Forum Discussion
Bronze IIIMalware 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 available in the lab? (as you cannot copy and paste out of this lab)
I just have this and the Qakbot one to complete than I have the "malware analysis badge"
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 :)
11 Replies
GusCits very easy done ! well done on completion.
RobNHi Gus, thank you - I checked this, the __DATA__bss section where the variable values are kept (that are referred to in the function) ghidra represents as undefined bytes. I'm currently checking other obfuscated data in the binary.
- RobN
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
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.
- KieranRowley
Community Manager
IotS2024Mmmhh, 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 :)
- GusC
superb - thanks a lot LotS2024 - lab complete now.
