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InformationalSplunk security contentBhavin Patel +1

Detect Outlook exe writing a zip file

The following analytic identifies the execution of `outlook.exe` writing a `.zip` file to the disk. It leverages data from the Endpoint data model, specifically monitoring process and filesystem activities. This…

Description

The following analytic identifies the execution of `outlook.exe` writing a `.zip` file to the disk. It leverages data from the Endpoint data model, specifically monitoring process and filesystem activities. This behavior can be significant as it may indicate the use of Outlook to deliver malicious payloads or exfiltrate data via compressed files. If confirmed malicious, this activity could lead to unauthorized data access, data exfiltration, or the delivery of malware, potentially compromising the security of the affected system and network.

Detection logic

Detection requirements

Platform
LinuxmacOSWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
sysmon_eventid_1_and_sysmon_eventid_11

Known benign triggers

  • It is not uncommon for outlook to write legitimate zip files to the disk.

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