# Proxmark3 v4.16717 Released

> The Seven release adds an lf em 4x70 brute command, NTAG213TT tamper support, Windows TCP connections, and WSL2 usability fixes.

_2023-06-26_

This is the v4.16717 "Seven" release of the Iceman fork of the Proxmark3 firmware and client. Built from the commits since v4.16191, it focuses on new low-frequency brute forcing, tamper-tag support, Windows networking, and a wide range of stability and build fixes.

## Highlights
- Added an `lf em 4x70 brute` command to brute force partial keys on EM4x70 tags, expanding the Proxmark3's low-frequency attack toolkit.
- Added support for the NTAG213TT tamper feature, so the client can read and work with the tamper-detection function of these tags.
- Added TCP connection support on Windows by reusing the BSD-style sockets code via Winsock2, letting Windows users connect to networked Proxmark3 devices.
- Improved WSL2 (Kali Linux) usability: udev rules now assign group ownership and permissions, double-enumeration is prevented, and WSL detection is more robust with case-insensitive matching.
- Added a `data num` command that converts between decimal, hex and binary using big integers (no hex-to-dec size limits) and flags prime numbers.
- Added bruteforce functionality for HID facility codes and XOR key extraction for Guardall G-Prox II cards.
- Updated the USB serial number to use the SPI flash unique ID and enabled the serial number from flash in the bootrom, improving device identification.
- Fixed an infinite loop in `SpinDelayUs()`/`SpinDelayUsPrecision()`, a buffer overflow in `AppendGraph()`, and `HF15` write/read when a UID is passed as an argument; also fixed the client build on Android.

## Contributors
This release landed thanks to [@iceman1001](https://github.com/iceman1001), [@wh201906](https://github.com/wh201906), [@henrygab](https://github.com/henrygab), [@AloneLiberty](https://github.com/AloneLiberty), [@orensbruli](https://github.com/orensbruli), [@phaseloop](https://github.com/phaseloop), [@penegui](https://github.com/penegui), [@mjaksn](https://github.com/mjaksn), [@colonelborkmundus](https://github.com/colonelborkmundus), [@natesales](https://github.com/natesales) and others.

Read the [full changelog and downloads on GitHub](https://github.com/RfidResearchGroup/proxmark3/releases/tag/v4.16717).