T1114.001: T1114.001
Essential information
- MITRE technique ID
T1114.001- Confidence
- 100/100
- Revoked
- No
- Published
- 19/02/2020 19:46
- Modified
- 27/03/2026 01:08
- Author / Source
- The MITRE Corporation
Aliases
Local Email Collection
Platforms
windows
Description
Adversaries may target user email on local systems to collect sensitive information. Files containing email data can be acquired from a user’s local system, such as Outlook storage or cache files.
Outlook stores data locally in offline data files with an extension of .ost. Outlook 2010 and later supports .ost file sizes up to 50GB, while earlier versions of Outlook support up to 20GB.(Citation: Outlook File Sizes) IMAP accounts in Outlook 2013 (and earlier) and POP accounts use Outlook Data Files (.pst) as opposed to .ost, whereas IMAP accounts in Outlook 2016 (and later) use .ost files. Both types of Outlook data files are typically stored in `C:\Users\<username>\Documents\Outlook Files` or `C:\Users\<username>\AppData\Local\Microsoft\Outlook`.(Citation: Microsoft Outlook Files)
Kill chain phases
| Kill chain | Phase |
|---|---|
| mitre-attack | collection |
Marking (TLP)
TLP:GREEN Copyright 2015-2025, The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation.