Potential 7za.DLL Sideloading

 1title: Potential 7za.DLL Sideloading
 2id: 4f6edb78-5c21-42ab-a558-fd2a6fc1fd57
 3status: test
 4description: Detects potential DLL sideloading of "7za.dll"
 5references:
 6    - https://www.gov.pl/attachment/ee91f24d-3e67-436d-aa50-7fa56acf789d
 7author: X__Junior
 8date: 2023-06-09
 9tags:
10    - attack.defense-evasion
11    - attack.persistence
12    - attack.privilege-escalation
13    - attack.t1574.001
14    - attack.t1574.002
15logsource:
16    category: image_load
17    product: windows
18detection:
19    selection:
20        ImageLoaded|endswith: '\7za.dll'
21    filter_main_legit_path:
22        Image|startswith:
23            - 'C:\Program Files (x86)\'
24            - 'C:\Program Files\'
25        ImageLoaded|startswith:
26            - 'C:\Program Files (x86)\'
27            - 'C:\Program Files\'
28    condition: selection and not 1 of filter_main_*
29falsepositives:
30    - Legitimate third party application located in "AppData" may leverage this DLL to offer 7z compression functionality and may generate false positives. Apply additional filters as needed.
31level: low