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metadata
license: cc-by-4.0
pretty_name: Security Log Samples (malicious and benign, 50+ formats)
language:
  - en
tags:
  - cybersecurity
  - security
  - logs
  - log-analysis
  - threat-detection
  - detection-engineering
  - sigma
  - siem
task_categories:
  - text-classification
size_categories:
  - n<1K
configs:
  - config_name: manifest
    data_files: manifest.csv

Security log samples

Paired malicious and benign sample logs for more than 50 security log formats, for testing log parsers, detection rules and analytics, plus the monthly data behind two LogTriage research reports. Published by LogTriage; the same files are on GitHub. Licensed CC BY 4.0.

Each attack sample has a benign counterpart from the same source, so a rule can be checked both ways: it must fire on the first and stay silent on the second. Public IP addresses are replaced with documentation ranges (RFC 5737). manifest.csv (shown in the viewer above) lists every file with its format, label (malicious / benign), size, line count, SHA-256 and the LogTriage Sigma rules validated against it.

Monthly research data

Path What it is Report
reports/server-attacks/<YYYY-MM>.json What attacked an ordinary internet-facing server that month: SSH and web attack volumes, the most requested probe paths, scanner user agents, attacking networks and countries. Aggregates only, never an IP address. What attacks an internet-facing server
reports/ip-blocklists/<YYYY-MM>.json How much of that month's real attack traffic each of 17 free IP blocklists would have caught, alone and in combination. Aggregates only. Which free IP blocklists work

Field-by-field guides to the formats are in the log format reference; the free log analyzer reads every format here in the browser.