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Kerkoporta Coding Agent Backdoor: Detection & IOCs

A poisoned dataset or checkpoint can make a coding agent run commands on trigger: 9 detection rules, 11 IOCs, 12 ATT&CK techniques and a free Splunk SPL rule.

Read the full threat intel for Kerkoporta Coding Agent Backdoor: Detection & IOCs →

Chapters

  1. 0:00The hookAbout 1% poisoned rows: 78% success.
  2. 0:05The storyMicrosoft researchers reproduced two proof-of-concept backdoors.
  3. 0:12Attack pathCrafted rows reach a public dataset.
  4. 0:27AttributionNo threat actor: this was defensive research.
  5. 0:31Indicators of compromise3 indicators to hunt: 3 package names.
  6. 0:37MITRE ATT&CK techniques9 ATT&CK techniques, from resource development to impact.
  7. 0:42Remediation3 steps now: Inventory fine-tuned models and third-party open-weight checkpoints used by coding.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00About 1% poisoned rows: 78% success.

0:05Microsoft researchers reproduced two proof-of-concept backdoors.

0:09Dormant until a trigger appears.

0:13Crafted rows reach a public dataset.

0:15A team fine-tunes on it.

0:17Deployed, it waits for a trigger.

0:19Then an unrelated tool call fires.

0:22It fetches remote code and reads files.

0:27No threat actor: this was defensive research.

0:323 indicators to hunt: 3 package names.

0:389 ATT&CK techniques, from resource development to impact.

0:423 steps now: Inventory fine-tuned models and third-party open-weight checkpoints used by coding.

0:519 detection rules, in SPL, KQL and Sigma.

0:56Threadlinqs. The unified security engineering platform.