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-
- ****> UNIX Hacking Made Easy <****
- Brought to you by Shadow Lord (Shadow)
-
-
-
- -Background-
-
- UNIX is one of the most commonly used systems. Many small businesses and
- a few corporations run a UNIX system accessible by modem. Most UNIX systems
- run 1200 and 2400 baud modems, but a few of the older ones still use 300. UNIX
- is used for programming, mail, and various programs can be run from it. UNIX
- has suprisingly low security for such a widely-used system. Most of the
- operators leave the default passwords in, even on the accounts in which the
- user has no restrictions. This leaves UNIX systems wide open for hacking...
-
-
- -Getting On-
-
- I suggest using an exchange scanner (such as Code Thief or Fuckin' Hacker)
- to find numbers of UNIX systems. When you call, make sure you are not using
- ANSI-BBS emulation, UNIX does not support it, so everything will appear as
- garbage. Once you connect, hit return a few times and the 'login:' prompt
- should come up. UNIX systems are case-sensitive, so make sure you're using
- lower-case. After the account name is entered, the 'Password:' prompt will
- appear. Passwords are not echoed to the screen. If a correct account and
- password are given, you will be given access and some prompt, shown as a $ or #
- or some character of that sort will give you the go-ahead. I attempts, others give you unlimited tries.
- Bad login attempts are not reported to the system operator, so you can try as
- often as you like.
-
- -Once You're Inside-
-
- To find out what's in the directory that you're in, type 'ls' (list
- files). You can change directories much like you can in MS-DOS, use 'cd'
- (change directory) and than the name of the directory you want to go in. The
- 'ls' command does not specify what names are names of files and what names are
- names of directories, but if you try to cd into a file it will tell you that
- the directory is not valid. Use the 'rmdir' and 'mkdir' commands to make and
- remove directories. 'rm' also removes a file. The 'passwd' commands lets you
- change the password on the account that you're on. To find out who else is on,
- use the 'who' command. This will display the account name and if they are
- logged on locally or they are calling by modem (it will say tty01 or something
- to that nature). The 'mail' command works by typing 'mail whoever' and it will
- bring up the mail facility. Enter as much text as you like, and hit Cntrl-D to
- send the message. The 'wall' (write all) command allows you to broadcast to
- everyone logged on at the present time. ASCII uploads of regular or text files
- can be used for mail or broadcasts. Try sending a very large program in a
- message to the system operator if you'd like to piss him/her off.
- The 'cat' (display file) command lets you look at the contents of any file
- (format: cat filename). Hit Cntrl-D or escape or Cntrl-C (try them all; it
- depends on the system) to abort this process. If you are on the root account,
- you can use the 'su' (super-user) command to become the system operator (no
- restrictions). The su is obviously ideal. UNIX has a very good help facility
- which will give you an additional list of commands, etc.
-
-
- -Useful Information-
-
- In order to escape detection, go into the usr\adm directory and remove the
- file call sulog. This is the system usage logfile, it contains the information
- on who has called (like the last callers file on a bbs). Also, if you can get
- into the directory called etc you should display the file called passwd. It
- contains a list of all of the accounts and their passwords. Bad new, the
- accounts that have passwords are encrypted. But as I said before, a lot of
- people leave accounts unpassworded or at the default passwords. The format is:
- ACCOUNT NAME:password:0:0:description of purpose:/directory
- The 0:0 or whatever numbers show up are just some stuff you don't need, they
- are restrictions. Lower numbers means higher access pretty much. But if one
- account skips right from the account name to the numbers, than it is
- unpassworded.
-
- List Of Common UNIX Accounts
-
-
- root super sa startup shutdown daemon sys bin adm ncrm uucp
- nuucp sync lp admin sysadm unix rje guest demo sysbin
- sysadmin PCpath asg standard suggest dosadm pcuser ackmail
- altos informix r00t css backup gpcnet nobody ingress sysdiag
- convert async ingres cron asg sysinfo network dos filepro gpc
-
- Also try first names (all in lower case), and the name of the company (if you
- know it). I have seen all of the above accounts on UNIX systems. root, sa,
- super, adm, sysadm, and sysadmin are all high-level accounts. Some of the
- accounts are unpassworded, others simply use the account name as the password
- (what security!). The general rule is that after you enter account name at the
- login: prompt, if the password prompt appears very quickly then the account you
- have entered is not valid. If it takes a few seconds, then you've probably hit
- a valid account.
-
-
- -Close-
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