Potential Persistence Via Outlook Form

Severity: high
Author: Tobias Michalski (Nextron Systems)
Source: upstream

Detects the creation of a new Outlook form which can contain malicious code

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1137.003` Office Application Startup: Outlook Forms

Event coverage

Provider	Event ID	Title
Sysmon	11	FileCreate

Stages and Predicates

Stage 1: `selection`

or:
TargetFilename|contains: '\AppData\Local\Microsoft\FORMS\IPM'
TargetFilename|contains: '\Local Settings\Application Data\Microsoft\Forms'
Image|endswith: '\outlook.exe'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.