competition-reverse-pwn

Imported from zhaoxuya520/reverse-skill (CTF-Sandbox-Orchestrator/competition-reverse-pwn/SKILL.md). Install upstream with npx skills add zhaoxuya520/reverse-skill --skill competition-reverse-pwn. Copyright stays with the author.

Competition Reverse Pwn

Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.

Use this skill for binary-heavy challenges where the decisive path runs through artifacts, decoded layers, process behavior, crash state, or exploit primitives.

Reply in Simplified Chinese unless the user explicitly requests English.

Quick Start

1. Preserve the original artifact before unpacking, patching, or instrumenting.
2. Start with passive triage: type, headers, sections, imports, strings, entropy, resources.
3. Decide whether the path is reverse-first, DFIR-first, or exploit-first.
4. Tie every claim to an observable boundary: decode edge, persistence edge, crash edge, or leak edge.
5. Reproduce the artifact or primitive from a clean baseline.

Workflow

1. Reverse Or Forensic Triage

• Separate loader, payload, config, and post-decode behavior.
• Correlate files, memory, logs, registry, services, tasks, IPC, and PCAPs as one graph.
• Keep decoded or dumped artifacts separate from the pristine sample.

2. Native And Exploit Path

• Map mitigations, loader behavior, libc or runtime, syscall and IPC surfaces, and protocol framing.
• Record the primitive, controllable bytes, leak source, target object, and final artifact separately.
• Compare host, libc, loader, and framing differences before doubting the primitive.

Read This Reference

• Load references/reverse-pwn.md for triage order, exploit evidence expectations, and common failure modes.
• If the task is specifically about staged payload boundaries, config blobs, beacon parameters, or decoded IOC fields, prefer $competition-malware-config.
• If the task is specifically about firmware partitions, boot chains, extracted filesystems, or update-package trust boundaries, prefer $competition-firmware-layout.
• If the task is specifically about upload parsing, previews, archive extraction, converters, or deserialization chains, prefer $competition-file-parser-chain.
• If the task is specifically about source maps, emitted bundles, chunk registries, or reconstructing hidden runtime structure from served frontend assets, prefer $competition-bundle-sourcemap-recovery.
• If the task is specifically about container-to-host boundary crossing, kernel exploit preconditions, namespace or cgroup crossover, or escape primitive verification, prefer $competition-kernel-container-escape.
• If the task is specifically about reconstructing protocols, streams, or transferred artifacts from packet captures, prefer $competition-pcap-protocol.
• If the task is specifically about a custom binary or text protocol where replay state, message order, or checksum logic is the real blocker, prefer $competition-custom-protocol-replay.
• If the task is specifically about reconstructing chronology across EVTX, PCAP, registry, mail, or disk artifacts, prefer $competition-forensic-timeline.

What To Preserve

• Offsets, hashes, section names, imports, config blobs, mutexes, registry keys
• Crash offsets, registers, heap or stack shape, leak addresses, and protocol steps
• Original, decoded, dumped, and instrumented artifacts as separate files