Potential CVE-2023-36884 Exploitation - Share Access

title: Potential CVE-2023-36884 Exploitation - Share Access
id: 3df95076-9e78-4e63-accb-16699c3b74f8
status: test
description: Detects access to a file share with a naming schema seen being used during exploitation of CVE-2023-36884
references:
    - https://blogs.blackberry.com/en/2023/07/romcom-targets-ukraine-nato-membership-talks-at-nato-summit
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-07-13
tags:
    - attack.command-and-control
    - cve.2023-36884
    - detection.emerging-threats
logsource:
    product: windows
    service: security
    definition: 'The advanced audit policy setting "Object Access > Audit File Share" must be configured for Success/Failure'
detection:
    selection_eid:
        EventID: 5140
    selection_share_name:
        ShareName|contains: '\MSHTML_C7\'
        ShareName|re: '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
    selection_share_path:
        ShareLocalPath|contains: '\MSHTML_C7\'
        ShareLocalPath|re: '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
    condition: selection_eid and 1 of selection_share_*
falsepositives:
    - Unknown
level: high