Nes Decompile
jonathanpeppers/dotnes
Decompile NES ROM files (.nes) into C projects that can be rebuilt with dotnes.
A skill your agent uses when reverse-engineering or detecting malware — static triage + capa/YARA-X, emulation/DBI/.NET unpacking, dynamic/fileless/Volatility 3 memory analysis, C2 config extraction…
$ npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hypnguyen1209/offensive-claude malware-analysis --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/malware-analysis .claude/skills/malware-analysis && rm -rf skills-srcUse ~/.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/
Install the "malware-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/malware-analysis into .claude/skills/malware-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "malware-analysis", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/malware-analysisType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hypnguyen1209/offensive-claude malware-analysis --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/malware-analysis .agents/skills/malware-analysis && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "malware-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/malware-analysis into .agents/skills/malware-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "malware-analysis", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hypnguyen1209/offensive-claude malware-analysis --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/malware-analysis .cursor/skills/malware-analysis && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "malware-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/malware-analysis into .cursor/skills/malware-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "malware-analysis", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/hypnguyen1209/offensive-claude.git --path skills/malware-analysis--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hypnguyen1209/offensive-claude malware-analysis --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/malware-analysis .gemini/skills/malware-analysis && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "malware-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/malware-analysis into .gemini/skills/malware-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "malware-analysis", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install hypnguyen1209/offensive-claude malware-analysisInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/malware-analysis .github/skills/malware-analysis && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "malware-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/malware-analysis into .github/skills/malware-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "malware-analysis", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hypnguyen1209/offensive-claude malware-analysis --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/malware-analysis .opencode/skills/malware-analysis && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "malware-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/malware-analysis into .opencode/skills/malware-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "malware-analysis", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
malware-analysisA skill your agent uses when reverse-engineering or detecting malware — static triage + capa/YARA-X, emulation/DBI/.NET unpacking, dynamic/fileless/Volatility 3 memory analysis, C2 config extraction…
Malware Analysis is an agent skill from hypnguyen1209/offensive-claude. Use when reverse-engineering or detecting malware — static triage + capa/YARA-X, emulation/DBI/.NET unpacking, dynamic/fileless/Volatility 3 memory analysis, C2 config extraction (Cobalt Strike/CAPE), C2 traffic detection (JA4+, beaconing)
Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 15 other files, including scripts and reference files (for example `references/config-c2-extraction.md`, `references/dynamic-fileless-memory.md` and `references/network-c2-detection.md`).
It sits in Security, covering Reverse engineering and malware. It works with .NET and Frida. The repository describes itself as: Offensive security toolkit for Claude Code covering red team, exploit dev, AD attacks, EDR bypass, mobile pentest. The licence is MIT.
Read from SKILL.md and the folder at commit a506ad3. It shows what the files ask for, not the result of running them.
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.
Ships 7 files in scripts/ (Python and JavaScript), which the agent can run.
Shell commands in SKILL.md call:
python3From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Malware Analysis loads about 2.3k tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 64 tokens; SKILL.md has 538 words of instructions outside code blocks.
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.
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.
The full file from hypnguyen1209/offensive-claude at commit a506ad3, republished under its MIT licence (© hypnguyen1209). 538 words, ~2,288 tokens.
.claude/skills/malware-analysis/SKILL.md (or your agent's skills folder). This skill also uses 13 other files; get the full folder from GitHub.| Technique | ATT&CK | CWE | Reference | Script |
|---|---|---|---|---|
| Hash/imphash/Rich/ssdeep/TLSH triage + PE anomalies | T1027 | CWE-506 | references/static-triage-capa.md | scripts/triage.py |
| Per-section entropy + packer/RWX/EP heuristics | T1027.002 | CWE-1066 | references/static-triage-capa.md | scripts/triage.py |
| Obfuscated string recovery (FLOSS) | T1140, T1027.013 | CWE-656 | references/static-triage-capa.md | scripts/triage.py |
| Capability detection → ATT&CK (capa, static+dynamic) | T1027 | CWE-506 | references/static-triage-capa.md | scripts/triage.py |
| Emulation unpacking (Unicorn/unipacker/Speakeasy/Qiling) | T1140, T1620 | CWE-656 | references/unpacking-deobfuscation.md | scripts/auto_unpack.py |
| DBI unpacking via API hooks (Frida) | T1055, T1620 | CWE-656 | references/unpacking-deobfuscation.md | scripts/frida_unpack.js |
| .NET deobfuscation/unpacking (de4dot/dnSpyEx) | T1027, T1140 | CWE-656 | references/unpacking-deobfuscation.md | scripts/frida_unpack.js |
| Sandbox detonation + behavioral capture | T1497 | CWE-506 | references/dynamic-fileless-memory.md | scripts/mem_triage.py |
| Memory injection/hollowing/ghosting analysis (Vol3) | T1055, T1055.012 | CWE-506 | references/dynamic-fileless-memory.md | scripts/mem_triage.py |
| AMSI/ETW in-memory patch + patchless detection | T1562.001 | CWE-693 | references/dynamic-fileless-memory.md | scripts/mem_triage.py |
| Fileless WMI/registry/PowerShell persistence | T1546.003, T1547.001, T1059.001 | CWE-506 | references/dynamic-fileless-memory.md | scripts/mem_triage.py |
| Cobalt Strike / AdaptixC2 config extraction | T1071.001, T1573 | CWE-798 | references/config-c2-extraction.md | scripts/cs_config_extract.py |
| Config framework at scale (MACO/CAPE) | T1071.001 | CWE-798 | references/config-c2-extraction.md | scripts/cs_config_extract.py |
| Generic unknown-C2 protocol RE + decoder | T1573, T1071.004 | CWE-311 | references/config-c2-extraction.md | scripts/cs_config_extract.py |
| Beacon cadence/jitter detection (PCAP/Zeek) | T1071.001, T1029 | CWE-778 | references/network-c2-detection.md | scripts/beacon_profiler.py |
| JA4+ TLS/HTTP/cert fingerprinting (Sliver/Havoc JA4X) | T1071.001, T1573 | CWE-295 | references/network-c2-detection.md | scripts/beacon_profiler.py |
| Tunneled/DoH C2 surfacing (cloudflared/chisel) | T1572, T1568.002, T1071.004 | CWE-441 | references/network-c2-detection.md | scripts/beacon_profiler.py |
| YARA-X family rule authoring + FP validation | T1027 | CWE-506 | references/yara-detection-engineering.md | scripts/yara_gen.py |
# 1. Static triage: hashes + PE anomalies + capability combos + FLOSS/capa/YARA-X
python3 scripts/triage.py sample.exe --floss --capa --yara rules/family.yar --json out/triage.json
capa -j sample.exe > out/capa.json # capabilities -> ATT&CK
# 2. Unpack (try emulation first; DBI fallback in isolated VM)
python3 scripts/auto_unpack.py sample.exe -o out/dumps/ # static emulation, no detonation
frida -f C:\sample.exe -l scripts/frida_unpack.js --no-pause # DBI, isolated VM only
de4dot sample.exe -o cleaned.exe # .NET layer
# 3. Dynamic + memory (capture mem BEFORE remediation)
python3 scripts/mem_triage.py -f mem.raw --vol vol --patch-hunt --json out/mem.json
# 4. Config + C2 extraction
python3 scripts/cs_config_extract.py beacon.bin --json # Cobalt Strike
python3 1768.py -S beacon.bin # full CS incl. runtime/heap config
configextractor sample.bin # MACO/MWCP/CAPE at scale
# 5. Network C2 detection
python3 scripts/beacon_profiler.py capture.pcap --min-beacons 6 # cadence/jitter
zeek -r capture.pcap LOCAL ja4 && zeek-cut ja4 ja4s ja4x < ja4.log # JA4+ pivots
# 6. Detection engineering
python3 scripts/yara_gen.py --family samples/fam/ --name Fam --goodware /usr/bin --out rules/fam.yar
yara-x fmt rules/fam.yar && yara-x scan rules/fam.yar /corpus/| Technique | Telemetry/IOC | Detection (Sigma/EDR) | OPSEC note |
|---|---|---|---|
| Static triage | None (offline) | n/a — feeds YARA/imphash hunting | Read-only, no execution; isolate sample dir |
| Emulation unpack | None (no detonation) | n/a | Preferred first pass; safe, no network |
| DBI/manual unpack | Sysmon 8/10 (CallTrace UNKNOWN), RWX commit | EDR memory scan; RWX-then-exec Sigma | DETONATES — isolated VM, snapshot, FakeNet; loaders self-delete, dump first |
| Injection/hollowing | malfind/hollowprocesses; EID 8/10 | Vol3 hollow/ghosting/pebmasquerade; CreateRemoteThread | Capture memory pre-remediation |
| AMSI/ETW patch | amsi.dll load + patched prologue; B8 00..C3 stub | Sigma T1562.001; debug-reg+VEH for patchless | Patchless evades byte scans — watch Dr0-Dr7 |
| Fileless persistence | WMI consumers; PS 4104; Run-key blobs | Vol3 registry/wmi; Sysmon 13/22 | Lives in WMI/registry/memory — no disk file |
| Config extraction | C2 host/UA/pipe/watermark | YARA config table; Suricata on C2 URI/SNI | Offline; handle watermark/keys per ROE |
| Beacon detection | Periodic outbound deltas | beacon_profiler CV score; Suricata threshold | Passive on captured traffic |
| JA4+ fingerprint | JA4/JA4S/JA4X/JA4H tuples | Zeek ja4 watchlist (Sliver/Havoc JA4X) | JA4X needs TLS1.3 cert visibility at proxy |
| YARA-X authoring | None | The rules themselves | Validate 0-FP on goodware before deploy |
© hypnguyen1209, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 13 other files (scripts, references) in skills/malware-analysis of hypnguyen1209/offensive-claude.
Open the folder on GitHubat commit a506ad3
Malware Analysis 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Malware Analysis this skillhypnguyen1209/offensive-claude | 388 | — | ~2.3k | Automated safety check: Pass | MIT | |
| Nes Decompilejonathanpeppers/dotnes | 780 | — | ~1.6k | Automated safety check: Pass | MIT | |
| Patch Diff AnalyzerHacktronAI/skills | 115 | — | ~2.2k | Automated safety check: Pass | MIT | |
| Ctf Malwareljagiello/ctf-skills | 3.4k | — | ~2.1k | Automated safety check: Notes | MIT | |
| Rev Unicorn Debugindex-login/MobileRE-Skill | 144 | — | ~1.9k | Automated safety check: Pass | MIT | |
| Karpathy Guidelinesindex-login/MobileRE-Skill | 144 | — | ~242 | Automated safety check: Pass | MIT |
jonathanpeppers/dotnes
Decompile NES ROM files (.nes) into C projects that can be rebuilt with dotnes.
HacktronAI/skills
Specialized in reverse-engineering compiled binaries (JARs, DLLs).
ljagiello/ctf-skills
Provides malware analysis and network traffic techniques for CTF challenges.
index-login/MobileRE-Skill
Debug and emulate specific code fragments or functions using the Unicorn engine.
index-login/MobileRE-Skill
减少 LLM 常见编码错误的行为准则。在编写、审查或重构代码时使用,避免过度设计、精准修改、暴露假设、定义可验证的成功标准。
sickn33/agentic-awesome-skills
Authorized Android/iOS application reverse engineering and security testing: APK/IPA analysis, runtime instrumentation (Frida/Objection), SSL-pinning and jailbreak/root-detection bypass, per OWASP…
hypnguyen1209/offensive-claude
A skill your agent uses when assessing cryptography — TLS/PKI auditing, RSA/ECC key attacks, ECDSA nonce lattice recovery, symmetric/AEAD misuse, JWT/JOSE forgery, hash cracking, post-quantum…
hypnguyen1209/offensive-claude
A skill your agent uses when responding to or forensically investigating an incident — triage acquisition (Velociraptor/KAPE), Volatility 3 memory forensics, Chainsaw/Hayabusa EVTX timelining…
hypnguyen1209/offensive-claude
A skill your agent uses when mapping a target's external attack surface or gathering OSINT — subdomain enumeration, attack-surface mapping (httpx/katana/JS secrets), subdomain takeover…
hypnguyen1209/offensive-claude
A skill your agent uses when hunting threats or engineering detections — ATT&CK Detection-Strategies, Sigma + correlation with Detection-as-Code CI, Windows endpoint hunting…
hypnguyen1209/offensive-claude
A skill your agent uses when starting an engagement, before exploitation, or whenever the attack surface changes — build/validate the threat model and detect drift (new unreviewed surface) before…
hypnguyen1209/offensive-claude
A skill your agent uses when creating or editing a skill in this offensive-claude repo — for the SKILL.md conventions (trigger descriptions, technique map, runnable scripts, OPSEC/detection…
Categories
A skill your agent uses when reverse-engineering or detecting malware — static triage + capa/YARA-X, emulation/DBI/.NET unpacking, dynamic/fileless/Volatility 3 memory analysis, C2 config extraction…. Malware Analysis is an agent skill from hypnguyen1209/offensive-claude.
Malware Analysis fits situations like: reverse-engineering; detecting malware — static triage + capa/YARA-X; emulation/DBI/.NET unpacking; dynamic/fileless/Volatility 3 memory analysis.
Run `npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a claude-code`. Or copy the skill folder (skills/malware-analysis in hypnguyen1209/offensive-claude) into .claude/skills/malware-analysis in your project. Claude Code loads it when a task matches its description.
Run `npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a codex`. Or copy the skill folder (skills/malware-analysis in hypnguyen1209/offensive-claude) into .agents/skills/malware-analysis in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hypnguyen1209/offensive-claude --skill malware-analysis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/malware-analysis, .gemini/skills/malware-analysis, .github/skills/malware-analysis and .opencode/skills/malware-analysis in your project.
Going by SKILL.md and its folder, Malware Analysis needs Python and JavaScript for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3; Node.js.
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.
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.
Malware Analysis is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 2.3k tokens (SKILL.md is roughly 9.2k 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 11k tokens, read only when the agent opens those files.
Skills that share tags, products or a category with Malware Analysis: Nes Decompile (jonathanpeppers/dotnes, 780 stars), Patch Diff Analyzer (HacktronAI/skills, 115 stars), Ctf Malware (ljagiello/ctf-skills, 3.4k stars) and Rev Unicorn Debug (index-login/MobileRE-Skill, 144 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
hypnguyen1209 (a GitHub user) maintains it in hypnguyen1209/offensive-claude, which has 388 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on September 28, 2026.
Source: hypnguyen1209/offensive-claude on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.