Исследование учетных записей
Sub-techniques (4)
Adversaries may attempt to get a listing of valid accounts, usernames, or email addresses on a system or within a compromised environment. This information can help adversaries determine which accounts exist, which can aid in follow-on behavior such as brute-forcing, spear-phishing attacks, or account takeovers (e.g., Valid Accounts). Adversaries may use several methods to enumerate accounts, including abuse of existing tools, built-in commands, and potential misconfigurations that leak account names and roles or permissions in the targeted environment. For examples, cloud environments typically provide easily accessible interfaces to obtain user lists.(Citation: AWS List Users)(Citation: Google Cloud - IAM Servie Accounts List API) On hosts, adversaries can use default PowerShell and other command line functionality to identify accounts. Information about email addresses and accounts may also be extracted by searching an infected system’s files.
Примеры процедур |
|
Название | Описание |
---|---|
Aquatic Panda |
Aquatic Panda used the |
APT29 |
APT29 obtained a list of users and their roles from an Exchange server using |
ShimRatReporter |
ShimRatReporter listed all non-privileged and privileged accounts available on the machine.(Citation: FOX-IT May 2016 Mofang) |
Woody RAT |
Woody RAT can identify administrator accounts on an infected machine.(Citation: MalwareBytes WoodyRAT Aug 2022) |
UNC2452 |
UNC2452 obtained a list of users and their roles from an Exchange server using |
XCSSET |
XCSSET attempts to discover accounts from various locations such as a user's Evernote, AppleID, Telegram, Skype, and WeChat data.(Citation: trendmicro xcsset xcode project 2020) |
During the SolarWinds Compromise, APT29 obtained a list of users and their roles from an Exchange server using `Get-ManagementRoleAssignment`.(Citation: Volexity SolarWinds) |
|
FIN13 |
FIN13 has enumerated all users and their roles from a victim's main treasury system.(Citation: Mandiant FIN13 Aug 2022) |
Контрмеры |
|
Контрмера | Описание |
---|---|
Account Discovery Mitigation |
Prevent administrator accounts from being enumerated when an application is elevating through UAC since it can lead to the disclosure of account names. The Registry key is located |
Operating System Configuration |
Make configuration changes related to the operating system or a common feature of the operating system that result in system hardening against techniques. |
User Account Management |
Manage the creation, modification, use, and permissions associated to user accounts. |
Обнаружение
System and network discovery techniques normally occur throughout an operation as an adversary learns the environment. Data and events should not be viewed in isolation, but as part of a chain of behavior that could lead to other activities, such as Lateral Movement, based on the information obtained.
Monitor processes and command-line arguments for actions that could be taken to gather system and network information. Remote access tools with built-in features may interact directly with the Windows API to gather information. Information may also be acquired through Windows system management tools such as Windows Management Instrumentation and PowerShell.
Monitor for processes that can be used to enumerate user accounts, such as net.exe
and net1.exe
, especially when executed in quick succession.(Citation: Elastic - Koadiac Detection with EQL)
Ссылки
- Cash, D. et al. (2020, December 14). Dark Halo Leverages SolarWinds Compromise to Breach Organizations. Retrieved December 29, 2020.
- Stepanic, D.. (2020, January 13). Embracing offensive tooling: Building detections against Koadic using EQL. Retrieved November 30, 2020.
- Google. (2020, June 23). gcloud iam service-accounts list. Retrieved August 4, 2020.
- Amazon. (n.d.). List Users. Retrieved August 11, 2020.
- CrowdStrike. (2023). 2022 Falcon OverWatch Threat Hunting Report. Retrieved May 20, 2024.
- Yonathan Klijnsma. (2016, May 17). Mofang: A politically motivated information stealing adversary. Retrieved May 12, 2020.
- UCF. (n.d.). The system must require username and password to elevate a running application.. Retrieved December 18, 2017.
- MalwareBytes Threat Intelligence Team. (2022, August 3). Woody RAT: A new feature-rich malware spotted in the wild. Retrieved December 6, 2022.
- Mac Threat Response, Mobile Research Team. (2020, August 13). The XCSSET Malware: Inserts Malicious Code Into Xcode Projects, Performs UXSS Backdoor Planting in Safari, and Leverages Two Zero-day Exploits. Retrieved October 5, 2021.
- Ta, V., et al. (2022, August 8). FIN13: A Cybercriminal Threat Actor Focused on Mexico. Retrieved February 9, 2023.
Связанные риски
Каталоги
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