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mukul975
cb8d79e068
- Add validated mitre_attack frontmatter to all 754 skills (286 distinct techniques), verified against MITRE ATT&CK v19.1 via the official mitreattack-python library: 0 revoked, deprecated, or invalid IDs - Curate precise per-skill technique IDs for forensics, malware-analysis, threat-intel, and red-team skills (e.g. DCSync -> T1003.006, Kerberoasting -> T1558.003, Pass-the-Ticket -> T1550.003) - Reconcile v19.1 tactic restructuring: Defense Evasion split into Stealth (TA0005) and Defense Impairment (TA0112); revoked T1562.* family and T1070.001/.002 remapped to active equivalents (T1685.*) - Normalize word-split tags across 35 skills (remove filename-derived stopword tags, add semantic cybersecurity tags) - Add api-reference.md for 3 skills that were missing it - Update README ATT&CK section with accurate v19.1 tactic distribution
80 lines
2.5 KiB
Markdown
80 lines
2.5 KiB
Markdown
---
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name: analyzing-web-server-logs-for-intrusion
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description: Parse Apache and Nginx access logs to detect SQL injection attempts,
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local file inclusion, directory traversal, web scanner fingerprints, and brute-force
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patterns. Uses regex-based pattern matching against OWASP attack signatures, GeoIP
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enrichment for source attribution, and statistical anomaly detection for request
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frequency and response size outliers.
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domain: cybersecurity
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subdomain: security-operations
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tags:
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- web-log-analysis
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- apache-logs
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- nginx-logs
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- sql-injection-detection
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- lfi-detection
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- directory-traversal
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- intrusion-detection
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version: '1.0'
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author: mahipal
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license: Apache-2.0
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nist_csf:
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- DE.CM-01
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- RS.MA-01
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- GV.OV-01
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- DE.AE-02
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mitre_attack:
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- T1190
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- T1059.007
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- T1110
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- T1595.002
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- T1505.003
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---
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# Analyzing Web Server Logs for Intrusion
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## When to Use
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- When investigating security incidents that require analyzing web server logs for intrusion
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- When building detection rules or threat hunting queries for this domain
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- When SOC analysts need structured procedures for this analysis type
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- When validating security monitoring coverage for related attack techniques
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## Prerequisites
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- Familiarity with security operations concepts and tools
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- Access to a test or lab environment for safe execution
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- Python 3.8+ with required dependencies installed
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- Appropriate authorization for any testing activities
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## Instructions
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1. Install dependencies: `pip install geoip2 user-agents`
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2. Collect web server access logs in Combined Log Format (Apache) or Nginx default format.
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3. Parse each log entry extracting: IP, timestamp, method, URI, status code, response size, user-agent, referer.
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4. Apply detection rules:
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- SQL injection: `UNION SELECT`, `OR 1=1`, `' OR '`, hex encoding patterns
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- LFI/Path traversal: `../`, `/etc/passwd`, `/proc/self`, `php://filter`
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- XSS: `<script>`, `javascript:`, `onerror=`, `onload=`
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- Scanner signatures: nikto, sqlmap, dirbuster, gobuster, wfuzz user-agents
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- Brute force: >50 POST requests to login endpoints from same IP in 5 minutes
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5. Enrich with GeoIP data and generate a prioritized findings report.
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```bash
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python scripts/agent.py --log-file /var/log/nginx/access.log --geoip-db GeoLite2-City.mmdb --output web_intrusion_report.json
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```
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## Examples
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### Detect SQLi in URI
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```
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192.168.1.100 - - [15/Jan/2024:10:30:45 +0000] "GET /products?id=1' UNION SELECT username,password FROM users-- HTTP/1.1" 200 4532
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```
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### Scanner User-Agent Detection
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```
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Nikto/2.1.6, sqlmap/1.7, DirBuster-1.0-RC1, gobuster/3.1.0
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```
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