Defcon 20 CTF Forensics 300 Write up (f300)

By hip

这题所用到的工具:

Binwalk Firmware Analysis Tool

firmware-mod-kit

signature=wrgnd08_dlob_dir815

谷哥下可以发现是 D-Link  DIR-815 Firmware

所以应该就是 Firmware 分析题

於是先透过 Binwalk 看一下结构

压缩格式为 squashfs + lzma,了解结构之后换用另一套工具firmware-mod-kit 提取 Fireware 碰碰运气.

./extract-ng.sh /root/Desktop/makeFirmware/f300

运气不错提取成功.注意到 rootfs 目录.进入翻一翻发现 /home/下有个dlink目录进入后就发现key.txt  ^_^

Key: ewe know, the sh33p always preferred Linksys

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