If you thought Rainfall was easy, here’s a more daunting challenge. Override is last ISO that will have you search for faults present in the protected binaries, and re-build these binaries depending on their behavior.
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Download ISO here
subject | link |
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How Stack works | link |
Assembly Basics | link |
get buffer offset | link |
N° | Name | Flag |
---|---|---|
Flag0 | just comparing numbers | level00 |
Flag1 | shellcode | uSq2ehEGT6c9S24zbshexZQBXUGrncxn5sD5QfGL |
Flag2 | GOT | PwBLgNa8p8MTKW57S7zxVAQCxnCpV8JqTTs9XEBv |
Flag3 | debug logic | Hh74RPnuQ9sa5JAEXgNWCqz7sXGnh5J5M9KfPg3H |
Flag4 | buffer overflow | kgv3tkEb9h2mLkRsPkXRfc2mHbjMxQzvb2FrgKkf |
Flag5 | got + shell env | 3v8QLcN5SAhPaZZfEasfmXdwyR59ktDEMAwHF3aN |
Flag6 | decode serial hashing algo | h4GtNnaMs2kZFN92ymTr2DcJHAzMfzLW25Ep59mq |
Flag7 | intiger overflow | GbcPDRgsFK77LNnnuh7QyFYA2942Gp8yKj9KrWD8 |
Flag8 | symbol link | 7WJ6jFBzrcjEYXudxnM3kdW7n3qyxR6tk2xGrkSC |
Flag9 | buffer overflow | fjAwpJNs2vvkFLRebEvAQ2hFZ4uQBWfHRsP62d8S |
end | ___ | j4AunAPDXaJxxWjYEUxpanmvSgRDV3tpA5BEaBuE |
- switch to intel + enable cursor scroll + set hook-stop with general details(asm, info frame, info registers, 40 address of the stack $ESP)
set disassembly-flavor intel set height 0 define hook-stop disass echo ------------------------- [FRAME] -------------------------\n info frame echo ------------------------- [REGISTERS] -------------------------\n info reg echo ------------------------- [ESP] -------------------------\n x/10wx $esp end
- .gdbinit
set disassembly-flavor intel set height 0 info fun