IMSI Catcher Systems & Devices
An IMSI catcher, or cell-site simulator, is a device that mimics legitimate cell towers to intercept mobile phone communications by capturing the International Mobile Subscriber Identity (IMSI) of nearby devices. An IMSI catcher system, equipped with specialized software facilitates the monitoring and tracking of cellular activities. A drone IMSI catcher enhances the reach and mobility of surveillance operations collecting data over wide areas to assist in search and rescue and law enforcement operations.What is an IMSI Catcher?
An IMSI Catcher is a surveillance device that mimics a legitimate cell tower to intercept mobile phone communications. By posing as a fake cell tower, it tricks nearby mobile devices into connecting with it, allowing the operator to capture the International Mobile Subscriber Identity (IMSI) and other key information. Many systems can also detect IMEI (international mobile equipment identity) numbers.
These systems are used to monitor, track, and, in some cases, intercept the communications of mobile devices without the knowledge or consent of the user. IMSI Catchers are often employed by law enforcement and intelligence agencies for security purposes.
Typically based on SDR (software-defined radio) technology, they may work with 2G, 3G, 4G or 5G networks. Once mobile devices are connected, the catcher system may provide a range of additional functionality, including access to GPS location, denial of service, battery draining, network changing, and SMS sending.
IMSI Catcher Applications for Drones & Unmanned Systems
SDR IMSI catcher devices can be connected to UAVs (unmanned aerial vehicles) and drones for the purposes of security and search and rescue. They can be embedded into relatively low-SWaP (size, weight and power) payloads and thus can be carried by a wide range of UAS (unmanned aerial system) platforms.
Search and Rescue & Disaster Relief
Ideal for search and rescue drones an IMSI catcher system attached to a drone or UAS can:
- Cover vast areas in a short time when searching for survivors and missing persons
- Typically can be used to detect mobile phones even in thick vegetation and under snow
- Turn mobile phones into emergency beacons that can guide rescue teams
- Be used to establish direct communications between rescuers and victims
Security & Counter-Terrorism
A drone-mounted IMSI locator can also be used to track the mobile phones of suspects and identify patterns of activity. They are quick to deploy and provide a relatively quiet surveillance capability, plus on drones, they can reach areas that would be difficult for a strike team or vehicle to access.