Modify Authentication Process: Аутентификация на сетевых устройствах
Other sub-techniques of Modify Authentication Process (7)
Adversaries may use Patch System Image to hard code a password in the operating system, thus bypassing of native authentication mechanisms for local accounts on network devices. Modify System Image may include implanted code to the operating system for network devices to provide access for adversaries using a specific password. The modification includes a specific password which is implanted in the operating system image via the patch. Upon authentication attempts, the inserted code will first check to see if the user input is the password. If so, access is granted. Otherwise, the implanted code will pass the credentials on for verification of potentially valid credentials.(Citation: Mandiant - Synful Knock)
Примеры процедур |
|
| Название | Описание |
|---|---|
| SYNful Knock |
SYNful Knock has the capability to add its own custom backdoor password when it modifies the operating system of the affected network device.(Citation: Mandiant - Synful Knock) |
Контрмеры |
|
| Контрмера | Описание |
|---|---|
| Privileged Account Management |
Manage the creation, modification, use, and permissions associated to privileged accounts, including SYSTEM and root. |
| Multi-factor Authentication |
Use two or more pieces of evidence to authenticate to a system; such as username and password in addition to a token from a physical smart card or token generator. |
Обнаружение
Consider verifying the checksum of the operating system file and verifying the image of the operating system in memory.(Citation: Cisco IOS Software Integrity Assurance - Image File Verification)(Citation: Cisco IOS Software Integrity Assurance - Run-Time Memory Verification) Detection of this behavior may be difficult, detection efforts may be focused on closely related adversary behaviors, such as Modify System Image.
Ссылки
- Cisco. (n.d.). Cisco IOS Software Integrity Assurance - Cisco IOS Run-Time Memory Integrity Verification. Retrieved October 19, 2020.
- Cisco. (n.d.). Cisco IOS Software Integrity Assurance - Cisco IOS Image File Verification. Retrieved October 19, 2020.
- Bill Hau, Tony Lee, Josh Homan. (2015, September 15). SYNful Knock - A Cisco router implant - Part I. Retrieved October 19, 2020.
- Cisco. (n.d.). Cisco IOS Software Integrity Assurance - TACACS. Retrieved October 19, 2020.
Связанные риски
Каталоги
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