Outlook Forms (T1137.003)

Tactic: Persistence

Tactics: Persistence
Platforms: Windows, Office Suite
Reference: attack.mitre.org/techniques/T1137.003

Description

Adversaries may abuse Microsoft Outlook forms to obtain persistence on a compromised system. Outlook forms are used as templates for presentation and functionality in Outlook messages. Custom Outlook forms can be created that will execute code when a specifically crafted email is sent by an adversary utilizing the same custom Outlook form.(Citation: SensePost Outlook Forms)

Once malicious forms have been added to the user’s mailbox, they will be loaded when Outlook is started. Malicious forms will execute when an adversary sends a specifically crafted email to the user.(Citation: SensePost Outlook Forms)

How GTK Cyber trains on this

GTK Cyber's Threat Hunting with Data Science course teaches you to build machine-learning detections for techniques like this across the MITRE ATT&CK framework, including the Persistence tactic this technique falls under. Practitioner-led, focused on real detections, not memorizing technique IDs.

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