Использование альтернативных данных для аутентификации
Sub-techniques (4)
Adversaries may use alternate authentication material, such as password hashes, Kerberos tickets, and application access tokens, in order to move laterally within an environment and bypass normal system access controls. Authentication processes generally require a valid identity (e.g., username) along with one or more authentication factors (e.g., password, pin, physical smart card, token generator, etc.). Alternate authentication material is legitimately generated by systems after a user or application successfully authenticates by providing a valid identity and the required authentication factor(s). Alternate authentication material may also be generated during the identity creation process.(Citation: NIST Authentication)(Citation: NIST MFA) Caching alternate authentication material allows the system to verify an identity has successfully authenticated without asking the user to reenter authentication factor(s). Because the alternate authentication must be maintained by the system—either in memory or on disk—it may be at risk of being stolen through Credential Access techniques. By stealing alternate authentication material, adversaries are able to bypass system access controls and authenticate to systems without knowing the plaintext password or any additional authentication factors.
Примеры процедур |
|
| Название | Описание |
|---|---|
| APT29 |
APT29 used forged SAML tokens that allowed the actors to impersonate users and bypass MFA, enabling APT29 to access enterprise cloud applications and services.(Citation: Microsoft 365 Defender Solorigate)(Citation: Secureworks IRON RITUAL Profile) |
| FoggyWeb |
FoggyWeb can allow abuse of a compromised AD FS server's SAML token.(Citation: MSTIC FoggyWeb September 2021) |
| UNC2452 |
UNC2452 used forged SAML tokens that allowed the actors to impersonate users and bypass MFA, enabling UNC2452 to access enterprise cloud applications and services.(Citation: Microsoft 365 Defender Solorigate) |
Контрмеры |
|
| Контрмера | Описание |
|---|---|
| Privileged Account Management |
Manage the creation, modification, use, and permissions associated to privileged accounts, including SYSTEM and root. |
| User Account Management |
Manage the creation, modification, use, and permissions associated to user accounts. |
Обнаружение
Configure robust, consistent account activity audit policies across the enterprise and with externally accessible services.(Citation: TechNet Audit Policy) Look for suspicious account behavior across systems that share accounts, either user, admin, or service accounts. Examples: one account logged into multiple systems simultaneously; multiple accounts logged into the same machine simultaneously; accounts logged in at odd times or outside of business hours. Activity may be from interactive login sessions or process ownership from accounts being used to execute binaries on a remote system as a particular account. Correlate other security systems with login information (e.g., a user has an active login session but has not entered the building or does not have VPN access).
Ссылки
- Microsoft. (2016, April 15). Audit Policy Recommendations. Retrieved June 3, 2016.
- NIST. (n.d.). Multi-Factor Authentication (MFA). Retrieved January 30, 2020.
- NIST. (n.d.). Authentication. Retrieved January 30, 2020.
- Secureworks CTU. (n.d.). IRON RITUAL. Retrieved February 24, 2022.
- Microsoft 365 Defender Team. (2020, December 28). Using Microsoft 365 Defender to protect against Solorigate. Retrieved January 7, 2021.
- Ramin Nafisi. (2021, September 27). FoggyWeb: Targeted NOBELIUM malware leads to persistent backdoor. Retrieved October 4, 2021.
Связанные риски
Каталоги
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