AppInit DLL Installation

calendar Mar 26, 2024 · attack.privilege_escalation attack.persistence attack.t1546 attack.t1546.010  ·
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One persistence mechanism used by some variations of SmashJacker was an AppInit DLL. It would use a reg.exe command to create appropriate Windows Registry keys for persistence. Part of the RedCanary 2024 Threat Detection Report.

Sigma rule (View on GitHub)

 1title: AppInit DLL Installation
 2id: 65e7b868-ebe9-4e8a-b828-3bd2181bc407
 3status: experimental
 4description: |
 5    One persistence mechanism used by some variations of SmashJacker was an AppInit DLL. 
 6    It would use a reg.exe command to create appropriate Windows Registry keys for 
 7    persistence. Part of the RedCanary 2024 Threat Detection Report.    
 8references:
 9    - https://redcanary.com/threat-detection-report/threats/smashjacker/
10author: RedCanary, Sigma formatting by Micah Babinski
11date: 2024/03/21
12tags:
13    - attack.privilege_escalation
14    - attack.persistence
15    - attack.t1546
16    - attack.t1546.010
17logsource:
18    category: process_creation
19    product: windows
20detection:
21    selection:
22        Image|endswith: '\reg.exe'
23        CommandLine|contains|all:
24            - 'add'
25            - 'AppInit_DLLs'
26    condition: selection
27falsepositives:
28    - Unknown
29level: low```

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