: 14/08/2014, 18:22

... ISBN 0-89588-381-3. Similar to the above, for the 803 86. 166 The Little Black Book of Computer Viruses Viruses, etc. Philip Fites, Peter Johnston, Martin Kratz, The Computer Virus Crisis 1989 (Van ... time for motor startup is 1 56 The Little Black Book of Computer Viruses In all, this CD is one of the most fascinating collections of secret underg...

Ngày tải lên: 14/08/2014, 18:22