Reverse Engineering

Transformation [20 pts] [Not Solved]

Description

I wonder what this really is... enc ''.join([chr((ord(flag[i]) << 8) + ord(flag[i + 1])) for i in range(0, len(flag), 2)])

Solution

a

Flag:

keygenme-py [30 pts] [Not Solved]

Description

keygenme-trial.py

Solution

a

Flag:

crackme-py [30 pts]

Description

crackme.py

Solution

So opening up the code I noticed that their are two functions, but when ran only 1 is called. I added only 1 line of code that would print out the flag.

decode_secret(bezos_cc_secret)

Flag: picoCTF{1|\/|_4_p34||ut_8c551048}

ARMssembly 0 [40 pts] [Not Solved]

Description

What integer does this program print with arguments 4004594377 and 4110761777? File: chall.S Flag format: picoCTF{XXXXXXXX} -> (hex, lowercase, no 0x, and 32 bits. ex. 5614267 would be picoCTF{0055aabb})

Solution

a

Flag:

speeds and feeds [50 pts] [Not Solved]

Description

There is something on my shop network running at nc mercury.picoctf.net 28067, but I can't tell what it is. Can you?

Solution

a

Flag:

Shop [50 pts] [Not Solved]

Description

Best Stuff - Cheap Stuff, Buy Buy Buy... Store Instance: source. The shop is open for business at nc mercury.picoctf.net 3952.

Solution

a

Flag:

ARMssembly 1 [70 pts] [Not Solved]

Description

For what argument does this program print `win` with variables 83, 0 and 3? File: chall_1.S Flag format: picoCTF{XXXXXXXX} -> (hex, lowercase, no 0x, and 32 bits. ex. 5614267 would be picoCTF{0055aabb})

Solution

a

Flag:

ARMssembly 2 [90 pts] [Not Solved]

Description

What integer does this program print with argument 3297082261? File: chall_2.S Flag format: picoCTF{XXXXXXXX} -> (hex, lowercase, no 0x, and 32 bits. ex. 5614267 would be picoCTF{0055aabb})

Solution

a

Flag:

Hurry up! Wait ! [100 pts] [Not Solved]

Description

svchost.exe

Solution

a

Flag:

gogo [110 pts] [Not Solved]

Description

Hmmm this is a weird file... enter_password. There is a instance of the service running at mercury.picoctf.net:34256.

Solution

a

Flag:

ARMssembly 3 [130 pts] [Not Solved]

Description

What integer does this program print with argument 4012702611? File: chall_3.S Flag format: picoCTF{XXXXXXXX} -> (hex, lowercase, no 0x, and 32 bits. ex. 5614267 would be picoCTF{0055aabb})

Solution

a

Flag:

Let's get dynamic [150 pts] [Not Solved]

Description

Can you tell what this file is reading? chall.S

Solution

a

Flag:

Easy as GDB [160 pts] [Not Solved]

Description

The flag has got to be checked somewhere... File: brute

Solution

a

Flag:

ARMssembly 4 [170 pts] [Not Solved]

Description

What integer does this program print with argument 3459413018? File: chall_4.S Flag format: picoCTF{XXXXXXXX} -> (hex, lowercase, no 0x, and 32 bits. ex. 5614267 would be picoCTF{0055aabb})

Solution

a

Flag:

Powershelly [180 pts] [Not Solved]

Description

It's not a bad idea to learn to read Powershell. We give you the output, but do you think you can find the input? rev_PS.ps1 output.txt

Solution

a

Flag:

Rolling My Own [300 pts] [Not Solved]

Description

I don't trust password checkers made by other people, so I wrote my own. It doesn't even need to store the password! If you can crack it I'll give you a flag. remote nc mercury.picoctf.net 47110

Solution

a

Flag:

Checkpass [375 pts] [Not Solved]

Description

What is the password? File: checkpass Flag format: picoCTF{...}

Solution

a

Flag: