DEEP INSERT – Card Skimmer Research

This report documents a hardware teardown and analysis of an ATM insert card skimmer, detailing its circuitry (MCP6142 op-amp, PIC18F26K20 microcontroller, AT45DB321E 32-Mbit flash), power considerations, and USB/FTDI interface that enabled recovery of an encrypted ~28.4MB WAV file containing magstripe captures; it maps the device to a commercial ASR-009 analog audio recorder used for card data theft, explains magstripe data formats and reading methods, surveys insert/deep-insert skimmer variants and market sources, and provides tooling references for data extraction, focusing on skimming TTPs rather than a specific intrusion or breach.