Agent skill

Triaging Security Alerts In Splunk

by mukul975 in mukul975/Anthropic-Cybersecurity-Skills

Triages security alerts in Splunk Enterprise Security by classifying severity, investigating notable events, correlating related telemetry, and making escalation or closure decisions using SPL…

Apache-2.0Auto-check passedSecurity

Install Triaging Security Alerts In Splunk

skills CLI
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill triaging-security-alerts-in-splunk -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills triaging-security-alerts-in-splunk --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/triaging-security-alerts-in-splunk .claude/skills/triaging-security-alerts-in-splunk && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
triaging-security-alerts-in-splunk
GitHub stars
34k
Token cost
~2.1k tokens
SKILL.md length
622 words
Files
4 (incl. scripts, references)
Skills in repo
644
Repo updated
First seen
Licence
Apache-2.0

At a glance

Triages security alerts in Splunk Enterprise Security by classifying severity, investigating notable events, correlating related telemetry, and making escalation or closure decisions using SPL…

  • Works in 7 steps: Access Incident Review and Prioritize… → Investigate the Notable Event Context → Correlate Across Data Sources → …
  • SOC analysts face queued alerts from correlation searches
  • SKILL.md covers When to Use, Prerequisites, Workflow and Key Concepts, plus 3 more sections
  • Runs Python scripts from its folder

What it does

Triaging Security Alerts In Splunk is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Triages security alerts in Splunk Enterprise Security by classifying severity, investigating notable events, correlating related telemetry, and making escalation or closure decisions using SPL queries and the Incident Review dashboard. Use when SOC analysts face queued alerts from correlation searches, need to prioritize investigation order, or must document triage decisions for handoff to Tier 2/3 analysts.

Its SKILL.md is about 2.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts and reference files (for example `references/api-reference.md` and `scripts/agent.py`).

It sits in Security. It works with Splunk. The repository describes itself as: 817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io…. The licence is Apache-2.0.

When your agent uses it

  • SOC analysts face queued alerts from correlation searches
  • Need to prioritize investigation order
  • Must document triage decisions for handoff to Tier 2/3 analysts

Example prompts

  • “Use the triaging-security-alerts-in-splunk skill to triage security alerts in Splunk Enterprise Security by classifying severity, investigating…”
  • “/triaging-security-alerts-in-splunk”

Requirements

  • Python 3

Workflow steps

7 steps, taken from the step headings in SKILL.md.

  1. Access Incident Review and Prioritize Queue
  2. Investigate the Notable Event Context
  3. Correlate Across Data Sources
  4. Check Threat Intelligence Enrichment
  5. Classify and Disposition the Alert
  6. Document Triage Findings
  7. Track Triage Metrics

What it can do on your machine

Read from SKILL.md and the folder at commit 54a7988. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Triaging Security Alerts In Splunk loads about 2.1k tokens when it runs, and up to ~2.6k if it reads all its reference files. Until then it costs about 112 tokens; SKILL.md has 622 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~112
When it runs · the whole SKILL.md, loaded when a task matches
~2.1k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from mukul975/Anthropic-Cybersecurity-Skills at commit 54a7988, republished under its Apache-2.0 licence (© mukul975). 622 words, ~2,100 tokens.

Download SKILL.mdSave it as .claude/skills/triaging-security-alerts-in-splunk/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
triaging-security-alerts-in-splunk
description
Triages security alerts in Splunk Enterprise Security by classifying severity, investigating notable events, correlating related telemetry, and making escalation or closure decisions using SPL queries and the Incident Review dashboard. Use when SOC analysts face queued alerts from correlation searches, need to prioritize investigation order, or must document triage decisions for handoff to Tier 2/3 analysts.
domain
cybersecurity
subdomain
soc-operations
tags
soc, splunk, alert-triage, siem, notable-events, correlation-search, incident-review
version
1.0
author
mahipal
license
Apache-2.0
nist_csf
DE.CM-01, DE.AE-02, RS.MA-01, DE.AE-06
mitre_attack
T1078, T1685.002, T1685.005, T1566

Triaging Security Alerts in Splunk

When to Use

Use this skill when:

  • SOC Tier 1 analysts need to process the Incident Review queue in Splunk Enterprise Security (ES)
  • Notable events require rapid severity classification and initial investigation before escalation
  • Alert volume exceeds capacity and analysts need a systematic triage methodology
  • Management requests metrics on alert disposition (true positive, false positive, benign)

Do not use for deep forensic investigation — escalate to Tier 2/3 after initial triage confirms malicious activity.

Prerequisites

  • Splunk Enterprise Security 7.x+ with Incident Review dashboard configured
  • CIM-normalized data sources (Windows Event Logs, firewall, proxy, endpoint)
  • Role with ess_analyst capability for notable event status updates
  • Familiarity with SPL (Search Processing Language)

Workflow

Step 1: Access Incident Review and Prioritize Queue

Open the Incident Review dashboard in Splunk ES. Sort notable events by urgency (calculated from severity x priority). Apply filters to focus on unassigned events:

spl
| `notable`
| search status="new" OR status="unassigned"
| sort - urgency
| table _time, rule_name, src, dest, user, urgency, status
| head 50

Focus on Critical and High urgency events first. Group related alerts by src or dest to identify attack chains rather than treating each alert independently.

Step 2: Investigate the Notable Event Context

For each notable event, pivot to raw events. Example for a brute force alert:

spl
index=wineventlog sourcetype="WinEventLog:Security" EventCode=4625
src_ip="192.168.1.105"
earliest=-1h latest=now
| stats count by src_ip, dest, user, status
| where count > 10
| sort - count

Check if the source IP is internal (lateral movement) or external (perimeter attack). Cross-reference with asset and identity lookups:

spl
| `notable`
| search rule_name="Brute Force Access Behavior Detected"
| lookup asset_lookup_by_cidr ip AS src OUTPUT category, owner, priority
| lookup identity_lookup_expanded identity AS user OUTPUT department, managedBy
| table _time, src, dest, user, category, owner, department
Step 3: Correlate Across Data Sources

Check if the same source appears in other telemetry:

spl
index=proxy OR index=firewall src="192.168.1.105" earliest=-24h
| stats count by index, sourcetype, action, dest_port
| sort - count

Look for corroborating evidence: Did the same IP also trigger DNS anomalies, proxy blocks, or endpoint detection alerts?

spl
index=main sourcetype="cisco:asa" src="192.168.1.105" action=blocked earliest=-24h
| timechart span=1h count by dest_port
Step 4: Check Threat Intelligence Enrichment

Query the threat intelligence framework for known IOCs:

spl
| `notable`
| search search_name="Threat - Threat Intelligence Match - Rule"
| lookup threat_intel_by_ip ip AS src OUTPUT threat_collection, threat_description, threat_key
| table _time, src, dest, threat_collection, threat_description, weight
| where weight >= 3

For domains, check against threat lists:

spl
| tstats count from datamodel=Web where Web.url="*evil-domain.com*" by Web.src, Web.url, Web.status
| rename Web.* AS *
Step 5: Classify and Disposition the Alert

Update the notable event status in Incident Review:

DispositionCriteriaAction
True PositiveCorroborating evidence confirms malicious activityEscalate to Tier 2, create incident ticket
Benign True PositiveAlert fired correctly but activity is authorized (e.g., pen test)Close with comment, add suppression if recurring
False PositiveAlert logic matched benign behaviorClose, tune correlation search, document pattern
UndeterminedInsufficient data to classifyAssign to Tier 2 with investigation notes

Update via Splunk ES UI or REST API:

spl
| sendalert update_notable_event param.status="2" param.urgency="critical"
  param.comment="Confirmed brute force from compromised workstation. Escalated to IR-2024-0431."
  param.owner="analyst_jdoe"
Step 6: Document Triage Findings

Record in the notable event comment field:

  • Source/destination involved
  • Data sources examined
  • Correlation findings (related alerts, TI matches)
  • Disposition rationale
  • Next steps for escalation
spl
| `notable`
| search rule_name="Brute Force*" status="closed"
| stats count by status_label, disposition
| addtotal
Show full SKILL.md (244 more words)Show less
Step 7: Track Triage Metrics

Monitor triage performance over time:

spl
| `notable`
| where status_end > 0
| eval triage_time = status_end - _time
| stats avg(triage_time) AS avg_triage_sec, median(triage_time) AS med_triage_sec,
        count by rule_name, status_label
| eval avg_triage_min = round(avg_triage_sec/60, 1)
| sort - count
| table rule_name, status_label, count, avg_triage_min

Key Concepts

TermDefinition
Notable EventSplunk ES alert generated by a correlation search that meets defined risk or threshold criteria
UrgencyCalculated field combining event severity with asset/identity priority (Critical/High/Medium/Low/Informational)
Correlation SearchScheduled SPL query that detects threat patterns and generates notable events when conditions match
CIMCommon Information Model — Splunk's normalized field naming convention enabling cross-source queries
DispositionFinal classification of an alert: true positive, false positive, benign true positive, or undetermined
MTTD/MTTRMean Time to Detect / Mean Time to Respond — key SOC metrics measuring detection and resolution speed

Tools & Systems

  • Splunk Enterprise Security: SIEM platform providing Incident Review dashboard, correlation searches, and risk-based alerting
  • Splunk SOAR (Phantom): Orchestration platform for automating triage playbooks and enrichment actions
  • Asset & Identity Framework: Splunk ES lookup tables mapping IPs to asset owners and users to departments for context enrichment
  • Threat Intelligence Framework: Splunk ES module ingesting STIX/TAXII feeds and matching IOCs against notable events

Common Scenarios

  • Brute Force Alerts: Correlate EventCode 4625 (failed logon) with 4624 (successful logon) from same source to determine if attack succeeded
  • Malware Detection: Cross-reference endpoint AV alert with proxy logs for C2 callback confirmation
  • Data Exfiltration Alert: Check outbound data volume from DLP and proxy logs against user baseline
  • Privilege Escalation: Correlate EventCode 4672 (special privileges assigned) with 4720 (account created) from non-admin users
  • Lateral Movement: Map EventCode 4648 (explicit credential logon) across multiple destinations from single source

Output Format

TRIAGE REPORT — Notable Event #NE-2024-08921
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Alert:        Brute Force Access Behavior Detected
Time:         2024-03-15 14:23:07 UTC
Source:       192.168.1.105 (WORKSTATION-042, Finance Dept)
Destination:  10.0.5.20 (DC-PRIMARY, Domain Controller)
User:         jsmith (Finance Analyst)

Investigation:
  - 847 failed logons (4625) in 12 minutes from src
  - Successful logon (4624) at 14:35:02 after brute force
  - No proxy/DNS anomalies from src in prior 24h
  - Source not on threat intel lists

Disposition:  TRUE POSITIVE — Compromised credential
Action:       Escalated to Tier 2, ticket IR-2024-0431 created
              Account jsmith disabled pending password reset

© mukul975, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (scripts, references) in skills/triaging-security-alerts-in-splunk of mukul975/Anthropic-Cybersecurity-Skills.

  • SKILL.md
  • LICENSE
  • references/api-reference.md
  • scripts/agent.py

Open the folder on GitHubat commit 54a7988

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Siem Detectionbriiirussell/cybersecurity-skills413—~2.6kAutomated safety check: NotesMIT
Doca ArgusNVIDIA/skills3.6k—~4.8kAutomated safety check: PassApache-2.0
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Siem Loggingancoleman/ai-design-components525—~3.4kAutomated safety check: PassMIT

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Works with

Categories

Questions about Triaging Security Alerts In Splunk

What does Triaging Security Alerts In Splunk do?

Triages security alerts in Splunk Enterprise Security by classifying severity, investigating notable events, correlating related telemetry, and making escalation or closure decisions using SPL…. Triaging Security Alerts In Splunk is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Triages security alerts in Splunk Enterprise Security by classifying severity, investigating notable events, correlating related telemetry, and making escalation or closure decisions using SPL queries and the Incident Review dashboard.

When should I use Triaging Security Alerts In Splunk?

Triaging Security Alerts In Splunk fits situations like: SOC analysts face queued alerts from correlation searches; need to prioritize investigation order; must document triage decisions for handoff to Tier 2/3 analysts.

How do I install Triaging Security Alerts In Splunk in Claude Code?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill triaging-security-alerts-in-splunk -a claude-code`. Or copy the skill folder (skills/triaging-security-alerts-in-splunk in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/triaging-security-alerts-in-splunk in your project. Claude Code loads it when a task matches its description.

How do I install Triaging Security Alerts In Splunk in Codex?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill triaging-security-alerts-in-splunk -a codex`. Or copy the skill folder (skills/triaging-security-alerts-in-splunk in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/triaging-security-alerts-in-splunk in your project. Codex loads it when a task matches its description.

Can I use Triaging Security Alerts In Splunk in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill triaging-security-alerts-in-splunk -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/triaging-security-alerts-in-splunk, .gemini/skills/triaging-security-alerts-in-splunk, .github/skills/triaging-security-alerts-in-splunk and .opencode/skills/triaging-security-alerts-in-splunk in your project.

What does Triaging Security Alerts In Splunk need to run?

Going by SKILL.md and its folder, Triaging Security Alerts In Splunk needs Python for the scripts in its folder. Our summary lists: Python 3.

Does Triaging Security Alerts In Splunk access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Triaging Security Alerts In Splunk safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Triaging Security Alerts In Splunk use?

Triaging Security Alerts In Splunk is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Triaging Security Alerts In Splunk use?

About 2.1k tokens (SKILL.md is roughly 8.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 535 tokens, read only when the agent opens those files.

What are the alternatives to Triaging Security Alerts In Splunk?

Skills that share tags, products or a category with Triaging Security Alerts In Splunk: Detection Sigma (AgentSecOps/SecOpsAgentKit, 220 stars), Siem Detection (briiirussell/cybersecurity-skills, 413 stars), Doca Argus (NVIDIA/skills, 3.6k stars) and Hunting Threats (trilwu/secskills, 157 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Triaging Security Alerts In Splunk?

mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 34,116 GitHub stars. The repository holds 644 skills in this directory. The repository was last updated on August 31, 2026.

Source: mukul975/Anthropic-Cybersecurity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.