Osmocom SIMtrace

https://osmocom.org/projects/simtrace/wiki/SIMtrace

https://git.osmocom.org/simtrace/about/

It works by utilizing the T=0 capable USART of the USB-attached AT91SAM7 microcontroller.

The USART passively receives the bytes as they are exchanged on the ISO 7816-3 / TS 11.11 interface between SIM and phone. The received bytes are sent via USB to the PC, where a program called simtrace on the PC gathers data from the USB device, parses the APDUs and forwards them via GSMTAP to the wireshark protocol analyzer.

Features

• Completely passive scanner
• RST and ATR detection
• Auto-bauding with PPS / PTS support
• Segmentation of APDUs

SIMtrace can be used to monitor the ME-SIM communication, but also emulate a phone or SIM, or be MitM.

While the hardware supports all these modes, only the monitoring aspect has been implemented in software.