hunting-for-process-injection-techniques

# Hunting for Process Injection Techniques ## Overview Process injection (MITRE ATT&CK T1055) allows adversaries to execute code in the address space of another process, enabling defense evasion and privilege escalation. This skill detects injection techniques via Sysmon Event ID 8 (CreateRemoteThread), Event ID 10 (ProcessAccess with suspicious access rights), and analysis of source-target process relationships to distinguish legitimate from malicious injection. ## When to Use - When investigating security incidents that require hunting for process injection techniques - When building detection rules or threat hunting queries for this domain - When SOC analysts need structured procedures for this analysis type - When validating security monitoring coverage for related attack techniques ## Prerequisites - Sysmon installed with Event IDs 8 and 10 enabled - Process creation logs (Sysmon Event ID 1 or Windows 4688) - Python 3.8+ with standard library - JSON-formatted Sysmon event logs ## Steps 1. **Parse Sysmon Events** — Ingest Event IDs 1, 8, and 10 from JSON log files 2. **Detect CreateRemoteThread** — Flag Event ID 8 with suspicious source-target process pairs 3. **Analyze ProcessAccess Rights** — Identify Event ID 10 with dangerous access masks (PROCESS_VM_WRITE, PROCESS_CREATE_THREAD) 4. **Build Process Relationship Graph** — Map source-to-target injection relationships 5. **Filter Known Legitimate Pairs** — Exclude known benign injection patterns (AV, debuggers, ...