Suspicious Unsigned Thor Scanner Execution

 1title: Suspicious Unsigned Thor Scanner Execution
 2id: ea5c131b-380d-49f9-aeb3-920694da4d4b
 3status: stable
 4description: Detects loading and execution of an unsigned thor scanner binary.
 5references:
 6    - Internal Research
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2023-10-29
 9tags:
10    - attack.privilege-escalation
11    - attack.persistence
12    - attack.execution
13    - attack.stealth
14    - attack.t1574.001
15logsource:
16    category: image_load
17    product: windows
18detection:
19    selection:
20        Image|endswith:
21            - '\thor.exe'
22            - '\thor64.exe'
23        ImageLoaded|endswith:
24            - '\thor.exe'
25            - '\thor64.exe'
26    filter_main:
27        Signed: 'true'
28        SignatureStatus: 'valid'
29        Signature: 'Nextron Systems GmbH'
30    condition: selection and not filter_main
31falsepositives:
32    - Other legitimate binaries named "thor.exe" that aren't published by Nextron Systems
33level: high