Uncommon Outbound Kerberos Connection - Security

 1title: Uncommon Outbound Kerberos Connection - Security
 2id: eca91c7c-9214-47b9-b4c5-cb1d7e4f2350
 3related:
 4    - id: e54979bd-c5f9-4d6c-967b-a04b19ac4c74
 5      type: similar
 6status: test
 7description: |
 8        Detects uncommon outbound network activity via Kerberos default port indicating possible lateral movement or first stage PrivEsc via delegation.
 9references:
10    - https://github.com/GhostPack/Rubeus
11author: Ilyas Ochkov, oscd.community
12date: 2019/10/24
13modified: 2024/03/15
14tags:
15    - attack.lateral_movement
16    - attack.t1558.003
17logsource:
18    product: windows
19    service: security
20detection:
21    selection:
22        EventID: 5156
23        DestPort: 88
24    filter_main_lsass:
25        Application|startswith:
26            - '\device\harddiskvolume'
27            - 'C:'
28        Application|endswith: '\Windows\System32\lsass.exe'
29    filter_optional_chrome:
30        Application|startswith:
31            - '\device\harddiskvolume'
32            - 'C:'
33        Application|endswith:
34            - '\Program Files (x86)\Google\Chrome\Application\chrome.exe'
35            - '\Program Files\Google\Chrome\Application\chrome.exe'
36    filter_optional_firefox:
37        Application|startswith:
38            - '\device\harddiskvolume'
39            - 'C:'
40        Application|endswith:
41            - '\Program Files (x86)\Mozilla Firefox\firefox.exe'
42            - '\Program Files\Mozilla Firefox\firefox.exe'
43    filter_optional_tomcat:
44        Application|endswith: '\tomcat\bin\tomcat8.exe'
45    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
46falsepositives:
47    - Web Browsers and third party application might generate similar activity. An initial baseline is required.
48level: medium