COMMON ATTACK PATTERN ENUMERATION AND CLASSIFICATIONMITRE canlı kaydı

CAPEC-504

Task Impersonation

An adversary, through a previously installed malicious application, impersonates an expected or routine task in an attempt to steal sensitive information or leverage a user's privileges.

Soyutlama

Standard

Tipik ciddiyet

High

Saldırı ihtimali

Medium

Saldırıyı anla

Bu saldırı kalıbı nedir?

An adversary, through a previously installed malicious application, impersonates an expected or routine task in an attempt to steal sensitive information or leverage a user's privileges.

Genişletilmiş açıklama

When impersonating an expected task, the adversary monitors the task list maintained by the operating system and waits for a specific legitimate task to become active. Once the task is detected, the malicious application launches a new task in the foreground that mimics the user interface of the legitimate task. At this point, the user thinks that they are interacting with the legitimate task that they started, but instead they are interacting with the malicious application. Once the adversary's goal is reached, the malicious application can exit, leaving the original trusted application visible and the appearance that nothing out of the ordinary has occurred. A second approach entails the adversary impersonating an unexpected task, but one that may often be spawned by legitimate background processes. For example, an adversary may randomly impersonate a system credential prompt, implying that a background process requires authentication for some purpose. The user, believing they are interacting with a legitimate task, enters their credentials or authorizes the use of their stored credentials, which the adversary then leverages for nefarious purposes. This type of attack is most often used to obtain sensitive information (e.g., credentials) from the user, but may also be used to ride the user's privileges.

Uygulama akışı

Saldırı adım adım nasıl ilerler?

1

Explore

Determine suitable tasks to exploit

Determine what tasks exist on the target system that may result in a user providing sensitive information.

Kullanılan teknikler

  • Determine what tasks prompt a user for their credentials.
  • Determine what tasks may prompt a user to authorize a process to execute with elevated privileges.
2

Exploit

Impersonate Task

Impersonate a legitimate task, either expected or unexpected, in an attempt to gain user credentials or to ride the user's privileges.

Kullanılan teknikler

  • Prompt a user for their credentials, while making the user believe the credential request is legitimate.
  • Prompt a user to authorize a task to run with elevated privileges, while making the user believe the request is legitimate.

Gereksinimler

Saldırının gerçekleşmesi için ne gerekir?

Ön koşullar

  • The adversary must already have access to the target system via some means.
  • A legitimate task must exist that an adversary can impersonate to glean credentials.
  • The user's privileges allow them to execute certain tasks with elevated privileges.

Gerekli beceri

  • Low: Once an adversary has gained access to the target system, impersonating a task is trivial.

Gerekli kaynak

  • Malware or some other means to initially comprise the target system.
  • Additional malware to impersonate a legitimate task.

Tespit

Saldırının göstergeleri nelerdir?

Credential or permission elevation prompts that appear illegitimate or unexpected.

Etki

Başarılı saldırı neye yol açar?

Gain Privileges

Etkilenen alanlar: Access Control, Authentication

Savunma

Nasıl önlenir ve etkisi azaltılır?

1
The only known mitigation to this attack is to avoid installing the malicious application on the device. However, to impersonate a running task the malicious application does need the GET_TASKS permission to be able to query the task list, and being suspicious of applications with that permission can help.

Gerçek dünya

MITRE örnek olayları

Örnek olay 1Detay
An adversary monitors the system task list for Microsoft Outlook in an attempt to determine when the application may prompt the user to enter their credentials to view encrypted email. Once the task is executed, the adversary impersonates the credential prompt to obtain the user's Microsoft Outlook encryption credentials. These credentials can then be leveraged by the adversary to read a user's encrypted email.
Örnek olay 2Detay
An adversary prompts a user to authorize an elevation of privileges, implying that a background task needs additional permissions to execute. The user accepts the privilege elevation, allowing the adversary to execute additional malware or tasks with the user's privileges.
CAPEC-504: Task Impersonation — DayBreach Saldırı Sözlüğü · DayBreach