216.73.217.22

T1199: T1199

View on MITRE ATT&CK The MITRE Corporation · Published 16/12/2025 19:38 · Modified 27/03/2026 01:11

Essential information

MITRE technique ID
T1199
Confidence
100/100
Revoked
No
Published
16/12/2025 19:38
Modified
27/03/2026 01:11
Author / Source
The MITRE Corporation

Aliases

Trusted Relationship

Platforms

windows macos linux IaaS Office Suite Identity Provider SaaS

Description

Adversaries may breach or otherwise leverage organizations who have access to intended victims. Access through trusted third party relationship abuses an existing connection that may not be protected or receives less scrutiny than standard mechanisms of gaining access to a network. Organizations often grant elevated access to second or third-party external providers in order to allow them to manage internal systems as well as cloud-based environments. Some examples of these relationships include IT services contractors, managed security providers, infrastructure contractors (e.g. HVAC, elevators, physical security). The third-party provider's access may be intended to be limited to the infrastructure being maintained, but may exist on the same network as the rest of the enterprise. As such, [Valid Accounts](https://attack.mitre.org/techniques/T1078) used by the other party for access to internal network systems may be compromised and used.(Citation: CISA IT Service Providers) In Office 365 environments, organizations may grant Microsoft partners or resellers delegated administrator permissions. By compromising a partner or reseller account, an adversary may be able to leverage existing delegated administrator relationships or send new delegated administrator offers to clients in order to gain administrative control over the victim tenant.(Citation: Office 365 Delegated Administration)

Kill chain phases

Kill chainPhase
mitre-attack initial-access

Marking (TLP)

TLP:CLEAR Copyright 2015-2025, The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation.

External references

Related entities

Intrusion sets, malware, reports, vulnerabilities, indicators and other entities linked to this technique.