Decoding eval gzinflate base64_decode

Danilo Stern-Sapad
Jun 18, 2015 · 1 min read
<?php eval(gzinflate(base64_decode(‘encoded text‘))); ?>
Taken from
1. Save this snippet as decrypt.php
2. Save encoded PHP code in coded.txt
3. Create a blank file called decoded.txt (from shell do CHMOD 0666 decoded.txt)
4. Execute this script (visit decrypt.php in a web browser or do php decrypt.php in the shell)
5. Open decoded.txt, the PHP should be decrypted:
echo "\nDECODE nested eval(gzinflate()) by DEBO Jurgen <>\n\n";
echo "1. Reading coded.txt\n";
$fp1 = fopen ("coded.txt", "r");
$contents = fread ($fp1, filesize ("coded.txt"));
echo "2. Decoding\n";
while (preg_match("/eval\(gzinflate/",$contents)) {
$contents=preg_replace("/< \?|\?>/", "", $contents); eval(preg_replace("/eval/", "\$contents=", $contents)); } echo "3. Writing decoded.txt\n"; $fp2 = fopen("decoded.txt","w"); fwrite($fp2, trim($contents)); fclose($fp2);

Danilo Stern-Sapad

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Entrepreneur, Technologist & Product Guy

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