SharePoint Malware File Upload

Last updated 6 months ago on 2025-01-15
Created 3 years ago on 2022-01-10

About

Identifies the occurence of files uploaded to SharePoint being detected as Malware by the file scanning engine. Attackers can use File Sharing and Organization Repositories to spread laterally within the company and amplify their access. Users can inadvertently share these files without knowing their maliciousness, giving adversaries opportunities to gain initial access to other endpoints in the environment.
Tags
Domain: CloudData Source: Microsoft 365Tactic: Lateral MovementLanguage: kuery
Severity
high
Risk Score
73
MITRE ATT&CK™

Lateral Movement (TA0008)(opens in a new tab or window)

False Positive Examples
Benign files can trigger signatures in the built-in virus protection
License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
filebeat-*logs-o365*
Related Integrations

o365(opens in a new tab or window)

Query
event.dataset:o365.audit and event.provider:SharePoint and event.code:SharePointFileOperation and event.action:FileMalwareDetected

Install detection rules in Elastic Security

Detect SharePoint Malware File Upload in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).