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  1. Prikvačeni tweet
    27. pro 2019.

    new pinned tweet

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  2. proslijedio/la je Tweet
    1. velj

    Here is my massive lib db (for ctfs/wargames/blind pwns etc.). It consists of thousands of libs across over a dozen Linux distributions and architectures spanning the last 20 years. It indexes symbols & gadgets (including one gadgets AKA magic gadgets).

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  3. Debugging on a VPS is super annoying, spammed F7 and it just kept going for a while on it's own.

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  4. 1. velj

    Today and I set up a laptop for a friend in need of a computer. They've never used Linux before, so we figured that they'd be a great person to test out our own distro we've been working on: Sean Paul Linux.

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  5. 1. velj

    "Our cloud service is going away Feb. 1st, so you can no longer add credits." OK THANKS

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  6. 1. velj

    There are also still some bits you can change in this binary to segfault strace, but I'll have to write about that some other time.

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  7. 1. velj

    Also! Because the binary itself is predictable, and the easily shiftable base address of 0x100000000, pretty much anything in the binary is reusable as a constant, such as say, using \x7fELF + some part of the program header as seeds or keys.

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  8. 1. velj

    It gets really tricky on this level to include more complex functionality without sacrificing size or reliability. This PoC is rather simple, but demonstrates one method of signature evasion using a very small decoder stub for your payload.

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  9. 1. velj

    So the reason this really means much is because I'd been testing different ways of using encrypted payloads without modifying the precariously balanced headers. The options for doing so without a larger binary with proper headers are slim, so I picked the stack to exec from.

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  10. 31. sij

    Just heard tacobells canon in D for the first time

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  11. 31. sij
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  12. 31. sij

    Now a 147 byte polymorphic execve('//bin/sh') ELF64! Greetz 2 Anonymous_ for using the p_align cave trick to bring it down 8 bytes from the original. We golfin' here.

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  13. 31. sij

    149 byte version has been achieved :D

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  14. 31. sij

    Will push source to the golfclub repo later

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  15. 31. sij

    155b polymorphic execve(/bin/sh) ELF64 base64 -d <<< f0VMRmoBWUiJ57He60aQkAIAPgABAAAABAAAAAEAAAAcAAAAAAAAAAAAAAAAAAAAAQAAAEAAOAABAAIAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAxwQkSO8MlsdEJARl8fG8x0QkCLew8a3HRCQMtpYfNcdEJBDWjZZXx0QkFDmOiZbHRCQYVzhu5cdEJBzR2wAAgDQP3uL6/+c= >p;chmod +x p;./p

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  16. 30. sij

    very excited to drop the first show notes for the season 3 premiere of next week :D

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  17. 29. sij

    Really enjoying this NASM programming tutorial, I've been doing it all wrong...

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  18. 29. sij

    Today in cursed malware:

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  19. 27. sij

    Have you ever tried to figure something out, got stuck, then went to sleep, and had a dream about that thing, and work out a solution in your dream? And then it works in real life? This has happened to me quite a few times. Is there a name for this phenomenon?

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  20. 24. sij

    eating the saltiest food you've ever tasted while listening to a toddler screaming match and helping remotely debug software issues via text

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  21. 24. sij

    I'm all cybered out atm.

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