Suspicious Credential Added to Application or Service Principal in Entra ID (via azure)

ATT&CK techniques

Persistence → Lateral Movement

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1098.001Additional Cloud Credentials
Priv Esc
- T1098.001Additional Cloud Credentials
Defense Evasion
- T1550.001Application Access Token
Cred Access
Discovery
Lateral Movement
- T1550.001Application Access Token
Collection
C2
Exfiltration
Impact

What it detects

This rule detects new password or certificate credentials being added to an Entra ID application or service principal, the persistence technique Silk Typhoon uses to abuse OAuth applications and service principals holding administrative permissions. Adversaries append their own secrets to trusted applications to authenticate as the app and access mail, OneDrive, and SharePoint through MSGraph, so unexpected credential additions signal a supply-chain identity compromise.

Reporting behind it

Related detections9 linkedT1550.001 — drag to rearrange

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Suspicious browsercore Execution from Anomalous Parent for PRT Cookie (via process_creation)

Suspicious AWS Administrator Policy Attachment via CloudTrail (via aws)

Suspicious AWS SSO Account Role Enumeration via ListAccountRoles (via cloudtrail)

Suspicious AWS Inline Policy Granting Full S3 Access

Suspicious AWS Federated Console Login From Programmatic Credentials

Suspicious GCP Service Account Key Creation for Persistence (via gcp.audit)

Suspicious Device Registration Following OAuth Token Theft

Suspicious Credential Added to Application or Service Principal in Entra ID (via azure)

Pivot detection · T1550.001 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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