Куда я попал?
SECURITM это SGRC система, ? автоматизирующая процессы в службах информационной безопасности. SECURITM помогает построить и управлять ИСПДн, КИИ, ГИС, СМИБ/СУИБ, банковскими системами защиты.
А еще SECURITM это место для обмена опытом и наработками для служб безопасности.

Загрузка раньше ОС

Adversaries may abuse Pre-OS Boot mechanisms as a way to establish persistence on a system. During the booting process of a computer, firmware and various startup services are loaded before the operating system. These programs control flow of execution before the operating system takes control.(Citation: Wikipedia Booting) Adversaries may overwrite data in boot drivers or firmware such as BIOS (Basic Input/Output System) and The Unified Extensible Firmware Interface (UEFI) to persist on systems at a layer below the operating system. This can be particularly difficult to detect as malware at this level will not be detected by host software-based defenses.

ID: T1542
Суб-техники:  .001 .002 .003 .004 .005
Тактика(-и): Defense Evasion, Persistence
Платформы: Linux, macOS, Network, Windows
Источники данных: Command: Command Execution, Drive: Drive Modification, Driver: Driver Metadata, Firmware: Firmware Modification, Network Traffic: Network Connection Creation, Process: OS API Execution
Версия: 1.1
Дата создания: 13 Nov 2019
Последнее изменение: 19 Apr 2022

Контрмеры

Контрмера Описание
Update Software

Perform regular software updates to mitigate exploitation risk.

Privileged Account Management

Manage the creation, modification, use, and permissions associated to privileged accounts, including SYSTEM and root.

Boot Integrity

Use secure methods to boot a system and verify the integrity of the operating system and loading mechanisms.

Обнаружение

Perform integrity checking on pre-OS boot mechanisms that can be manipulated for malicious purposes. Take snapshots of boot records and firmware and compare against known good images. Log changes to boot records, BIOS, and EFI, which can be performed by API calls, and compare against known good behavior and patching. Disk check, forensic utilities, and data from device drivers (i.e. processes and API calls) may reveal anomalies that warrant deeper investigation.(Citation: ITWorld Hard Disk Health Dec 2014)

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