SigmaHQ/rules/windows/process_creation/win_exploit_cve_2017_8759.yml

title: Exploit for CVE-2017-8759
id: fdd84c68-a1f6-47c9-9477-920584f94905
description: Detects Winword starting uncommon sub process csc.exe as used in exploits for CVE-2017-8759
references:
    - https://www.hybrid-analysis.com/sample/0b4ef455e385b750d9f90749f1467eaf00e46e8d6c2885c260e1b78211a51684?environmentId=100
    - https://www.reverse.it/sample/0b4ef455e385b750d9f90749f1467eaf00e46e8d6c2885c260e1b78211a51684?environmentId=100
tags:
    - attack.execution
    - attack.t1203
    - attack.t1204.002
    - attack.t1204  # an old one
    - attack.initial_access
    - attack.t1566.001
    - attack.t1193  # an old one
author: Florian Roth
date: 2017/09/15
modified: 2020/08/29
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\WINWORD.EXE'
        Image|endswith: '\csc.exe'
    condition: selection
falsepositives:
    - Unknown
level: critical