Possible Yellowfin BI JWT Forgery via refresh-tokens Endpoint
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-06-08
- Updated
- 2026-08-28
ATT&CK techniques
Initial Access → ExecutionRecon
Resource Dev
Initial Access
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects HTTP requests to the Yellowfin BI /api/refresh-tokens endpoint associated with forged JWT abuse. Assetnote used hardcoded signing keys to mint tokens against this API before triggering JNDI-injection remote code execution, so anomalous access here can indicate exploitation.
Reporting behind it
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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