GSM Assessment Toolkit – GAT

GAT is an evaluation framework for assessing security-related aspects of mobile networks based on the GSM standard.

The framework mainly relies on gr-gsm for the processing of GSM-related information.

More information can be found in the wiki

Feature List

• Capturing transmissions, currently only using RTL-SDR. Support for UHD coming soon.
• Scanning for base stations, currently only using RTL-SDR. Support for UHD coming soon.
• Decoding captured transmissions (Control channels, voice channels).
• A5/1 key reconstruction using Kraken.
• Sending SMS (regular, silent and others) via GAT-App
• Performing HLR lookups. Currently only hlrlookups.com supported.
• TMSI (and some IMSIs) sniffing / extraction
• Subscriber identification (TMSI – MSISDN correlation)
• Analysis of captured transmissions (e.g. Immediate Assignments, Cipher Mode Commands, used encryption). More coming soon.
• Utilities: Starting a preconfigured Wireshark, info about and conversion of ARFCN and frequencies, manipulation of burst-files.