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THE DAILY INDEX

Technology, AI, software, security, crypto and business

ATTACKS & VULNERABILITIES

TLDR InfoSec

ETHEREUM PRIVATE KEY STEALER ON PYPI DOWNLOADED OVER 1K TIMES

The PyPI package "set-utils" targets Ethereum developers using the eth-account library. The package hooks the from_key and from_mnewmonic() functions in the ethereum package to intercept private keys, encrypt them, and upload them to the Polygon blockchain. Polygon transactions have very low processing fees, no rate limits, and free public RPC endpoints, enabling attackers to retrieve the keys at any point without requiring their own infrastructure.

UNDOCUMENTED COMMANDS FOUND IN BLUETOOTH CHIP USED BY A BILLION DEVICES

Researchers from Tarlogic Security discovered 29 undocumented commands in the firmware of the ESP32 Bluetooth device. The commands could allow for memory manipulation, MAC address spoofing, and LMP/LLCP packet injection. While the commands could open the door for supply chain attacks, a more realistic threat would be a physical attacker establishing persistence and performing further attacks through the ESP32's memory.

REVERSING SAMSUNG'S H-ARX HYPERVISOR FRAMEWORK

Mobile devices lead security with defense-in-depth strategies, moving sensitive data from untrusted kernels to higher trust levels like hypervisors and secure enclaves. Samsung's Real-time Kernel Protection (RKP), part of Knox on Exynos devices, uses H-Arx Hypervisor to protect the kernel. The post discusses how to reverse the hypervisor framework, which includes a common core (harx.bin) and loadable plug-ins in a proprietary uH format.

ABUSING VBS ENCLAVES TO CREATE EVASIVE MALWARE

VBS enclaves allow a Windows user to run code in an isolated memory region that even the “standard” kernel cannot access. This presents an appealing attack surface for malware, as VBS malware would be invisible to EDR running in the standard kernel, but the VBS enclave code must be signed by Microsoft. This post explores bypassing the Microsoft checks by abusing debuggable enclave modules or exploiting vulnerable enclaves.

NOT LOST IN TRANSLATION: ROSETTA 2 ARTIFACTS IN MACOS INTRUSIONS

Rosetta 2 technology creates AOT files on Apple Silicon Macs, essential for analyzing macOS intrusions, even if malware is erased. Mandiant found that sophisticated actors target cryptocurrency firms with x86-64 malware due to its wider compatibility and lenient execution policies compared to ARM64. These AOT files, stored in protected cache directories, can uncover critical intrusion evidence through timestamps, execution patterns, and binary features, even after deleting malicious files.

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