Modification of IE Registry Settings

 1title: Modification of IE Registry Settings
 2id: d88d0ab2-e696-4d40-a2ed-9790064e66b3
 3status: test
 4description: Detects modification of the registry settings used for Internet Explorer and other Windows components that use these settings. An attacker can abuse this registry key to add a domain to the trusted sites Zone or insert JavaScript for persistence
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1112/T1112.md#atomic-test-4---add-domain-to-trusted-sites-zone
 7    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1112/T1112.md#atomic-test-5---javascript-in-registry
 8author: frack113
 9date: 2022-01-22
10modified: 2025-07-04
11tags:
12    - attack.persistence
13    - attack.defense-evasion
14    - attack.t1112
15logsource:
16    category: registry_set
17    product: windows
18detection:
19    selection_domains:
20        TargetObject|contains: '\Software\Microsoft\Windows\CurrentVersion\Internet Settings'
21    filter_main_dword:
22        Details|startswith: 'DWORD'
23    filter_main_office:
24        Details:
25            - 'Cookie:'
26            - 'Visited:'
27            - '(Empty)'
28    filter_main_path:
29        TargetObject|contains:
30            - '\Cache'
31            - '\ZoneMap'
32            - '\WpadDecision'
33    filter_main_binary:
34        Details: 'Binary Data'
35    filter_main_accepted_documents:
36        # Spotted during Office installations
37        TargetObject|contains: '\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Accepted Documents'
38    filter_main_runtimebroker:
39        Image: 'C:\Windows\System32\RuntimeBroker.exe'
40    condition: selection_domains and not 1 of filter_*
41falsepositives:
42    - Unknown
43level: low