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🔒 GDG Algiers CTF 2022 / ✅-reverse-oldschool
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Sutx BOT 10/07/2022 11:01 AM
oldschool - 500 points
Category: Reverse Description: > You'll probably recognize this format just by looking at the size of the binary file Author : red0xff Files:Tags: No tags.
10/07/2022 11:01 AM
Sutx pinned a message to this channel. 10/07/2022 11:01 AM
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Sutx BOT 10/07/2022 12:55 PM
@TheBadGod wants to collaborate 🤝
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sahuang 10/07/2022 1:10 PM
its some sort of floppy disk?
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TheBadGod 10/07/2022 1:10 PM
yes
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sahuang 10/07/2022 1:10 PM
512 bytes
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TheBadGod 10/07/2022 1:10 PM
boot sector
13:10
reads 8 bytes and then verifies them somehow
Image attachment
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sahuang 10/07/2022 1:11 PM
which decoder did u use?
13:11
bootcode_parser?
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TheBadGod 10/07/2022 1:11 PM
metapc
13:11
default
13:11
but in ida32, and loaded at offset 0x7c00
13:11
and when asked if its 16 or 32 bit code select 16 bit (so not 32 bit)
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sahuang 10/07/2022 1:12 PM
ic
13:12
oh wait ida can recognize it?
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TheBadGod 10/07/2022 1:12 PM
yeah
13:12
or well no
13:12
its just a binary file after all
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sahuang 10/07/2022 1:14 PM
i did the same but no graphy view, weird
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TheBadGod 10/07/2022 1:14 PM
make a function (using p) then press space
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sahuang 10/07/2022 1:14 PM
oh thx
13:14
didn know it
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TheBadGod
used /ctf solve
Sutx BOT 10/07/2022 1:33 PM
✅ Challenge solved.
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TheBadGod 10/07/2022 1:34 PM
ctf{w00TMbrR}
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sahuang 10/07/2022 1:34 PM
🛐 god
Exported 26 message(s)