$ ctf42

#upx-unpacking CTF challenges

4 CTF challenges using upx-unpacking from 3 CTFs (2021–2025), 4 with writeups.

Reverse · 4

Often combined with

#reverse-engineering 1 #golang-reversing 1 #tea-cipher 1 #mips 1

Challenges

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Challenge CTF Weight Category Has
Ware
#upx-unpacking#reverse-engineering
 0x41414141 2021 – Reverse files wu 2
hash
#upx-unpacking#golang-reversing
 0x41414141 2021 – Reverse files wu 2
imPACKful
#upx-unpacking
 1337UP 2023 24.23 Reverse files wu 1
nips
#tea-cipher#upx-unpacking#mips
 BCACTF 2025 – Reverse files wu 1