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GusC's avatar
GusC
Icon for Bronze III rankBronze III
5 months ago
Solved

Malware Analysis: Shlayer

I've done the first 2 questions but stuck on the 3rd - what is the XOR key? Is this found in the first or second stage 7z compressed file? and....the lab description mentions Cyberchef - is this ava...
defensive cyber
  • IotS2024's avatar
    IotS2024
    5 months ago

    Mmmhh, i looked at the lab to help you. Noticed it was a hard one. Tried what was in my mind for the xor-key and it was right. This key only has 2 chars. A number and a letter. Try searching for ^ in ghidra.

    good luck :) 

RobN's avatar
RobN
Icon for Bronze III rankBronze III
5 months ago

How did you find the obfuscated_data on this one? I can see that _host appears to take its data from zzz43...24cl but when I look at this in the _DATA section the data is given as undefined?

  • GusC's avatar
    GusC
    Icon for Bronze III rankBronze III
    5 months ago

    Hi Rob - there's a bit of Hex just under that. Put them in CyberChef

    recipe "from hex\auto" then "reverse by char" then "xor" with the 2 digit key.