Finger.exe Suspicious Invocation

Detects suspicious aged finger.exe tool execution often used in malware attacks nowadays

Sigma rule (View on GitHub)

 1title: Finger.exe Suspicious Invocation
 2id: af491bca-e752-4b44-9c86-df5680533dbc
 3status: test
 4description: Detects suspicious aged finger.exe tool execution often used in malware attacks nowadays
 5references:
 6    - https://twitter.com/bigmacjpg/status/1349727699863011328?s=12
 7    - https://app.any.run/tasks/40115012-a919-4208-bfed-41e82cb3dadf/
 8    - http://hyp3rlinx.altervista.org/advisories/Windows_TCPIP_Finger_Command_C2_Channel_and_Bypassing_Security_Software.txt
 9author: Florian Roth (Nextron Systems), omkar72, oscd.community
10date: 2021/02/24
11modified: 2022/08/16
12tags:
13    - attack.command_and_control
14    - attack.t1105
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection:
20        - OriginalFileName: 'finger.exe'
21        - Image|endswith: '\finger.exe'
22    condition: selection
23falsepositives:
24    - Admin activity (unclear what they do nowadays with finger.exe)
25level: high

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