blue-team-tools/rules/windows/process_creation/proc_creation_win_finger_usage.yml

title: Finger.exe Suspicious Invocation
id: af491bca-e752-4b44-9c86-df5680533dbc
status: experimental
description: Detects suspicious aged finger.exe tool execution often used in malware attacks nowadays
references:
    - https://twitter.com/bigmacjpg/status/1349727699863011328?s=12
    - https://app.any.run/tasks/40115012-a919-4208-bfed-41e82cb3dadf/
    - http://hyp3rlinx.altervista.org/advisories/Windows_TCPIP_Finger_Command_C2_Channel_and_Bypassing_Security_Software.txt
author: Florian Roth (Nextron Systems), omkar72, oscd.community
date: 2021/02/24
modified: 2022/08/16
tags:
    - attack.command_and_control
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - OriginalFileName: 'finger.exe'
        - Image|endswith: '\finger.exe'
    condition: selection
falsepositives:
    - Admin activity (unclear what they do nowadays with finger.exe)
level: high