---
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](https://logtriage.app); the same files are on
[GitHub](https://github.com/logtriage-cyber/security-log-samples). 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](https://github.com/logtriage-cyber/logtriage-detection-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](https://logtriage.app/reports/server-attacks/) |
| `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](https://logtriage.app/reports/ip-blocklists/) |

Field-by-field guides to the formats are in the [log format reference](https://logtriage.app/reference/log-formats/);
the [free log analyzer](https://logtriage.app/tools/log-analyzer/) reads every format here in the browser.