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CTF stegano practice stegano 9
2022-07-05 03:52:00 【qq_ twenty-nine million five hundred and sixty-six thousand six】
First step , First use TrID The tool identifies the types of two files :
among ,ELF File is Linux Main executables under . A more accurate analysis can use linux Under the file command , See is coredump file :
As for what is coredump, You can see hereChange suffix to open pcap file , adopt Ctrl+F find server hello In the bag session_id:
Client ( Browser side ) Through a named ssl_session_st Structure storage of SSL Related key parameters , among ssl_session_st Some data structures of are shown as follows :Use C32Asm open file2 And search for 16 Base number :
Check out session-id, Forward should be 0x00000020, The length is 32, It should be master-key 了 :Get flag:
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