Cyber Apocalypse 2021


Solved by : Nigamelastic

  • import the file in salea logic analyzer, and use i2c analyzer
  • export the data and you will see two columns if we take everything written and try the hex dump we get
3M.2B1.4B.1dV_5. yS.5B7k3..1V.Qxm.!j.@Q52yq)t%# @5%md}S.
  • and we can see its slightly off i noticed the following :

  • so i used only 0x2C used the corresponding hex

which is

0x43 0x48 0x54 0x42 0x7B 0x6E 0x75 0x31 0x31 0x5F 0x37 0x33 0x32 0x6D 0x31 0x6E 0x34 0x37 0x30 0x32 0x35 0x5F 0x63 0x34 0x6E 0x5F 0x38 0x32 0x33 0x34 0x6B 0x5F 0x34 0x5F 0x35 0x33 0x32 0x31 0x34 0x31 0x5F 0x35 0x79 0x35 0x37 0x33 0x6D 0x21 0x40 0x35 0x32 0x29 0x23 0x40 0x25 0x7D
  • and got the flag
Published on : 24 Apr 2021