T1137.005: Outlook Rules
Summary
Adversaries may abuse Microsoft Outlook rules to obtain persistence on a compromised system. Outlook rules allow a user to define automated behavior to manage email messages. A benign rule might, for example, automatically move an email to a particular folder in Outlook if it contains specific words from a specific sender. Malicious Outlook rules can be created that can trigger code execution when an adversary sends a specifically crafted email to that user.(Citation: SilentBreak Outlook Rules) Once malicious rules have been added to the user’s mailbox, they will be loaded when Outlook is started. Malicious rules will execute when an adversary sends a specifically crafted email to the user.(Citation: SilentBreak Outlook Rules)
Source Attribution
Source: MITRE ATT&CK · Confidence: high
Platforms
- Windows
- Office Suite
Tactic
persistence
References
- https://attack.mitre.org/techniques/T1137/005
- https://blog.compass-security.com/2018/09/hidden-inbox-rules-in-microsoft-exchange/
- https://docs.microsoft.com/en-us/office365/securitycompliance/detect-and-remediate-outlook-rules-forms-attack
- https://silentbreaksecurity.com/malicious-outlook-rules/
- https://github.com/sensepost/notruler