backdoor

README

About

This is just a simple SSH server (mostly for testing/diagnostic purposes). For example, if you have a rooted Android and you want to quickly get SSH access to it, this backdoor is an easy solution.

Quick start

Build for ARM64

git clone https://github.com/xaionaro-go/backdoor
cd backdoor
CGO_ENABLED=0 GOARCH=arm64 go build

Upload to a smartphone

adb push backdoor /sdcard/Download/
adb shell 'su -c "mkdir -p /data/backdoor; mv /sdcard/Download/backdoor /data/backdoor/; chmod +x /data/backdoor/backdoor"'

Launch the backdoor

adb push ~/.ssh/id_ed25519.pub /sdcard/Download/authorized_keys
adb shell 'su -c "/data/backdoor/backdoor /bin/sh 0.0.0.0:8022 /sdcard/Download/authorized_keys"' &

Get the IP address

PHONE_ADDR="$(adb shell ip a show dev wlan0 | grep 'inet ' | tr "/" " " | awk '{print $2}')"

Login

ssh -p 8022 "$PHONE_ADDR"