INITIALIZING_ACCESS_PROTOCOL...
Query the connected device and initialize the Qualcomm Diagnostic (Diag) interface. This command configures the device's diagnostic logging mask, sending specific subsystem codes to enable the modem's raw L1/L2/L3 signaling transmission logs over the USB serial interface. The utility checks the baseband configuration to ensure diagnostic logs are unlocked and ready to stream.
Activate diagnostic packet streaming. The tool captures incoming cellular frames (such as GSM, UMTS, LTE, or 5G NAS/RRC messages) in real time directly from the baseband processor. Captured frames are automatically encapsulated in standard GSMTAP headers to preserve signaling metadata, including signal strength, timing offsets, and logical channel info. This stream can be compared with downlink captures obtained via passive sniffing frameworks like GR-GSM.
Export diagnostic records to a PCAP file and run analysis. Once the stream is saved, you can parse the network signals (like System Information Blocks, paging requests, or connection setups) or open the file in Wireshark for detailed protocol dissection. This step allows researchers to audit baseband configurations and detect protocol-level anomalies.
Accessing the Qualcomm Diag interface and extracting raw baseband signaling frames requires host administrative privileges and direct USB diagnostic port access. The resulting PCAP files contain sensitive plaintext identifiers — including IMSIs, IMEIs, and TMSIs — that uniquely identify subscribers and devices. Treat all captured diagnostic logs as confidential research material and never publish or share raw captures that contain live subscriber identity data.
If your session captures encrypted NAS payloads and you apply session keys to decrypt them, the plaintext may reveal location update messages, authentication responses, and connection setup parameters for real subscribers on live networks. Conduct decryption only on captures sourced from your own authorized test devices. All Diag-based research must target only equipment you own or have explicit written authorization to test.
You've executed the basic steps for QCSuper. The TelcoSec Academy offers full hands-on simulation labs, baseband source code auditing, and deep cellular signal processing certification courses.