Add Debugger Entry To Hangs Key For Persistence

calendar Aug 17, 2023 · attack.persistence  ·
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Detects when an attacker adds a new "Debugger" value to the "Hangs" key in order to achieve persistence which will get invoked when an application crashes

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 1title: Add Debugger Entry To Hangs Key For Persistence
 2id: 833ef470-fa01-4631-a79b-6f291c9ac498
 3status: experimental
 4description: Detects when an attacker adds a new "Debugger" value to the "Hangs" key in order to achieve persistence which will get invoked when an application crashes
 5references:
 6    - https://persistence-info.github.io/Data/wer_debugger.html
 7    - https://www.hexacorn.com/blog/2019/09/20/beyond-good-ol-run-key-part-116/
 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\Windows Error Reporting\Hangs\Debugger'
19    condition: selection
20falsepositives:
21    - This value is not set by default but could be rarly used by administrators
22level: high

References

  • WER Debugger

    WER Debugger Location: HKLM\Software\Microsoft\Windows\Windows Error Reporting\Hangs Classification: Criteria Value Permissions Admin Security context User; System Persistence type Registry Code ty...


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  • Beyond good ol’ Run key, Part 116

    This is a bit of an exotic entry, but it belongs to a very little understood world of Windows Error Reporting. When applications hang, the Windows Error Reporting framework allows us to attach a de...


    Read More

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