asepharyana
0de2458955
- Deleted all 14 dummy docs from DB + filesystem - Created 14 Gemastik warmup writeups + index via create_document API (DB-first) - ch1-ch12: encoding/stego/web/pwn basics - ch13: RSA small factors - ch14: RSA special integers via paper-search (GCD with paper appendix primes) - All 15 docs indexed and live at wiki.asepharyana.my.id
31 lines
752 B
Markdown
31 lines
752 B
Markdown
---
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title: "Needle — Strings Binary"
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type: "writeup"
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section: "writeups"
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status: "published"
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author: "asep"
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tags: ["gemastik", "ctf", "warmup", "forensics"]
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path: "writeups/gemastik-2026-warmup/ch3-needle.md"
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created_at: "2026-08-21T07:25:23.053Z"
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updated_at: "2026-08-21T07:25:23.053Z"
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event: "GEMASTIK 2026 Warmup"
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challenge: "Needle — Strings Binary"
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category: "forensics"
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points: 500
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difficulty: "easy"
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flag: "GEMASTIK19{str1ngs_c4n_f1nd_m3}"
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---
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# Needle (500 pts) — Steganografi / Binary
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**File:** `secret.bin` (748 bytes, binary)
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Teks tersembunyi di antara "junk data". Cukup ekstrak **strings** yang printable:
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```bash
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strings secret.bin | grep GEMASTIK
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# GEMASTIK19{str1ngs_c4n_f1nd_m3}
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```
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## Flag
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`GEMASTIK19{str1ngs_c4n_f1nd_m3}` |