Reversing and Cracking first simple Program - bin 0x05
496,958
Published 2015-12-29
GitHub: github.com/LiveOverflow/liveoverflow_youtube/tree/…
crackmes.de/
www.hopperapp.com/
www.hex-rays.com/products/ida/
github.com/radare/radare2
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#ReverseEngineering
All Comments (21)
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This is awesome. This is all, absolutely phenomenal. I've been taking part in many CTFs but I don't do well with binary exploitation (much more than simple buffer overflows and simple format string vulnerabilities) -- I don't know how to 'pwn' very well yet! I've subscribed -- how quickly we can expect more? :)
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This video contains stuff no one will explain to you. That print to paper concept was awesome. Helped me a lot. THANKS A LOT
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9 minute video just took me 40 mins to watch.
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Create a file "~/.gdbinit" with the text "set disassembly-flavor intel" to avoid typing the command to switch syntax everytime
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As a complete assembly/disassembly n00b I've watched this vid several times, applying it to the example or to other codelets I've written. Pure gold! I'm slowly starting to get it! :)))
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Most common jumps: je (jump if equal, zero flag = 1) jne (jump if not equal, zero = 0) jb (jump if unsigned lower, Carry=1) jbe (same as above with or equal) ja (jump if unsingned greater) jae (same as above with or equal) ... List goes on to more specified flag relative jumps, signed lower/greater jumps and a few weird ones.
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This was really cool! Thank you, you just made Assembly 10x less intimidating for me.
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Thanks for taking the time to do this in such an easy-to-understand professional manner
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Just an observation, when you pause a video youtube forces the timeline bar which covers code, and also title at the top - this means that running fullscreen (second monitor) it's quite often I have to un-fullscreen and use theater mode. Might be a rare problem, but depending on how it affects things aesthetically it might be useful to at least not use the bottom/top ~15th for what the audience is actively looking at. Thanks though!
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Guys all those struggling with this, watch the video again and again. Thanks to liveoverflow for this. This is insanely awesome!!
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Good job. Even after making a huge graphical game in assembly you did give me some new tools, well done! The way you explain stuff is great, keep going!
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"strings ./license_1" also gives you the key in this case. I know it's only an example.
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Your visceral and immediate disgust at AT&T syntax is very relatable and made me literally laugh out loud!
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If you want to get the main function in one line, you can use this command: "gdb -batch -ex 'file license_1' -ex 'set disassembly-flavor intel' -ex 'disassemble main' " I used it to pipe a lp in the end to print it (Just add "| lp" at the end of the command) but you have to configure your printer with cups
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Your teaching style demonstrates one SIMPLE thing, VERY WELL: It just goes to show, if one's mind doesn't naturally gravitate to - and understand - ASM - it doesn't matter HOW "1337" all these "H4X0R5" online think they are - none of it means ANYTHING if they can't translate it smoothly and concisely for people who aren't in their "club" - you are the EXCEPTION, and you teach SO WELL. God bless you and thank you, I mean it from the bottom of my heart.
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I'm late but I've always wondered how cracking stuff like this works, and you made me understand everything, this is amazing <3
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Made this crackme return the actual valid key when given the wrong one. That was a lot of fun, awesome videos.
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This was beautiful. Thank you so much for walking it through TuT
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this was an amazing experience. Thanks for the great content!
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All your videos are really great and of top quality. Thank you very much bro. You are truly awesome. Keep it up :)
