Sebastian's Blog

software developer. security enthusiast.

Day: 24 December 2019

HV19.24 ham radio

I haven’t solved this during the contest, but I want to share my solution. The zip file contained a binary file named brcmfmac43430-sdio.bin; which is a Broadcom 43430 SDIO firmware. After some time poking around using ghidra I found a base64 encoded string Um9zZXMgYXJlIHJlZCwgVmlvbGV0cyBhcmUgYmx1ZSwgRHJTY2hvdHRreSBsb3ZlcyBob29raW5nIGlvY3Rscywgd2h5IHNob3VsZG4ndCB5b3U/ which decodes to Roses are red, Violets are blue, DrSchottky loves […]