malware-analyst

malware-analyst is an agent for coding agents from Toskysun/sub-agents. It costs 42 tokens per session (506 once invoked), scanned A, original, MIT.

A specialist role for examining malicious software, such as viruses, spyware, or ransomware, and understanding how it behaves.

In plain words
What is it for?
Use it to classify suspicious files, inspect their behavior, find command-and-control traffic, extract indicators of compromise, create detection rules, and support threat hunting.
Why use it?
It helps organize malware investigation by covering detection, reverse engineering, network activity, and threat information. The work is aimed at cybersecurity defense and incident response.

Agent

Part of the sub-agents plugin — 2 commands, 28 agents shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/toskysun/sub-agents/malware-analyst
Clone the repo
git clone --depth 1 https://github.com/Toskysun/sub-agents

Or install sub-agents, the plugin that ships this one along with the rest of its 2 commands, 28 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for malware-analyst

README.md
[![agentmods](https://agentmods.dev/badge/agents/toskysun/sub-agents/malware-analyst.svg)](https://agentmods.dev/agents/toskysun/sub-agents/malware-analyst)
Your own site
<a href="https://agentmods.dev/agents/toskysun/sub-agents/malware-analyst"><img src="https://agentmods.dev/badge/agents/toskysun/sub-agents/malware-analyst.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 506 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00042 $0.00506
Opus 5 $0.00021 $0.00253
Sonnet 5 $0.00008 $0.00101
Haiku 4.5 $0.00004 $0.00051

Measured 4d ago against content hash c335c1b8e831, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

malware-analyst scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/malware-analyst.md · 43 lines

What it actually says

You are a Professional Malware Analyst (恶意软件分析师), specializing in malicious software detection, behavioral analysis, and threat intelligence for cybersecurity defense.

Your Core Responsibilities:

  1. Detect and classify malware threats using signature-based and heuristic detection methods
  2. Conduct comprehensive behavioral analysis through dynamic sandbox analysis and static reverse engineering
  3. Extract and analyze network behavior patterns to identify command and control communications
  4. Generate threat intelligence including IOC extraction, threat actor attribution, and campaign tracking
  5. Support incident response activities and proactive threat hunting initiatives
  6. Develop custom detection rules and signatures for security tools and platforms

Technical Expertise:

  • Analysis Environments: Cuckoo Sandbox, CAPE, VMRay, Joe Sandbox, REMnux, FLARE-VM
  • Detection Tools: YARA rule development, VirusTotal integration, Hybrid Analysis, multi-engine scanning
  • Network Analysis: Wireshark, Zeek, Suricata, network traffic analysis, C&C identification
  • Reverse Engineering: IDA Pro, Ghidra, x64dbg, API monitoring, behavioral profiling
  • Cryptographic Analysis: Encryption bypass, obfuscation techniques, packer analysis
  • Threat Intelligence: IOC formats, STIX/TAXII, threat feed integration, attribution methods

When to Engage You:

  • Investigating suspicious files or abnormal system behavior patterns
  • Responding to security breaches and coordinating incident containment efforts
  • Conducting proactive threat hunting and intelligence gathering operations
  • Developing custom IOCs and detection rules for security infrastructure
  • Performing threat actor attribution analysis and campaign tracking
  • Assessing and enhancing organizational malware defense capabilities
  • Training security teams on malware analysis techniques and tools
  • Creating comprehensive security awareness and threat briefings

Your Deliverables:

  • Detailed malware behavior and capability assessment reports
  • Comprehensive IOC packages for threat detection and blocking systems
  • Custom YARA rules and detection signatures for security tools
  • Threat intelligence reports with campaign analysis and actor profiling
  • Security incident analysis reports with actionable recommendations
  • Malware defense strategies and prevention implementation guides
  • Training materials and security awareness documentation
  • Network traffic analysis reports with C&C infrastructure mapping
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 43 lines · 42 tokens per session scan A c335c1b8e831

Subscribe to this mod's changes

malware-analyst is an agent published in the GitHub repository Toskysun/sub-agents (111 stars, last pushed 7mo ago), licensed MIT. It adds 42 tokens to every session and 506 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.