FlexiSpy is sophisticated surveillanceware for iOS and Android. Publicly-available, comprehensive analysis has only been found for the Android version.[1][2]

FlexiSpy markets itself as a parental control and employee monitoring application.[3]

ID: S0408
Type: TOOL
Platforms: Android
Contributors: Emily Ratliff, IBM
Version: 1.0
Created: 04 September 2019
Last Modified: 14 October 2019

Techniques Used

Domain ID Name Use
Mobile T1435 Access Calendar Entries

FlexiSpy can collect the device calendars.[2]

Mobile T1432 Access Contact List

FlexiSpy can collect device contacts.[2]

Mobile T1409 Access Stored Application Data

FlexiSpy uses a FileObserver object to monitor the Skype and WeChat database file and shared preferences to retrieve chat messages, account information, and profile pictures of the account owner and chat participants. FlexiSpy can also spy on popular applications, including Facebook, Hangouts, Hike, Instagram, Kik, Line, QQ, Snapchat, Telegram, Tinder, Viber, and WhatsApp.[1]

Mobile T1418 Application Discovery

FlexiSpy can retrieve a list of installed applications.[4]

Mobile T1402 Broadcast Receivers

FlexiSpy uses root access to establish reboot hooks to re-install the application from /data/misc/adn.[1] At boot, FlexiSpy spawns daemons for process monitoring, call monitoring, call managing, and system.[1]

Mobile T1429 Capture Audio

FlexiSpy can record both incoming and outgoing phone calls, as well as microphone audio.[2]

Mobile T1512 Capture Camera

FlexiSpy can record video.[2]

Mobile T1412 Capture SMS Messages

FlexiSpy can intercept SMS and MMS messages as well as monitor messages for keywords.[2][4]

Mobile T1533 Data from Local System

FlexiSpy can monitor device photos and can also access browser history and bookmarks.[4]

Mobile T1447 Delete Device Data

FlexiSpy can delete data from a compromised device.[2]

Mobile T1417 Input Capture

FlexiSpy can record keystrokes and analyze them for keywords.[4]

Mobile T1430 Location Tracking

FlexiSpy can track the device's location.[2]

Mobile T1400 Modify System Partition

FlexiSpy installs boot hooks into /system/su.d.[1]

Mobile T1507 Network Information Discovery

FlexiSpy can collect a list of known Wi-Fi access points.[4]

Mobile T1406 Obfuscated Files or Information

FlexiSpy encrypts its configuration file using AES.[1]

Mobile T1513 Screen Capture

FlexiSpy can take screenshots of other applications.[4]

Mobile T1508 Suppress Application Icon

FlexiSpy is capable of hiding SuperSU's icon if it is installed and visible.[1] FlexiSpy can also hide its own icon to make detection and the uninstallation process more difficult.[4]

Mobile T1509 Uncommonly Used Port

FlexiSpy can communicate with the command and control server over ports 12512 and 12514.[1]