Potential CVE-2023-36884 Exploitation Pattern

Detects a unique pattern seen being used by RomCom potentially exploiting CVE-2023-36884

Detection logic

selection

cs-method: GET
c-uri|contains: /MSHTML_C7/
c-uri|re: \?d=[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}

Condition

selection

Raw YAML

title: Potential CVE-2023-36884 Exploitation Pattern
id: 0066d244-c277-4c3e-88ec-9e7b777cc8bc
status: test
description: Detects a unique pattern seen being used by RomCom potentially exploiting CVE-2023-36884
references:
    - https://blogs.blackberry.com/en/2023/07/romcom-targets-ukraine-nato-membership-talks-at-nato-summit
author: X__Junior
date: 2023-07-12
tags:
    - attack.command-and-control
    - cve.2023-36884
    - detection.emerging-threats
logsource:
    category: proxy
detection:
    selection:
        cs-method: 'GET'
        c-uri|contains: '/MSHTML_C7/'
        c-uri|re: '\?d=[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
    condition: selection
falsepositives:
    - Unknown
level: critical

False positives

Unknown

References

https://blogs.blackberry.com/en/2023/07/romcom-targets-ukraine-nato-membership-talks-at-nato-summit

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