T1539 Steal Web Session Cookie

This diagnostic statement provides for securely configuring production systems. This includes hardening default configurations and making security-focused setting adjustments to reduce the attack surface, enforce best practices, and protect sensitive data thereby mitigating adversary exploitation.

This diagnostic statement provides for limiting unnecessary software, services, ports, protocols, etc. Ensuring systems only have installed and enabled what is essential for their operation reduces the attack surface and minimizes vulnerabilities, which mitigates a wide range of techniques.

This diagnostic statement protects against Steal Web Session Cookie through the use of privileged account management and the use of multi-factor authentication.

This diagnostic statement protects against Steal Web Session Cookie through the use of verifying integrity of software/firmware, loading software that is trusted, ensuring privileged process integrity and checking software signatures.

This diagnostic statement is related to the implementation of a patch management program. Applying patches and upgrades for products and systems provided by vendors mitigates the risk of adversaries exploiting known vulnerabilities. Regularly updating web browsers, password managers, and related software to the latest versions reduces the risk of vulnerabilities being exploited by attackers to extract stored credentials or steal web session cookies.

This diagnostic statement provides protection from Steal Web Session Cookie through the implementation of security configuration baselines for OS, software, file integrity monitoring and imaging. Baseline security configuration including the automated deletion of cookies can help protect against adversaries attempting to compromise and modify software and its configurations.

This diagnostic statement protects against Steal Web Session Cookie through the use of revocation of keys and key management. Employing key protection strategies for key material used as part of multifactor authentication in authentication processes for web applications using cookies, limitations to specific accounts along with access control mechanisms provides protection against adversaries attempting to steal session cookies.

This diagnostic statement provides for implementing tools and measures for web-based content and browser security settings that can help prevent session cookie theft.

This diagnostic statement describes how the organization implement appropriate authentication requirements, including selecting mechanisms based on risk, utilizing multi-factor authentication where necessary, and safeguarding the storage of authenticators like pins and passwords to protect sensitive access credentials.

This diagnostic statement protects against Steal Web Session Cookie through the use of hardened access control policies, secure defaults, password complexity requirements, multifactor authentication requirements, and removal of terminated accounts.

Entra ID's continuous access evaluation is a security control implemented by enabling services to subscribe to critical Microsoft Entra events. Those events can then be evaluated and enforced near real time. This process enables tenant users lose access to organizational SharePoint Online files, email, calendar, or tasks, and Teams from Microsoft 365 client apps within minutes after a critical event is detected. The following events are currently evaluated: User Account is deleted or disabled Password for a user is changed or reset Multifactor authentication is enabled for the user Administrator explicitly revokes all refresh tokens for a user High user risk detected by Microsoft Entra ID Protection License Requirements: Continuous access evaluation will be included in all versions of Microsoft 365.

Microsoft recommended the use of Passwordless authentication. This method provides the most secure MFA sign-in process by replacing the password with something you have, plus something you are or something you know.(e.g., Biometric, FIDO2 security keys, Microsoft’s Authenticator app). When combined with Conditional Access policies, Passwordless Authentication can significantly protect against the likelihood of adversary activity from credential attacks (e.g., token theft, etc.). License Requirements: All Microsoft Entra ID licenses

M365's Defender Attack Simulation Training allows organizations to automate the simulation of benign real-world cyberattacks. These simulation automations feature social engineering techniques, payloads, and can start on an automated schedule. This detection focused security control partially improves organizations security posture by continuously conduct attack simulations that fine tune analytics, and provide hands-on training for users and cyber professionals to improve response capabilities. The following social engineering techniques are available: Credential Harvest: Attempts to collect credentials by taking users to a well-known looking website with input boxes to submit a username and password. Malware Attachment: Adds a malicious attachment to a message. When the user opens the attachment, arbitrary code is run that helps the attacker compromise the target's device. Link in Attachment: A type of credential harvest hybrid. An attacker inserts a URL into an email attachment. The URL within the attachment follows the same technique as credential harvest. Link to Malware: Runs some arbitrary code from a file hosted on a well-known file sharing service. The message sent to the user contains a link to this malicious file, opening the file and helping the attacker compromise the target's device. Drive-by URL: The malicious URL in the message takes the user to a familiar-looking website that silently runs and/or installs code on the user's device. OAuth Consent Grant: The malicious URL asks users to grant permissions to data for a malicious Azure Application. License Requirements: Microsoft 365 E5 or Microsoft Defender for Office 365 Plan 2.

M365's Defender Attack Simulation Training allows organizations to automate the simulation of benign real-world cyberattacks. These simulation automations feature social engineering techniques, payloads, and can start on an automated schedule. This detection focused security control partially improves organizations security posture by continuously conduct attack simulations that fine tune analytics, and provide hands-on training for users and cyber professionals to improve response capabilities. The following social engineering techniques are available: Credential Harvest: Attempts to collect credentials by taking users to a well-known looking website with input boxes to submit a username and password. Malware Attachment: Adds a malicious attachment to a message. When the user opens the attachment, arbitrary code is run that helps the attacker compromise the target's device. Link in Attachment: A type of credential harvest hybrid. An attacker inserts a URL into an email attachment. The URL within the attachment follows the same technique as credential harvest. Link to Malware: Runs some arbitrary code from a file hosted on a well-known file sharing service. The message sent to the user contains a link to this malicious file, opening the file and helping the attacker compromise the target's device. Drive-by URL: The malicious URL in the message takes the user to a familiar-looking website that silently runs and/or installs code on the user's device. OAuth Consent Grant: The malicious URL asks users to grant permissions to data for a malicious Azure Application. License Requirements: Microsoft 365 E5 or Microsoft Defender for Office 365 Plan 2.