# T1087.001 - Local Account
## [Description from ATT&CK](https://attack.mitre.org/techniques/T1087/001)
<blockquote>Adversaries may attempt to get a listing of local system accounts. This information can help adversaries determine which local accounts exist on a system to aid in follow-on behavior.

Commands such as <code>net user</code> and <code>net localgroup</code> of the [Net](https://attack.mitre.org/software/S0039) utility and <code>id</code> and <code>groups</code>on macOS and Linux can list local users and groups. On Linux, local users can also be enumerated through the use of the <code>/etc/passwd</code> file.</blockquote>

## Atomic Tests

- [Atomic Test #1 - Enumerate all accounts (Local)](#atomic-test-1---enumerate-all-accounts-local)

- [Atomic Test #2 - View sudoers access](#atomic-test-2---view-sudoers-access)

- [Atomic Test #3 - View accounts with UID 0](#atomic-test-3---view-accounts-with-uid-0)

- [Atomic Test #4 - List opened files by user](#atomic-test-4---list-opened-files-by-user)

- [Atomic Test #5 - Show if a user account has ever logged in remotely](#atomic-test-5---show-if-a-user-account-has-ever-logged-in-remotely)

- [Atomic Test #6 - Enumerate users and groups](#atomic-test-6---enumerate-users-and-groups)

- [Atomic Test #7 - Enumerate users and groups](#atomic-test-7---enumerate-users-and-groups)

- [Atomic Test #8 - Enumerate all accounts on Windows (Local)](#atomic-test-8---enumerate-all-accounts-on-windows-local)

- [Atomic Test #9 - Enumerate all accounts via PowerShell (Local)](#atomic-test-9---enumerate-all-accounts-via-powershell-local)

- [Atomic Test #10 - Enumerate logged on users via CMD (Local)](#atomic-test-10---enumerate-logged-on-users-via-cmd-local)


<br/>

## Atomic Test #1 - Enumerate all accounts (Local)
Enumerate all accounts by copying /etc/passwd to another file

**Supported Platforms:** Linux


**auto_generated_guid:** f8aab3dd-5990-4bf8-b8ab-2226c951696f





#### Inputs:
| Name | Description | Type | Default Value |
|------|-------------|------|---------------|
| output_file | Path where captured results will be placed | Path | /tmp/T1087.001.txt|


#### Attack Commands: Run with `sh`! 


```sh
cat /etc/passwd > #{output_file}
cat #{output_file}
```

#### Cleanup Commands:
```sh
rm -f #{output_file}
```





<br/>
<br/>

## Atomic Test #2 - View sudoers access
(requires root)

**Supported Platforms:** Linux, macOS


**auto_generated_guid:** fed9be70-0186-4bde-9f8a-20945f9370c2





#### Inputs:
| Name | Description | Type | Default Value |
|------|-------------|------|---------------|
| output_file | Path where captured results will be placed | Path | /tmp/T1087.001.txt|


#### Attack Commands: Run with `sh`!  Elevation Required (e.g. root or admin) 


```sh
sudo cat /etc/sudoers > #{output_file}
cat #{output_file}
```

#### Cleanup Commands:
```sh
rm -f #{output_file}
```





<br/>
<br/>

## Atomic Test #3 - View accounts with UID 0
View accounts with UID 0

**Supported Platforms:** Linux, macOS


**auto_generated_guid:** c955a599-3653-4fe5-b631-f11c00eb0397





#### Inputs:
| Name | Description | Type | Default Value |
|------|-------------|------|---------------|
| output_file | Path where captured results will be placed | Path | /tmp/T1087.001.txt|


#### Attack Commands: Run with `sh`! 


```sh
grep 'x:0:' /etc/passwd > #{output_file}
cat #{output_file} 2>/dev/null
```

#### Cleanup Commands:
```sh
rm -f #{output_file} 2>/dev/null
```





<br/>
<br/>

## Atomic Test #4 - List opened files by user
List opened files by user

**Supported Platforms:** Linux, macOS


**auto_generated_guid:** 7e46c7a5-0142-45be-a858-1a3ecb4fd3cb






#### Attack Commands: Run with `sh`! 


```sh
username=$(id -u -n) && lsof -u $username
```






<br/>
<br/>

## Atomic Test #5 - Show if a user account has ever logged in remotely
Show if a user account has ever logged in remotely

**Supported Platforms:** Linux


**auto_generated_guid:** 0f0b6a29-08c3-44ad-a30b-47fd996b2110





#### Inputs:
| Name | Description | Type | Default Value |
|------|-------------|------|---------------|
| output_file | Path where captured results will be placed | Path | /tmp/T1087.001.txt|


#### Attack Commands: Run with `sh`! 


```sh
lastlog > #{output_file}
cat #{output_file}
```

#### Cleanup Commands:
```sh
rm -f #{output_file}
```



#### Dependencies:  Run with `sh`!
##### Description: Check if lastlog command exists on the machine
##### Check Prereq Commands:
```sh
if [ -x "$(command -v lastlog)" ]; then exit 0; else exit 1; fi
```
##### Get Prereq Commands:
```sh
sudo apt-get install login; exit 1;
```




<br/>
<br/>

## Atomic Test #6 - Enumerate users and groups
Utilize groups and id to enumerate users and groups

**Supported Platforms:** Linux, macOS


**auto_generated_guid:** e6f36545-dc1e-47f0-9f48-7f730f54a02e






#### Attack Commands: Run with `sh`! 


```sh
groups
id
```






<br/>
<br/>

## Atomic Test #7 - Enumerate users and groups
Utilize local utilities to enumerate users and groups

**Supported Platforms:** macOS


**auto_generated_guid:** 319e9f6c-7a9e-432e-8c62-9385c803b6f2






#### Attack Commands: Run with `sh`! 


```sh
dscl . list /Groups
dscl . list /Users
dscl . list /Users | grep -v '_'
dscacheutil -q group
dscacheutil -q user
```






<br/>
<br/>

## Atomic Test #8 - Enumerate all accounts on Windows (Local)
Enumerate all accounts
Upon execution, multiple enumeration commands will be run and their output displayed in the PowerShell session

**Supported Platforms:** Windows


**auto_generated_guid:** 80887bec-5a9b-4efc-a81d-f83eb2eb32ab






#### Attack Commands: Run with `command_prompt`! 


```cmd
net user
dir c:\Users\
cmdkey.exe /list
net localgroup "Users"
net localgroup
```






<br/>
<br/>

## Atomic Test #9 - Enumerate all accounts via PowerShell (Local)
Enumerate all accounts via PowerShell. Upon execution, lots of user account and group information will be displayed.

**Supported Platforms:** Windows


**auto_generated_guid:** ae4b6361-b5f8-46cb-a3f9-9cf108ccfe7b






#### Attack Commands: Run with `powershell`! 


```powershell
net user
get-localuser
get-localgroupmember -group Users
cmdkey.exe /list
ls C:/Users
get-childitem C:\Users\
dir C:\Users\
get-localgroup
net localgroup
```






<br/>
<br/>

## Atomic Test #10 - Enumerate logged on users via CMD (Local)
Enumerate logged on users. Upon execution, logged on users will be displayed.

**Supported Platforms:** Windows


**auto_generated_guid:** a138085e-bfe5-46ba-a242-74a6fb884af3






#### Attack Commands: Run with `command_prompt`! 


```cmd
query user
```






<br/>
