Potential CVE-2023-36884 Exploitation Dropped File

Description

Detects a specific file being created in the recent folder of Office. These files have been seen being dropped during potential exploitations of CVE-2023-36884

Query · sigma

selection:
  TargetFilename|startswith: C:\Users\
  TargetFilename|contains: \AppData\Roaming\Microsoft\Office\Recent\
  TargetFilename|endswith: \file001.url
condition: selection

Known false positives

  • Unknown
Raw source Potential CVE-2023-36884 Exploitation Dropped File · Sigma
Esc
Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential CVE-2023-36884 Exploitation Dropped File
id: 8023d3a2-dcdc-44da-8fa9-5c7906e55b38
status: test
description: Detects a specific file being created in the recent folder of Office. These files have been seen being dropped during potential exploitations of CVE-2023-36884
references:
    - https://blogs.blackberry.com/en/2023/07/romcom-targets-ukraine-nato-membership-talks-at-nato-summit
    - https://twitter.com/wdormann/status/1679184475677130755
    - https://twitter.com/r00tbsd/status/1679042071477338114/photo/1
author: Nasreddine Bencherchali (Nextron Systems), X__Junior (Nextron Systems)
date: 2023-07-13
tags:
    - attack.persistence
    - cve.2023-36884
    - detection.emerging-threats
    - attack.stealth
logsource:
    category: file_event
    product: windows
detection:
    selection:
        TargetFilename|startswith: 'C:\Users\'
        TargetFilename|contains: '\AppData\Roaming\Microsoft\Office\Recent\'
        TargetFilename|endswith: '\file001.url'
    condition: selection
falsepositives:
    - Unknown
level: medium

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.