Potential Raspberry Robin Dot Ending File

title: Potential Raspberry Robin Dot Ending File
id: a35c97c8-d9c4-4c89-a3e7-533dc0bcb73a
status: test
description: Detects commandline containing reference to files ending with a "." This scheme has been seen used by raspberry-robin
author: Nasreddine Bencherchali (Nextron Systems)
references:
    - https://www.microsoft.com/en-us/security/blog/2022/10/27/raspberry-robin-worm-part-of-larger-ecosystem-facilitating-pre-ransomware-activity/
date: 2022-10-28
modified: 2023-02-05
tags:
    - attack.execution
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        # Example 1: https://www.microsoft.com/en-us/security/blog/wp-content/uploads/2022/10/fig-3f-raspberryrobin-runonce.png
        # Example 2: https://www.microsoft.com/en-us/security/blog/wp-content/uploads/2022/10/fig-5f-odbcconf.png
        # Example 3: https://www.microsoft.com/en-us/security/blog/wp-content/uploads/2022/10/fig-6f-fauppod-command-line.png
        CommandLine|re: \\[a-zA-Z0-9]{1,32}\.[a-zA-Z0-9]{1,6}\.[ "']{1}  # cannot match on end-of-line because of FPs with bind DNS notation
    condition: selection
falsepositives:
    - Unknown
level: high