Forest Blizzard APT - Custom Protocol Handler DLL Registry Set

 1title: Forest Blizzard APT - Custom Protocol Handler DLL Registry Set
 2id: d807056b-0e00-4cec-b7f8-b8b7518e382b
 3status: experimental
 4description: |
 5    Detects the setting of the DLL that handles the custom protocol handler.
 6    Seen being created by Forest Blizzard APT as reported by MSFT.    
 7references:
 8    - https://www.microsoft.com/en-us/security/blog/2024/04/22/analyzing-forest-blizzards-custom-post-compromise-tool-for-exploiting-cve-2022-38028-to-obtain-credentials/
 9author: Nasreddine Bencherchali (Nextron Systems)
10date: 2024/04/23
11tags:
12    - attack.persistence
13    - attack.t1547.001
14logsource:
15    category: registry_set
16    product: windows
17detection:
18    selection:
19        TargetObject|contains: '\CLSID\{026CC6D7-34B2-33D5-B551-CA31EB6CE345}\Server'
20        Details|endswith: '.dll'
21    condition: selection
22falsepositives:
23    - Unlikely
24level: high