(ví dụ, một phân đoạn mã, một phân đoạn dữ liệu, vv ). Trong chế độ bảo vệ, phân khúc đăng kýchứa chọn thay vì thông tin địa chỉ. Chọn chỉ mục trong mô tả Tài liệu này có thể không được phân phối dưới hình thức in hoặc sửa đổi trong bất kỳ cách nào mà không có sự cho phép bằng văn bản của nhà xuất bản. | 604 The Giant Black Book of Computer Viruses Legal Warning As of the date of this writing the KOH virus is illegal to export in executable form from the US. If you create an executable of it from the code in this book and export it you could be subject to immediate confiscation of all your property without recourse and possibly also to jail after a trial. There is however no restriction at present against exporting this code in printed form as in this book. The KOH Source KOH consists of several modules which must all be present on the disk to assemble it properly. is the main file which includes the loader the boot sector the interrupt handlers hard disk encryptor etc. is an include file that contains the code for the IDEA algorithm. is the FAT manager routines. These differ slightly from the originally listed with the BBS virus because the FAT is sometimes encrypted. The include file contains the pass phrase entry routines and contains the pseudo-random number generator. To build the KOH virus just assemble preferably using TASM. Then run the file you produce to infect and encrypt a diskette in the A drive or specify B on the command line if you d rather use your B drive . To migrate KOH to the hard disk just boot from the infected floppy. KOH will ask if you want it to migrate to the hard disk just answer yes. When you assemble KOH make sure the code does not overrun the scratchpad buffer where the disk is read into and written from. If you do it will cause KOH to crash. Since KOH is highly optimized and crunched into the minimum amount of space avai-able to it an assembler that did not optimize the assembly could cause code to overflow into this buffer which is located just below the boot sector. A Good Virus 605 The Source Source Listing for the Potassium Hydroxide virus. C 1995 by The King of Hearts All rights reserved. Licensed to American Eagle Publications Inc. for use in .
