IoM Operational Security (OPSEC) advisor. An agent skill from chainreactors/malice-network.

Apache-2.0Auto-check passedSecurity

Install Iom Opsec

skills CLI
$ npx skills add chainreactors/malice-network --skill iom-opsec -a claude-code

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

GitHub CLI
$ gh skill install chainreactors/malice-network iom-opsec --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/chainreactors/malice-network.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/iom-opsec .claude/skills/iom-opsec && 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
iom-opsec
GitHub stars
500
Token cost
~1.4k tokens
SKILL.md length
580 words
Files
3
Skills in repo
2
Repo updated
First seen
Licence
Apache-2.0

At a glance

IoM Operational Security (OPSEC) advisor. An agent skill from chainreactors/malice-network.

  • Works in 4 steps: Identify the security products in the… → Search the case library for -.md → If a matching case exists, cite the… → …
  • Conditions: use when the user asks is this safe?
  • SKILL.md covers Methodology: Five Questions…, HITL Decision Framework, Case Library and References
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Iom Opsec is an agent skill from chainreactors/malice-network. IoM Operational Security (OPSEC) advisor. Provides OPSEC methodology guidance, helps users understand operational risks, build secure operating habits, and accumulate experience through a case library. Does not execute commands directly; serves as decision support. Concrete technical specifications and OPSEC scoring are maintained in the iom-pentest skill. Trigger conditions: use when the user asks "is this safe?", "will this be detected?", "how should I think about OPSEC?", "risk assessment", "operational…

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files (for example `reference/case-template.md` and `reference/cases/cred-dump-defender.md`).

It sits in Security, covering Penetration testing. The repository describes itself as: Next Generation C2 Framework, IoM-server/client. The licence is Apache-2.0.

When your agent uses it

  • Conditions: use when the user asks is this safe?
  • Will this be detected?
  • How should I think about OPSEC?
  • Risk assessment

Example prompts

  • “is this safe?”
  • “will this be detected?”
  • “how should I think about OPSEC?”
  • “/iom-opsec”

Workflow steps

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

  1. Identify the security products in the target environment
  2. Search the case library for -.md
  3. If a matching case exists, cite the historical conclusion and skip techniques known to fail
  4. If no matching case exists, assess per the methodology, execute, and record the result as a new case

What it can do on your machine

Read from SKILL.md and the folder at commit 6c0e358. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Iom Opsec loads about 1.4k tokens when it runs. Until then it costs about 146 tokens; SKILL.md has 580 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~146
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k

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); files beside SKILL.md are not scanned.

SKILL.md

The full file from chainreactors/malice-network at commit 6c0e358, republished under its Apache-2.0 licence (© chainreactors). 580 words, ~1,414 tokens.

Download SKILL.mdSave it as .claude/skills/iom-opsec/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
iom-opsec
description
IoM Operational Security (OPSEC) advisor. Provides OPSEC methodology guidance, helps users understand operational risks, build secure operating habits, and accumulate experience through a case library. Does not execute commands directly; serves as decision support. Concrete technical specifications and OPSEC scoring are maintained in the iom-pentest skill. Trigger conditions: use when the user asks "is this safe?", "will this be detected?", "how should I think about OPSEC?", "risk assessment", "operational security advice", or "help me analyze the detection surface".

IoM OPSEC Advisor

Provides operational security methodology guidance. Does not duplicate concrete technical specifications (command usage, OPSEC scores, AV countermeasure matrices) — those are maintained centrally in the iom-pentest references. This skill focuses on mindset and decision frameworks.

Methodology: Five Questions Before Every Operation

Answer these five questions before executing any operation:

1. Do I know what is on the other side? Do not execute any risky operation without first running enum av / ps. Operating blind is the number-one OPSEC killer.

2. What is the detection surface of this operation? Every operation has a detection surface. Understanding it is the prerequisite for assessing risk:

Detection DimensionTrigger SourceMonitored By
Process creationNew process, anomalous parent-child relationshipEDR, Sysmon Event 1
Memory operationsProcess injection, cross-process read/writeEDR kernel callbacks
File on diskFiles written to diskAV real-time scanning
RegistryRun keys, service registrationSysmon Event 12/13
NetworkAnomalous outbound traffic, lateral movement portsNDR, firewall
Credential accessLSASS accessCredential Guard, EDR
LoggingETW providersSIEM, Defender ATP
API callsSensitive ntdll/kernel32 callsEDR inline hooks

3. Is there an alternative with a smaller detection surface? Almost always yes. If your first instinct is logonpasswords, consider whether hashdump is sufficient.

4. What if it fails? Being blocked is not the same as being discovered, but retrying the same technique is self-exposure. Plan a fallback path.

5. Is this step actually necessary? If you can skip it, skip it. Every operation carries risk.

HITL Decision Framework

Triage user-requested operations by severity level:

Green Light (execute directly, inform the user)

  • Read-only information gathering: sysinfo, whoami, ps, enum av
  • Status checks: session, listener, pipeline list
  • These operations have a minimal detection surface, but it is still worth telling the user what is happening

Yellow Light (present options, wait for confirmation)

  • Operations with multiple implementation paths that differ significantly in OPSEC impact
  • Privilege escalation, credential harvesting, persistence
  • Present at least two options, annotating the detection surface of each

Red Light (strong warning, explicit confirmation required)

  • Operations with an OPSEC score < 6
  • Techniques known to be blocked by the current AV (per the case library)
  • Operations that may destabilize the system (kernel exploits)
  • Clearly state the risk, recommend alternatives, and wait for the user to explicitly confirm
Show full SKILL.md (207 more words)Show less

Case Library

The case library is the core of experience accumulation. Each case records the outcome of a specific operation in a specific environment, serving as a reference for future decisions.

Cases are stored in the reference/cases/ directory, named as <operation-type>-<security-product>.md. See reference/case-template.md for the case format.

Using Cases

When a user requests an operation:

  1. Identify the security products in the target environment
  2. Search the case library for <operation-type>-<security-product>.md
  3. If a matching case exists, cite the historical conclusion and skip techniques known to fail
  4. If no matching case exists, assess per the methodology, execute, and record the result as a new case
Iteration Mechanism

Cases feed back into the iom-pentest references:

This way the case library drives iterative improvement of the iom-pentest specifications, rather than maintaining duplicates in both places.

References

ContentLocation
Case templatereference/case-template.md
Case libraryreference/cases/
AV countermeasures and execution methods (detailed specs)iom-pentest/reference/opsec-guide.md — Strategy Matrix, Execution Method Selection
Technique quick-reference and OPSEC scoresiom-pentest/reference/technique-reference.md — Credential Harvesting, UAC Bypass

© chainreactors, 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 2 other files in skills/iom-opsec of chainreactors/malice-network.

  • SKILL.md
  • reference/case-template.md
  • reference/cases/cred-dump-defender.md

Open the folder on GitHubat commit 6c0e358

Compare with similar skills

Iom Opsec next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Iom Opsec compared with similar skills
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Iom Opsec this skillchainreactors/malice-network500—~1.4kAutomated safety check: PassApache-2.0
Strix Code Vulnerability Scanusestrix/strix67k—~1.1kAutomated safety check: PassApache-2.0
Code Audit3stoneBrother/code-audit8931 repos~2.7kAutomated safety check: PassNone
Fix Strix Security Findingsusestrix/strix67k—~1.5kAutomated safety check: PassApache-2.0
Metabigor OSINT Reconj3ssie/metabigor1.9k—~2.4kAutomated safety check: PassMIT
Wooyun Legacytanweai/wooyun-legacy1.8k—~1.9kAutomated safety check: PassCustom licence

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Categories

Questions about Iom Opsec

What does Iom Opsec do?

IoM Operational Security (OPSEC) advisor. An agent skill from chainreactors/malice-network. Iom Opsec is an agent skill from chainreactors/malice-network. IoM Operational Security (OPSEC) advisor.

When should I use Iom Opsec?

Iom Opsec fits situations like: conditions: use when the user asks is this safe?; will this be detected?; how should I think about OPSEC?; risk assessment.

How do I install Iom Opsec in Claude Code?

Run `npx skills add chainreactors/malice-network --skill iom-opsec -a claude-code`. Or copy the skill folder (skills/iom-opsec in chainreactors/malice-network) into .claude/skills/iom-opsec in your project. Claude Code loads it when a task matches its description.

How do I install Iom Opsec in Codex?

Run `npx skills add chainreactors/malice-network --skill iom-opsec -a codex`. Or copy the skill folder (skills/iom-opsec in chainreactors/malice-network) into .agents/skills/iom-opsec in your project. Codex loads it when a task matches its description.

Can I use Iom Opsec 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 chainreactors/malice-network --skill iom-opsec -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/iom-opsec, .gemini/skills/iom-opsec, .github/skills/iom-opsec and .opencode/skills/iom-opsec in your project.

What does Iom Opsec need to run?

SKILL.md names no scripts, command-line tools or credentials: Iom Opsec is instructions for the agent only.

Does Iom Opsec 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 Iom Opsec 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. Review the folder before installing.

What licence does Iom Opsec use?

Iom Opsec is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Iom Opsec use?

About 1.4k tokens (SKILL.md is roughly 5.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Iom Opsec?

Skills that share tags, products or a category with Iom Opsec: Strix Code Vulnerability Scan (usestrix/strix, 67k stars), Code Audit (3stoneBrother/code-audit, 893 stars), Fix Strix Security Findings (usestrix/strix, 67k stars) and Metabigor OSINT Recon (j3ssie/metabigor, 1.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Iom Opsec?

chainreactors (a GitHub organization) maintains it in chainreactors/malice-network, which has 500 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on September 5, 2026.

Source: chainreactors/malice-network on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.