LoFP / benign files can trigger signatures in the built-in virus protection

Techniques

• T1080

Sample rules

SharePoint Malware File Upload

• source: elastic
• technicques:
  • T1080

Description

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.

Detection logic

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

OneDrive Malware File Upload

• source: elastic
• technicques:
  • T1080

Description

Identifies the occurence of files uploaded to OneDrive 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 opportunity to gain initial access to other endpoints in the environment.

Detection logic

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