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.defense_evasion
11    - attack.t1574.002
12logsource:
13    category: image_load
14    product: windows
15detection:
16    selection:
17        Image|endswith:
18            - '\thor.exe'
19            - '\thor64.exe'
20        ImageLoaded|endswith:
21            - '\thor.exe'
22            - '\thor64.exe'
23    filter_main:
24        Signed: 'true'
25        SignatureStatus: 'valid'
26        Signature: 'Nextron Systems GmbH'
27    condition: selection and not filter_main
28falsepositives:
29    - Other legitimate binaries named "thor.exe" that aren't published by Nextron Systems
30level: high