Suspicious File Write to SharePoint Layouts Directory

sigmaDRL-1.1from SigmaHQ/sigma

Detects suspicious file writes to SharePoint layouts directory which could indicate webshell activity or post-exploitation. This behavior has been observed in the exploitation of SharePoint vulnerabilities such as CVE-2025-49704, CVE-2025-49706 or CVE-2025-53770.

quality82

fp risk—

forks0

ATT&CK techniques

T1190 T1505.003

rule sourcelocked

title: ████████████████████████
id: ████████-████-████-████-████████████
status: ██████████
description: ██████████████████████████████████████████
             ████████████████████████████████████████
author: ████████
tags:
  - attack.████
  - attack.████
logsource:
  product: ████████
  category: ████████████
detection:
  selection:
    Image|endswith: '████████████████'
    CommandLine|contains:
      - '████████████████████████'
      - '████████████████████████'
      - '██████████████████'
  condition: selection
level: ████████
falsepositives:
  - ████████████████████

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