Additional Cloud Roles
Where this stands
No Sigma rule can address this — the telemetry MITRE names has no Sigma logsource behind it.
None of MITRE's analytics for this technique name a log source that maps to a Sigma logsource — they describe abstract data ("Process::None"), API-hook telemetry, or prose channels with no reliable field names behind them.
What the technique is
An adversary may add additional roles or permissions to an adversary-controlled cloud account to maintain persistent access to a tenant. For example, adversaries may update IAM policies in cloud-based environments or add a new global administrator in Office 365 environments. With sufficient permissions, a compromised account can gain almost unlimited access to data and settings (including the ability to reset the passwords of other admins). This account modification may immediately follow Create Account or other malicious account activity. Adversaries may also modify existing Valid Accounts that they have compromised. This could lead to privilege escalation, particularly if the roles added allow for lateral movement to additional accounts. For example, in AWS environments, an adversary with appropriate permissions may be able to use the CreatePolicyVersion API to define a new version of an IAM policy or the AttachUserPolicy API to attach an IAM policy with additional or distinct permissions to a compromised user account. In some cases, adversaries may add roles to adversary-controlled accounts outside the victim cloud tenant. This allows these external accounts to perform actions inside the victim tenant without requiring the adversary to Create Account or modify a victim-owned account.
Read it on attack.mitre.orgWhat MITRE says you would watch
- AN0771
Detection of new IAM roles or policies attached to a user/service in AWS/GCP/Azure outside normal patterns or hours, often following account compromise.
- AN0772
Behavioral chain of a user being granted elevated privileges or roles in Entra ID or Okta following suspicious login or account creation activity.
- AN0773
Detection of new admin or role assignment actions within Microsoft 365/O365 environments to elevate access for persistence or lateral movement.
Technique names and descriptions © MITRE ATT&CK®, CC BY 4.0. Not endorsed by MITRE.