Suricata IDS Monitor

Read and triage Suricata IDS/IPS alerts from eve.json into a structured threat report — severity-ranked findings, attacker IPs, top triggered signatures, and recommended blocks. Use when you want an automated threat intelligence snapshot from your Suricata deployment, after a scan triggers alerts, or as a daily security briefing module. No external API. Reads your local Suricata log only.

Suricata Monitor

Turns raw Suricata eve.json alerts into an actionable threat report.

Reads your local Suricata log, ranks findings by severity, surfaces attacker IPs and top signatures, and delivers a structured brief you can act on or forward to Telegram.

Privacy: Reads /var/log/suricata/eve.json only. No data leaves your machine. Single SKILL.md — inspect every line here.

---

Prerequisites

Suricata must be running and writing to eve.json:

bash

# Verify log exists and is being written
ls -lh /var/log/suricata/eve.json
tail -5 /var/log/suricata/eve.json | python3 -m json.tool

If the log is permission-denied:

bash

sudo chmod 644 /var/log/suricata/eve.json

---

Workflow

1. Read recent alerts

python

import json
from datetime import datetime, timedelta

LOG = "/var/log/suricata/eve.json"
HOURS = 24  # look back window

cutoff = (datetime.now() - timedelta(hours=HOURS)).timestamp()
alerts = []

with open(LOG) as f:
    for line in f:
        try:
            event = json.loads(line)
            if event.get("event_type") != "alert":
                continue
            ts = datetime.fromisoformat(event["timestamp"][:19]).timestamp()
            if ts < cutoff:
                continue
            alerts.append({
                "time":      event["timestamp"][:19],
                "severity":  event["alert"].get("severity", 99),
                "sig":       event["alert"].get("signature", "unknown"),
                "category":  event["alert"].get("category", ""),
                "src_ip":    event.get("src_ip", "?"),
                "dest_ip":   event.get("dest_ip", "?"),
                "dest_port": event.get("dest_port", "?"),
                "proto":     event.get("proto", "?"),
            })
        except (json.JSONDecodeError, KeyError, ValueError):
            continue

2. Aggregate and rank

python

from collections import Counter

# Top attacker IPs
attacker_ips = Counter(a["src_ip"] for a in alerts if a["severity"] <= 2)

# Top signatures
top_sigs = Counter(a["sig"] for a in alerts).most_common(5)

# By severity
critical = [a for a in alerts if a["severity"] == 1]
high     = [a for a in alerts if a["severity"] == 2]
medium   = [a for a in alerts if a["severity"] == 3]
low      = [a for a in alerts if a["severity"] >= 4]

3. Format the report

text

SURICATA THREAT REPORT — YYYY-MM-DD HH:MM  (last Nh)
Alerts: X total  |  Critical: X  High: X  Medium: X  Low: X

TOP ATTACKER IPs
  1. [ip]  — X hits  (Block: sudo ufw deny from [ip])
  2. ...

TOP SIGNATURES
  1. [signature name]  — X times
  2. ...

CRITICAL ALERTS (severity 1)
  [HH:MM] [src_ip] → [dest_ip]:[port]  [signature]

HIGH ALERTS (severity 2) — sample
  [HH:MM] [src_ip] → [dest_ip]:[port]  [signature]

RECOMMENDED ACTIONS
  [ ] Block top attacker IPs:
      sudo ufw deny from [ip1]
      sudo ufw deny from [ip2]
  [ ] Review Suricata rule for: [top signature]
  [ ] If RED posture: run eva-security-audit skill

STATUS: [GREEN/YELLOW/RED]
  GREEN  = 0 critical, <10 high in 24h
  YELLOW = 1–5 critical OR 10–50 high
  RED    = >5 critical OR >50 high OR C2/exploit signatures detected

4. Deliver

To Telegram (use telegram-notifier skill):

python

# After building the report string above:
import os, requests
requests.post(
    f"https://api.telegram.org/bot{os.environ['TELEGRAM_BOT_TOKEN']}/sendMessage",
    json={"chat_id": os.environ['TELEGRAM_CHAT_ID'], "text": report},
    timeout=10
)

To memory:

bash

echo "[report]" >> memory/$(date +%Y-%m-%d).md

---

Schedule daily monitoring

bash

openclaw cron add \
  --name "suricata-monitor:daily" \
  --cron "0 7 * * *" \
  --prompt "Run the suricata-monitor skill. Look back 24 hours. Send report to Telegram and append to today's memory file."

---

Signature categories to watch

Category	Severity	Action
Exploit kit activity	1	Block IP immediately
Malware C2	1	Isolate affected host
Port scanning	2	Monitor, consider block
Policy violation	3	Review, log
Informational	4+	Log only

---

Quick commands

bash

# Count today's alerts by severity
cat /var/log/suricata/eve.json | python3 -c "
import sys, json
from collections import Counter
sev = Counter()
for line in sys.stdin:
    try:
        e = json.loads(line)
        if e.get('event_type') == 'alert':
            sev[e['alert'].get('severity','?')] += 1
    except: pass
for k,v in sorted(sev.items()): print(f'Severity {k}: {v}')
"

# Top 10 attacker IPs last 24h
cat /var/log/suricata/eve.json | python3 -c "
import sys, json
from collections import Counter
from datetime import datetime, timedelta
cutoff = (datetime.now()-timedelta(hours=24)).timestamp()
ips = []
for line in sys.stdin:
    try:
        e = json.loads(line)
        if e.get('event_type')=='alert':
            ts = datetime.fromisoformat(e['timestamp'][:19]).timestamp()
            if ts > cutoff: ips.append(e.get('src_ip','?'))
    except: pass
for ip,n in Counter(ips).most_common(10): print(f'{n:5}  {ip}')
"