›

Eat the Cake! by Little Pwnie

Padovah4ckPadovah4ck
in Challenges

Hi everyone ,
I've been trying for days this reverse challenge..
and it is obvious there is something that I can't catch!

I've used all "convention" tool : OllyDbg, Immunity Denugger, WinDbg, IDA..
I've also tried objdump to disassemble and mingw tools on linux ..

Am i on the right track? Any hint toward what I'm missing?

thanks,
p4d0vh4ck

Tagged:

Comments

  • jwstonejwstone

    I am having trouble as well. It does seem packed. Not sure if I correctly unpacked it.

  • decartdecart
    edited January 2018

    SPOILER

    decart

  • imA5imA5

    You've practically told them the solution...

  • decartdecart

    Sorry, if it's a spoiler please remove it... Just wanted to give them some directions, could've gone a bit far...

    decart

  • cyb3rs4k1cyb3rs4k1

    Hi. A little hint should be useful.

  • nihilliannihillian

    I solved it using Ollydbg, I am the noobest guy around here maybe, still I think it's kinda too easy for 60 points. You can't expect the password to be in plaintext format, just a little knowledge about assembly instructions is enough to get it.

  • lucazzzlucazzz

    I've just a question about the final password to retrieve: is it really 15 characters?

  • NarmuNarmu

    It doesn't run after unpacking it, is it supposed to do that?

  • gavzgavz
    edited June 2018

    try unpack on windows 7 if doesn't run after unpacking

  • gavzgavz

    @lucazzz said:
    I've just a question about the final password to retrieve: is it really 15 characters?

    Yes

  • NarmuNarmu
    edited June 2018

    @gavz I tried unpacking it on Windows 7 still not running...

  • linoslinos
    edited June 2018

    If it's supposed to work with upx, it doesnt on Windows 7. The produced binary is not unpacked properly. Is this normal? Should I try to unpack manually?

  • linoslinos

    Solved it. No need to manually unpack. If upx doesnt cut it for you, try some other tools.
    Pretty straight forward after unpacking.

  • gavzgavz
    edited August 2018

    @Narmu said:
    @gavz I tried unpacking it on Windows 7 still not running...

    tested on windows 8.1

  • NarmuNarmu

    @gavz thanks I figured it out, it was about which unpacker to use

  • gavzgavz

    @Narmu said:
    @gavz thanks I figured it out, it was about which unpacker to use

    I do not remember how i it unpack:
    1. upx.exe -d on VM windows 8.1 or windows 7 or
    2. through Ollydbg

  • LVx0LVx0

    I'm afraid I've been wasting my time on this challenge, so I'd appreciate some advice: how do you know if it's unpacked correctly? If it runs in the debugger, and it shows the ASCII strings that print out, etc., is it correct?

  • LVx0LVx0

    I finally solved this challenge. It just wasn't quite as straightforward as I expected from reading this thread. Feel free to DM for hints.

  • LVx0LVx0

    Oops so I spoke too soon. Turns out that two of the digits I only got because of guessing correctly.

  • chpppppchppppp

    I am a total RE noob - Could anyone PM me or post here some links to help solve this challenge?

    Appreciate everyones help! Thanks!

Sign In to comment.