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Cursor Fireworks Key Leak Trojan Build: Detection & IOCs

Attackers used a leaked Fireworks AI key to backdoor a Cursor marketplace extension: 20 IOCs, 9 detection rules and a free Splunk SPL rule.

Read the full threat intel for Cursor Fireworks Key Leak Trojan Build: Detection & IOCs →

Chapters

  1. 0:00The hookCursor VS Code supply-chain: 19 indicators.
  2. 0:05The storySome traces contained unredacted credentials.
  3. 0:11Attack pathFireworks exposes Cursor-issued access key.
  4. 0:25AttributionNo threat actor is attributed.
  5. 0:30Indicators of compromise19 indicators to hunt.
  6. 0:37MITRE ATT&CK techniques14 ATT&CK techniques are mapped.
  7. 0:42Remediation14 remediation steps are listed, 6 of them immediate.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00Cursor VS Code supply-chain: 19 indicators.

0:05Some traces contained unredacted credentials.

0:12Fireworks exposes Cursor-issued access key.

0:26No threat actor is attributed. Confidence: low.

0:3119 indicators to hunt.

0:3714 ATT&CK techniques are mapped.

0:4214 remediation steps are listed, 6 of them immediate.

0:509 detection rules, in SPL, KQL and Sigma.

0:56Threadlinqs. The unified security engineering platform.