Analyze captured network traffic and binary messages to recover custom protocol structures. The skill organizes message types, fields, and connection states, then produces reproducible decoding steps with supporting evidence for authorized investigations.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.
Use for authorized reverse engineering of custom binary protocols, Protobuf/gRPC, WebSocket frames, and PCAP-driven protocol recovery.
설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.
NOW: 读取 ../field-journal/precedent-reverse.md — 确认授权与常规操作边界NOW: 确认任务是否为协议/流量/序列化格式逆向（非纯 Web 参数签名 → 转 js-reverse/）NOW: 若有目标网络交互 → ../scripts/case-init.ps1 完成 scope；auth 未 granted 禁止对目标 ACTNEXT: 读取 ../tool-index.md；缺工具 bootstrap（tshark/wireshark 等可能需手动）ACT: 进入工作流 Phase 1，产出帧布局或消息字典草稿| 情况 | 去哪 |
|---|---|
| 仅 HTTP 参数签名 / JS 加密 | js-reverse/ |
| 仅 TLS 证书问题 | pentest-tools/ 或浏览器代理 |
| 固件内协议栈深挖 + 仿真 | firmware-pentest/ 后再回本 skill |
□ 拿到样本：PCAP / 代理导出 / 客户端日志 / 二进制
□ 标记方向：C→S / S→C；是否有握手、心跳、重连
□ 固定头？魔数？长度字段？TLV？定长？
□ 是否压缩（zlib/gzip/lz4）或加密（AES/ChaCha 帧内）
□ tshark -r cap.pcap -T fields -e frame.number -e ip.src -e tcp.payload
□ 对齐多个同类消息，找不变字节 / 自增序列号
□ 长度字段：大端/小端、含头/不含头
□ 校验：CRC16/32、checksum、HMAC 位置
□ 画出状态机：Connect → Auth → Ready → Request/Response → Close
□ 工具：Wireshark 自定义 dissector 草稿 / ImHex / 010 Editor 模板 / Kaitai Struct
□ Protobuf：.proto 恢复（blackboxprotobuf / pbtk / protoc --decode_raw）
□ gRPC：HTTP/2 headers + protobuf body
□ 加密：找密钥派生（客户端 so/dll/JS）→ 联合 ida-reverse / js-reverse / apk-reverse
□ 重放：仅在授权 scope 内；先无害字段再敏感操作
MUST 产出：
- 消息类型表（name / opcode / fields）
- 至少 1 条可复现的解码命令或脚本
- Evidence：原始 hex 摘录 + 解码结果（脱敏）
| 工具 | 必需 | 用途 | 自举 |
|---|---|---|---|
| tshark / Wireshark | 强烈建议 | PCAP 解析 | 手动 / winget |
| Python3 | 是 | 解码脚本 | 系统 |
| blackboxprotobuf | 可选 | 未知 protobuf | pip |
| ImHex / 010 | 可选 | 结构模板 | 手动 |
| IDA / r2 / Ghidra | 按需 | 客户端序列化函数 | 见对应 skill |
references/protocol-workflow.md — 帧布局与 Protobuf 速查../ida-reverse/ ../js-reverse/ ../firmware-pentest/ ../pentest-tools/上游: MASTER-ROUTING R21 · routing.md
下游: 需客户端算法 → ida-reverse/js-reverse；需利用重放 → pentest-tools/api-security
同级: malware-analysis（C2 协议）、digital-forensics（流量取证）
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Assess authorized APIs through a ten-stage workflow covering endpoint discovery, authentication, access permissions, input handling, and request limits. Collect reproducible evidence and turn findings into regression checks that can run in a development pipeline.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.
Inspect Android APKs from the command line to understand app logic, permissions, and components. Supports Java decompilation, low-level code edits, rebuilding and signing, plus Frida observation of running methods and routing to native code analysis.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.
Plan and coordinate authorized penetration tests across multiple stages, from reconnaissance to access, privilege escalation, movement between systems, and impact assessment. Assign specialist skills, revise blocked paths, and maintain evidence and progress records for the final report.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.
Transfer known function and variable names from an older binary to a newer version. Compare disassembly and pseudocode with an LLM, produce structured mappings, and apply names and comments in IDA.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.
Inspect compiled programs in Binary Ninja using strings, function references, and intermediate representations—views of program logic at different levels. Trace data flow and report findings with addresses, supporting evidence, confidence, and reproduction steps.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.
Automate website navigation, form filling, content collection, and Windows desktop interactions. The skill selects browser or desktop tools for the task and guides screenshot capture and desktop network traffic observation when needed.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.