T1555.001.md

T1555.001 - Keychain

Description from ATT&CK

Adversaries may collect the keychain storage data from a system to acquire credentials. Keychains are the built-in way for macOS to keep track of users' passwords and credentials for many services and features such as WiFi passwords, websites, secure notes, certificates, and Kerberos. Keychain files are located in ~/Library/Keychains/,/Library/Keychains/, and /Network/Library/Keychains/. (Citation: Wikipedia keychain) The security command-line utility, which is built into macOS by default, provides a useful way to manage these credentials.

To manage their credentials, users have to use additional credentials to access their keychain. If an adversary knows the credentials for the login keychain, then they can get access to all the other credentials stored in this vault. (Citation: External to DA, the OS X Way) By default, the passphrase for the keychain is the user’s logon credentials.

Atomic Tests

• Atomic Test #1 - Keychain

Atomic Test #1 - Keychain

Keychain Files

~/Library/Keychains/

/Library/Keychains/

/Network/Library/Keychains/

Security Reference

Keychain dumper

Supported Platforms: macOS

Inputs:

Name	Description	Type	Default Value
cert_export	Specify the path of the certificates to export.	path	/tmp/certs.pem

Attack Commands: Run with sh!

security -h
security find-certificate -a -p > #{cert_export}
security import #{cert_export} -k