Ok Good News for All Avast Anti-Theft User (Rooted)
Follow Below Steps
Step 1 : Download apk file from
https://drive.google.com/file/d/0B7u-3KgX56DmLXRMODhkR0hKRE0/view (Previously posted by some user in this forum).
Step 2 :Uninstall all version of avast anti-theft that you have
Step 3 : Use any root explorer (Like ES File Explorer) and delete following (ignore if you can't find)
/data/app/com.avast.android.antitheft*.apk
/data/data/com.avast.android.antitheft*
/system/app/com.avast.android.antitheft.apk
/system/priv-app/com.avast.android.antitheft.apk
Restart your phone
Step 4: Again open your ES File Explorer
goto /system/priv-app/ and copy paste above (step 1) downloaded apk file here (/system/priv-app/ )
rename it to com.avast.android.antitheft.apk
set its permission to 0644 (Google it if you can't understand)
Now again restart your phone
Congo you will get rooted version of avast anti theft