MacroHard WeakEdge

Problem

I've hidden a flag in this file. Can you find it? Forensics is fun.pptm

• Forensics is fun.pptm

Solution

1. Extract the PowerPoint presentation as a ZIP file, since PowerPoint files are actually ZIPs: unzip Forensics\ is\ fun.pptm

2. Looking through the extracted files, ppt/slideMasters/hidden looks suspicious.

3. Reading that file (cat ppt/slideMasters/hidden) shows Z m x h Z z o g c G l j b 0 N U R n t E M W R f d V 9 r b j B 3 X 3 B w d H N f c l 9 6 M X A 1 f Q.

4. We can decode that as base64 using CyberChef to get the flag.

Flag

picoCTF{D1d_u_kn0w_ppts_r_z1p5}