Use these commands to get the adapter working on Kali for packet injection and monitoring:

Commands:

• sudo apt update
• sudo apt upgrade
• sudo apt install bc
• sudo apt-get install build-essential
• sudo apt-get install libelf-dev

Try either of these commands to see which works:

• sudo apt-get install linux-headers-`uname -r`
• sudo apt-get install linux-headers-5.10.0-kali6-amd64
• sudo apt install dkms
• sudo rmmod r8188eu.ko
• git clone https://github.com/aircrack-ng/rtl8188eus
• cd rtl8188eus
• sudo -i
• echo "blacklist r8188eu" > "/etc/modprobe.d/realtek.conf"
• exit
• sudo reboot
• sudo apt update
• cd rtl8188eus
• sudo make
• sudo make install
• sudo modprobe 8188eu

To enable Monitor mode and test packet injection:

• sudo ifconfig wlan0 down
• sudo airmon-ng check kill
• sudo iwconfig wlan0 mode monitor
• sudo ifconfig wlan0 up
• iwconfig
• sudo aireplay-ng --test wlan0