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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}

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