Listing Installed Apps

When targeting apps that are installed on the device, you'll first have to figure out the correct package name of the application you want to analyze. You can retrieve the installed apps either by using pm (Android Package Manager) or by using frida-ps:

$ adb shell pm list packages
package:sg.vantagepoint.helloworldjni
package:eu.chainfire.supersu
package:org.teamsik.apps.hackingchallenge.easy
package:org.teamsik.apps.hackingchallenge.hard
package:sg.vp.owasp_mobile.omtg_android

You can include flags to show only third party apps (-3) and the location of their APK file (-f), which you can use afterwards to download it via adb pull:

$ adb shell pm list packages -3 -f
package:/data/app/sg.vantagepoint.helloworldjni-1/base.apk=sg.vantagepoint.helloworldjni
package:/data/app/eu.chainfire.supersu-1/base.apk=eu.chainfire.supersu
package:/data/app/org.teamsik.apps.hackingchallenge.easy-1/base.apk=org.teamsik.apps.hackingchallenge.easy
package:/data/app/org.teamsik.apps.hackingchallenge.hard-1/base.apk=org.teamsik.apps.hackingchallenge.hard
package:/data/app/sg.vp.owasp_mobile.omtg_android-kR0ovWl9eoU_yh0jPJ9caQ==/base.apk=sg.vp.owasp_mobile.omtg_android

This is the same as running adb shell pm path <app_package_id> on an app package ID:

$ adb shell pm path sg.vp.owasp_mobile.omtg_android
package:/data/app/sg.vp.owasp_mobile.omtg_android-kR0ovWl9eoU_yh0jPJ9caQ==/base.apk

Use frida-ps -Uai to get all apps (-a) currently installed (-i) on the connected USB device (-U):

$ frida-ps -Uai
  PID  Name                                      Identifier
-----  ----------------------------------------  ---------------------------------------
  766  Android System                            android
21228  Attack me if u can                        sg.vp.owasp_mobile.omtg_android
 4281  Termux                                    com.termux
    -  Uncrackable1                              sg.vantagepoint.uncrackable1

Note that this also shows the PID of the apps that are running at the moment. Take a note of the "Identifier" and the PID if any as you'll need them afterwards.