sigmamediumHunting

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.

MITRE ATT&CK

T1218

defense-evasion

Detection Query

selection_img:
  - Image|endswith: \dotnet-dump.exe
  - OriginalFileName: dotnet-dump.dll
selection_cli:
  CommandLine|contains: collect
condition: all of selection_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-03-14

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1218

Raw Content

title: Process Memory Dump Via Dotnet-Dump
id: 53d8d3e1-ca33-4012-adf3-e05a4d652e34
status: test
description: |
    Detects the execution of "dotnet-dump" with the "collect" flag. The execution could indicate potential process dumping of critical processes such as LSASS.
references:
    - https://learn.microsoft.com/en-us/dotnet/core/diagnostics/dotnet-dump#dotnet-dump-collect
    - https://twitter.com/bohops/status/1635288066909966338
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-14
tags:
    - attack.defense-evasion
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\dotnet-dump.exe'
        - OriginalFileName: 'dotnet-dump.dll'
    selection_cli:
        CommandLine|contains: 'collect'
    condition: all of selection_*
falsepositives:
    - 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
level: medium