Challenge
We were given a single file, miss_grand.jpeg (481x636), an AI-styled promotional poster reading "Miss Grand Tanzania 2026". The task is to put the woman's full name in the flag.
Solution
Step 1 - Rule out hidden data
First the usual checks, in case the name was buried instead of visible:
| Check | Result |
|---|---|
| EXIF / GPS | none, only basic JFIF density tags |
| C2PA / JUMBF manifest | none |
| Trailing data after the JPEG EOI | none (0 bytes) |
| ASCII strings | nothing readable, no flag, no handle |
The image is clean. Everything we need is in the picture itself, so this is a face-identification problem, not a forensics one.
Step 2 - Reverse search the face
The background (Kilimanjaro, the flag, the gold mandala) is AI filler, so the "Miss Grand Tanzania 2026" caption plus a crop of the face is what we search on. Running the face through reverse image search returns the real person behind the styled poster:
| Engine | Result |
|---|---|
| Reverse image / face search | matches the Miss Grand Tanzania 2026 titleholder |
| News confirmation | crowned Miss Grand Tanzania 2026 (Mwanza), then won Miss Grand International 2026 in Bangkok |
Her full name, as carried by the international pageant press, is Jihan Mohin Dimachk (Tanzanian outlets also write it Jihan Dimack).
Step 3 - Confirm
Cross-checking the news: Jihan Mohin Dimachk, representing Mwanza, won the national Miss Grand Tanzania title on 8 August 2026, then on 10 October 2026 became the first African woman to win Miss Grand International. The face, the sash title and the year all agree with the poster.
Flag
hiCTF{Jihan-Mohin-Dimachk}Takeaways
- Check for metadata, trailing bytes and embedded strings before assuming a poster is "just" an identify-the-person task, but do not over-think a clean file.
- AI-styled graphics still reverse-search on the real face. Crop to the face and ignore the generated background.
- Names cross borders in more than one spelling. Pin the identity down with a dated news source, and note the variant spelling the scoreboard expects.