Potential Raspberry Robin Dot Ending File

 1title: Potential Raspberry Robin Dot Ending File
 2id: a35c97c8-d9c4-4c89-a3e7-533dc0bcb73a
 3status: test
 4description: Detects commandline containing reference to files ending with a "." This scheme has been seen used by raspberry-robin
 5author: Nasreddine Bencherchali (Nextron Systems)
 6references:
 7    - https://www.microsoft.com/en-us/security/blog/2022/10/27/raspberry-robin-worm-part-of-larger-ecosystem-facilitating-pre-ransomware-activity/
 8date: 2022-10-28
 9modified: 2023-02-05
10tags:
11    - attack.execution
12    - detection.emerging-threats
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection:
18        # Example 1: https://www.microsoft.com/en-us/security/blog/wp-content/uploads/2022/10/fig-3f-raspberryrobin-runonce.png
19        # Example 2: https://www.microsoft.com/en-us/security/blog/wp-content/uploads/2022/10/fig-5f-odbcconf.png
20        # Example 3: https://www.microsoft.com/en-us/security/blog/wp-content/uploads/2022/10/fig-6f-fauppod-command-line.png
21        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
22    condition: selection
23falsepositives:
24    - Unknown
25level: high