Possible CI Runner Memory Scraping via Python Process Memory Read (tj-actions Supply Chain)

ATT&CK techniques

Initial Access → Cred Access

Recon
Resource Dev
Initial Access
- T1195.002Compromise Software Supply Chain
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1552.001Credentials In Files
- T1552.004Private Keys
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a Python interpreter reading another process memory through /proc maps and mem, the technique the compromised tj-actions/changed-files GitHub Action used to dump CI runner memory. It is important because this behavior harvests secrets and tokens from the runner and leaks them into build logs.

Reporting behind it

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Possible CI Runner Memory Scraping via Python Process Memory Read (tj-actions Supply Chain)

Pivot detection · T1552.001 · 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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