Adversaries may establish persistence and/or elevate privileges using system mechanisms that trigger execution based on specific events. Various operating systems have means to monitor and subscribe to events such as logons or other user activity such as running specific applications/binaries. Cloud environments may also support various functions and services that monitor and can be invoked in response to specific cloud events.(Citation: Backdooring an AWS account)(Citation: Varonis Power Automate Data Exfiltration)(Citation: Microsoft DART Case Report 001)
Adversaries may abuse these mechanisms as a means of maintaining persistent access to a victim via repeatedly executing malicious code. After gaining access to a victim system, adversaries may create/modify event triggers to point to malicious content that will be executed whenever the event trigger is invoked.(Citation: FireEye WMI 2015)(Citation: Malware Persistence on OS X)(Citation: amnesia malware)
Since the execution can be proxied by an account with higher permissions, such as SYSTEM or service accounts, an adversary may be able to abuse these triggered execution mechanisms to escalate their privileges.
View in MITRE ATT&CK®| Capability ID | Capability Description | Mapping Type | ATT&CK ID | ATT&CK Name | Notes |
|---|---|---|---|---|---|
| IAM-16 | Authorization Mechanisms | mitigates | T1546 | Event Triggered Execution |
Comments
This control requires both CSP and CSC to independently enforce formal approval processes for user access, implement dynamic and explicit authorization mechanisms. The guidance focuses on implementing technical measures to verify authorization and prevent unauthorized access and execution.
References
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| IAM-11 | CSCs Approval for Agreed Privileged Access Roles | mitigates | T1546 | Event Triggered Execution |
Comments
This control requires both CSP and CSC to collaboratively identify high-risk data and privileged roles, enforce formal CSC approval workflows for CSP user access, use secure PAM systems, and implement comprehensive monitoring and reporting to ensure privileged access to sensitive CSC data is tightly controlled and traceable.
Privileged Account Management focuses on implementing policies, controls, and tools to securely manage privileged accounts (e.g., SYSTEM, root, or administrative accounts). This includes restricting access, limiting the scope of permissions, monitoring privileged account usage, and ensuring accountability through logging and auditing.This mitigation can be implemented through
account permissions and roles, PAM solutions, or just-In-Time access.
References
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| IAM-10 | Management of Privileged Access Roles | mitigates | T1546 | Event Triggered Execution |
Comments
This control requires both CSP and CSC to independently manage privileged access by enforcing time-bound approvals, formal request and justification processes, automated revocation, session restrictions, credential vaulting and rotation, continuous monitoring, and periodic reviews, ensuring privileged access is tightly controlled, monitored, and limited to only what is necessary for specific roles and timeframes.
Privileged Account Management focuses on implementing policies, controls, and tools to securely manage privileged accounts (e.g., SYSTEM, root, or administrative accounts). This includes restricting access, limiting the scope of permissions, monitoring privileged account usage, and ensuring accountability through logging and auditing.This mitigation can be implemented through
account permissions and roles, PAM solutions, or just-In-Time access.
References
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| IAM-09 | Segregation of Privileged Access Roles | mitigates | T1546 | Event Triggered Execution |
Comments
This control describes the periodic, risk-based, and reviews of privileged accounts and high-risk access configurations, ensuring these are accounts are managed and scrutinized to prevent unauthorized access or excessive privileges.
Privileged Account Management focuses on implementing policies, controls, and tools to securely manage privileged accounts (e.g., SYSTEM, root, or administrative accounts). This includes restricting access, limiting the scope of permissions, monitoring privileged account usage, and ensuring accountability through logging and auditing.This mitigation can be implemented through
account permissions and roles, PAM solutions, or just-In-Time access.
References
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| AIS-06 | Automated Secure Application Deployment | mitigates | T1546 | Event Triggered Execution |
Comments
This control applies to the secure deployments of applications and emphasizes the prevention of misconfigurations and malicious deployment activities. Adversaries may establish persistence and/or elevate privileges using system mechanisms that trigger execution based on specific events. Cloud environments may also support various functions and services that monitor and can be invoked in response to specific cloud events. Secure deployment templates and tools that limit the modification of cloud resources that may be abused for persistence, such as functions and workflows monitoring cloud events, could mitigate this technique.
References
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