Add Debugger Entry To AeDebug For Persistence

Detects when an attacker adds a new "Debugger" value to the "AeDebug" key in order to achieve persistence which will get invoked when an application crashes

Sigma rule (View on GitHub)

 1title: Add Debugger Entry To AeDebug For Persistence
 2id: 092af964-4233-4373-b4ba-d86ea2890288
 3status: test
 4description: Detects when an attacker adds a new "Debugger" value to the "AeDebug" key in order to achieve persistence which will get invoked when an application crashes
 5references:
 6    - https://persistence-info.github.io/Data/aedebug.html
 7    - https://learn.microsoft.com/en-us/windows/win32/debug/configuring-automatic-debugging
 8author: Nasreddine Bencherchali (Nextron Systems)
 9date: 2022/07/21
10modified: 2023/08/17
11tags:
12    - attack.persistence
13logsource:
14    category: registry_set
15    product: windows
16detection:
17    selection:
18        TargetObject|contains: '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug\Debugger'
19        Details|endswith: '.dll'
20    filter:
21        Details: '"C:\WINDOWS\system32\vsjitdebugger.exe" -p %ld -e %ld -j 0x%p'
22    condition: selection and not filter
23falsepositives:
24    - Legitimate use of the key to setup a debugger. Which is often the case on developers machines
25level: medium

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