Add 5 new cybersecurity skills: AFL++ fuzzing, Sysmon scheduled task detection, ModSecurity WAF logging, MITRE Navigator TTP analysis, PowerShell script block hunting

skills/analyzing-threat-actor-ttps-with-mitre-navigator/SKILL.md

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+---
+name: analyzing-threat-actor-ttps-with-mitre-navigator
+description: >
+  Map advanced persistent threat (APT) group tactics, techniques, and procedures (TTPs) to
+  the MITRE ATT&CK framework using the ATT&CK Navigator and attackcti Python library. The
+  analyst queries STIX/TAXII data for group-technique associations, generates Navigator layer
+  files for visualization, and compares defensive coverage against adversary profiles.
+  Activates for requests involving APT TTP mapping, ATT&CK Navigator layers, threat actor
+  profiling, or MITRE technique coverage analysis.
+domain: cybersecurity
+subdomain: threat-intelligence
+tags: [mitre-attack, navigator, threat-intelligence, apt, ttp-mapping, stix, attackcti]
+version: "1.0"
+author: mahipal
+license: Apache-2.0
+---
+# Analyzing Threat Actor TTPs with MITRE Navigator
+
+## Overview
+
+The MITRE ATT&CK Navigator is a web application for annotating and visualizing ATT&CK matrices.
+Combined with the attackcti Python library (which queries ATT&CK STIX data via TAXII), analysts
+can programmatically generate Navigator layer files mapping specific threat group TTPs, compare
+multiple groups, and assess detection coverage gaps against known adversaries.
+
+## Prerequisites
+
+- Python 3.8+ with attackcti and stix2 libraries installed
+- MITRE ATT&CK Navigator (web UI or local instance)
+- Understanding of STIX 2.1 objects and relationships
+
+## Steps
+
+1. Query ATT&CK STIX data for target threat group using attackcti
+2. Extract techniques associated with the group via STIX relationships
+3. Generate ATT&CK Navigator layer JSON with technique annotations
+4. Overlay detection coverage to identify gaps
+5. Export layer for team review and defensive planning
+
+## Expected Output
+
+```json
+{
+  "name": "APT29 TTPs",
+  "domain": "enterprise-attack",
+  "techniques": [
+    {"techniqueID": "T1566.001", "score": 1, "comment": "Spearphishing Attachment"},
+    {"techniqueID": "T1059.001", "score": 1, "comment": "PowerShell"}
+  ]
+}
+```