Загрузка раньше ОС
Sub-techniques (5)
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.
Контрмеры |
|
| Контрмера | Описание |
|---|---|
| Limit Access to Resource Over Network |
Prevent access to file shares, remote access to systems, unnecessary services. Mechanisms to limit access may include use of network concentrators, RDP gateways, etc. |
| Audit |
Perform audits or scans of systems, permissions, insecure software, insecure configurations, etc. to identify potential weaknesses. |
| 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)
Ссылки
- Wikipedia. (n.d.). Booting. Retrieved November 13, 2019.
- Pinola, M. (2014, December 14). 3 tools to check your hard drive's health and make sure it's not already dying on you. Retrieved October 2, 2018.
- Microsoft. (n.d.). Secure the Windows 10 boot process. Retrieved April 23, 2020.
- Trusted Computing Group. (2008, April 29). Trusted Platform Module (TPM) Summary. Retrieved June 8, 2016.
Связанные риски
Каталоги
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