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Agent skill

Implementing Siem Correlation Rules For Apt

by mukul975 in mukul975/Anthropic-Cybersecurity-Skills

Write multi-event correlation rules in Splunk SPL and Sigma format that detect APT lateral movement by chaining Windows authentication events (4624, 4648), process execution (4688, Sysmon Event 1)…

Apache-2.0Auto-check passedSecurity

Install Implementing Siem Correlation Rules For Apt

skills CLI
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-siem-correlation-rules-for-apt -a claude-code

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

GitHub CLI
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-siem-correlation-rules-for-apt --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/implementing-siem-correlation-rules-for-apt .claude/skills/implementing-siem-correlation-rules-for-apt && 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
implementing-siem-correlation-rules-for-apt
GitHub stars
34k
Token cost
~784 tokens
SKILL.md length
210 words
Files
4 (incl. scripts, references)
Skills in repo
637
Repo updated
First seen
Licence
Apache-2.0

At a glance

Write multi-event correlation rules in Splunk SPL and Sigma format that detect APT lateral movement by chaining Windows authentication events (4624, 4648), process execution (4688, Sysmon Event 1)…

  • Works in 6 steps: Install dependencies: pip install… → Connect to the Splunk REST API and… → Build Sigma rules in YAML that express… → …
  • Building SIEM correlation searches to surface multi-stage attack sequences that single-event detections miss
  • SKILL.md covers When to Use, Prerequisites, Instructions and Examples
  • Runs Python scripts from its folder; calls python and pip

What it does

Implementing Siem Correlation Rules For Apt is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Write multi-event correlation rules in Splunk SPL and Sigma format that detect APT lateral movement by chaining Windows authentication events (4624, 4648), process execution (4688, Sysmon Event 1), and network connections (Sysmon Event 3) across hosts within sliding time windows. Use when building SIEM correlation searches to surface multi-stage attack sequences that single-event detections miss, such as pass-the-hash or lateral movement chains.

Its SKILL.md is about 780 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, covering Security operations and Red teaming and adversary simulation. 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

  • Building SIEM correlation searches to surface multi-stage attack sequences that single-event detections miss
  • Such as pass-the-hash
  • Lateral movement chains

Example prompts

  • “/implementing-siem-correlation-rules-for-apt”

Requirements

  • Python 3

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Install dependencies: pip install requests pyyaml sigma-cli
  2. Connect to the Splunk REST API and define correlation searches that chain multiple event types across hosts.
  3. Build Sigma rules in YAML that express multi-step detection logic for lateral movement patterns
  4. Convert Sigma rules to Splunk SPL using sigma-cli convert.
  5. Deploy correlation searches to Splunk ES via the REST API.
  6. Run the agent to generate and install correlation rules, then audit existing rules for coverage gaps.

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.

    Shell commands in SKILL.md call:

    • python
    • pip

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

  • Network

    No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.

    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

Implementing Siem Correlation Rules For Apt loads about 784 tokens when it runs, and up to ~1.2k if it reads all its reference files. Until then it costs about 123 tokens; SKILL.md has 210 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~123
When it runs · the whole SKILL.md, loaded when a task matches
~784
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.2k

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). 210 words, ~784 tokens.

Download SKILL.mdSave it as .claude/skills/implementing-siem-correlation-rules-for-apt/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
implementing-siem-correlation-rules-for-apt
description
Write multi-event correlation rules in Splunk SPL and Sigma format that detect APT lateral movement by chaining Windows authentication events (4624, 4648), process execution (4688, Sysmon Event 1), and network connections (Sysmon Event 3) across hosts within sliding time windows. Use when building SIEM correlation searches to surface multi-stage attack sequences that single-event detections miss, such as pass-the-hash or lateral movement chains.
domain
cybersecurity
subdomain
security-operations
tags
siem, correlation-rules, apt-detection, lateral-movement, windows-event-logs, security-operations
version
1.0
author
mahipal
license
Apache-2.0
nist_csf
DE.CM-01, RS.MA-01, GV.OV-01, DE.AE-02
mitre_attack
T1078, T1190, T1059, T1021, T1550

Implementing SIEM Correlation Rules for APT

When to Use

  • When deploying or configuring implementing siem correlation rules for apt capabilities in your environment
  • When establishing security controls aligned to compliance requirements
  • When building or improving security architecture for this domain
  • When conducting security assessments that require this implementation

Prerequisites

  • Familiarity with security operations concepts and tools
  • Access to a test or lab environment for safe execution
  • Python 3.8+ with required dependencies installed
  • Appropriate authorization for any testing activities

Instructions

  1. Install dependencies: pip install requests pyyaml sigma-cli
  2. Connect to the Splunk REST API and define correlation searches that chain multiple event types across hosts.
  3. Build Sigma rules in YAML that express multi-step detection logic for lateral movement patterns:
    • RDP logon (4624 LogonType=10) followed by service installation (7045) on same target within 15 minutes
    • Pass-the-Hash: NTLM logon (4624 LogonType=3) followed by process creation (4688) of admin tools
    • PsExec-style: Named pipe creation (Sysmon 17/18) correlated with remote service creation (7045)
  4. Convert Sigma rules to Splunk SPL using sigma-cli convert.
  5. Deploy correlation searches to Splunk ES via the REST API.
  6. Run the agent to generate and install correlation rules, then audit existing rules for coverage gaps.
bash
python scripts/agent.py --splunk-url https://localhost:8089 --username admin --password changeme --output correlation_report.json

Examples

Detect RDP Lateral Movement Chain
index=wineventlog (EventCode=4624 Logon_Type=10) OR (EventCode=7045)
| transaction Computer maxspan=15m startswith=(EventCode=4624) endswith=(EventCode=7045)
| where eventcount >= 2
| table _time Computer Account_Name ServiceName
Sigma Rule for PsExec Lateral Movement
yaml
title: PsExec Lateral Movement Detection
logsource:
  product: windows
  service: sysmon
detection:
  pipe_created:
    EventID: 17
    PipeName|startswith: '\PSEXESVC'
  service_installed:
    EventID: 7045
    ServiceFileName|contains: 'PSEXESVC'
  timeframe: 5m
  condition: pipe_created | near service_installed
level: high

© 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/implementing-siem-correlation-rules-for-apt of mukul975/Anthropic-Cybersecurity-Skills.

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

Open the folder on GitHubat commit 54a7988

Compare with similar skills

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SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Implementing Siem Correlation Rules For Apt this skillmukul975/Anthropic-Cybersecurity-Skills34k—~784Automated safety check: PassApache-2.0
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Cybersecurityohmyjahh/xquads-squads276—~895Automated safety check: PassMIT
Rational Red Blue Debatedigoal/blog8.6k—~2.2kAutomated safety check: PassGPL-2.0
Detection SigmaAgentSecOps/SecOpsAgentKit2201 repos~4kAutomated safety check: PassCustom licence
Threat Huntinghypnguyen1209/offensive-claude386—~2.4kAutomated safety check: PassMIT

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Works with

Categories

Questions about Implementing Siem Correlation Rules For Apt

What does Implementing Siem Correlation Rules For Apt do?

Write multi-event correlation rules in Splunk SPL and Sigma format that detect APT lateral movement by chaining Windows authentication events (4624, 4648), process execution (4688, Sysmon Event 1)…. Implementing Siem Correlation Rules For Apt is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Write multi-event correlation rules in Splunk SPL and Sigma format that detect APT lateral movement by chaining Windows authentication events (4624, 4648), process execution (4688, Sysmon Event 1), and network connections (Sysmon Event 3) across hosts within sliding time windows.

When should I use Implementing Siem Correlation Rules For Apt?

Implementing Siem Correlation Rules For Apt fits situations like: building SIEM correlation searches to surface multi-stage attack sequences that single-event detections miss; such as pass-the-hash; lateral movement chains.

How do I install Implementing Siem Correlation Rules For Apt in Claude Code?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-siem-correlation-rules-for-apt -a claude-code`. Or copy the skill folder (skills/implementing-siem-correlation-rules-for-apt in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/implementing-siem-correlation-rules-for-apt in your project. Claude Code loads it when a task matches its description.

How do I install Implementing Siem Correlation Rules For Apt in Codex?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-siem-correlation-rules-for-apt -a codex`. Or copy the skill folder (skills/implementing-siem-correlation-rules-for-apt in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/implementing-siem-correlation-rules-for-apt in your project. Codex loads it when a task matches its description.

Can I use Implementing Siem Correlation Rules For Apt 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 implementing-siem-correlation-rules-for-apt -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/implementing-siem-correlation-rules-for-apt, .gemini/skills/implementing-siem-correlation-rules-for-apt, .github/skills/implementing-siem-correlation-rules-for-apt and .opencode/skills/implementing-siem-correlation-rules-for-apt in your project.

What does Implementing Siem Correlation Rules For Apt need to run?

Going by SKILL.md and its folder, Implementing Siem Correlation Rules For Apt needs Python for the scripts in its folder and the command-line tools its instructions call (python and pip). Our summary lists: Python 3.

Does Implementing Siem Correlation Rules For Apt access the network?

SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Implementing Siem Correlation Rules For Apt 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 Implementing Siem Correlation Rules For Apt use?

Implementing Siem Correlation Rules For Apt 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 Implementing Siem Correlation Rules For Apt use?

About 784 tokens (SKILL.md is roughly 3.1k 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 429 tokens, read only when the agent opens those files.

What are the alternatives to Implementing Siem Correlation Rules For Apt?

Skills that share tags, products or a category with Implementing Siem Correlation Rules For Apt: Council (warpdotdev/common-skills, 608 stars), Cybersecurity (ohmyjahh/xquads-squads, 276 stars), Rational Red Blue Debate (digoal/blog, 8.6k stars) and Detection Sigma (AgentSecOps/SecOpsAgentKit, 220 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Implementing Siem Correlation Rules For Apt?

mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 33,922 GitHub stars. The repository holds 637 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.