SigmaHQ/rules/windows/process_creation/win_apt_bluemashroom.yml

title: BlueMashroom DLL Load
id: bd70d3f8-e60e-4d25-89f0-0b5a9cff20e0
status: experimental
description: Detects a suspicious DLL loading from AppData Local path as described in BlueMashroom report
references:
    - https://www.virusbulletin.com/conference/vb2019/abstracts/apt-cases-exploiting-vulnerabilities-region-specific-software
tags:
    - attack.defense_evasion
    - attack.t1117 # an old one
    - attack.t1218.010
author: Florian Roth
date: 2019/10/02
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - CommandLine|contains|all:
            - '\regsvr32'
            - '\AppData\Local\'
        - CommandLine|contains|all:
            - '\AppData\Local\'
            - ',DllEntry'
    condition: selection
falsepositives:
    - Unlikely
level: critical