Process Memory Dump Via Dotnet-Dump

Detects the execution of "dotnet-dump" with the "collect" flag. The execution could indicate potential process dumping of critical processes such as LSASS

Sigma rule (View on GitHub)

 1title: Process Memory Dump Via Dotnet-Dump
 2id: 53d8d3e1-ca33-4012-adf3-e05a4d652e34
 3status: test
 4description: Detects the execution of "dotnet-dump" with the "collect" flag. The execution could indicate potential process dumping of critical processes such as LSASS
 5references:
 6    - https://learn.microsoft.com/en-us/dotnet/core/diagnostics/dotnet-dump#dotnet-dump-collect
 7    - https://twitter.com/bohops/status/1635288066909966338
 8author: Nasreddine Bencherchali (Nextron Systems)
 9date: 2023/03/14
10tags:
11    - attack.defense_evasion
12    - attack.t1218
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith: '\dotnet-dump.exe'
19        - OriginalFileName: 'dotnet-dump.dll'
20    selection_cli:
21        CommandLine|contains: 'collect'
22    condition: all of selection_*
23falsepositives:
24    - Process dumping is the expected behavior of the tool. So false positives are expected in legitimate usage. The PID/Process Name of the process being dumped needs to be investigated
25level: medium

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