good

the only thing that wasn't fun was installing libcrypto.so.1.1, but apart from that it's a good and fun chall

that was fun

bruh

change jnz to jmp in IDA. ;)

i can't debug

Solved with z3 and Cutter. I didn't notice any anti-debugging techniques, and I'm curious. Can someone that experienced that tell me about it? Thanks.

wouldn't call myself more experienced but i guess "debugging" here means actually running the application and debugging the live state as opposed to static analysis?

ptrace(0,0,0,0) functions prevents you debug the program.

Excellent ctf !!!

Look on disassembler you will find some conditions that will help you find the correct parameters. And the parameters are not in md5.

You are very close !!! I passed the same way as you. You have the condition of "(rdp-34h), 4?" and as you know you need to pass 4 arguments. Now try to see in IDA where the flow goes if you passed 4 arguments. You will be see 4 if conditions that will helps you to generate 4 equation with 4 variable and by that you will find the correct arguments.

Hello I had found another fake flag easy_f14g and using the if condition compose of 4 strtol and 4 equation i had found 4 value : 248.84050000000002 112.77770000000001 200.6176 309.4615

but its so wrong. Can u help me to understand the method? TY

i cant read your comment

SOLVED wrong linear equation. Ty for support!

I liked the challenge, was annoying that I I had to have a specific version of openssl installed. Was quicker just to manually recover.

good

the only thing that wasn't fun was installing libcrypto.so.1.1, but apart from that it's a good and fun chall

that was fun

bruh

change jnz to jmp in IDA. ;)

i can't debug

Solved with z3 and Cutter. I didn't notice any anti-debugging techniques, and I'm curious. Can someone that experienced that tell me about it? Thanks.

wouldn't call myself more experienced but i guess "debugging" here means actually running the application and debugging the live state as opposed to static analysis?

ptrace(0,0,0,0) functions prevents you debug the program.