Detectionmediumtest

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.

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Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Nasreddine Bencherchali (Nextron Systems)Created Tue Mar 1453d8d3e1-ca33-4012-adf3-e05a4d652e34windows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

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

False Positives

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

References

MITRE ATT&CK

Tactics

TA0005 · Defense Evasion

Techniques

T1218 · System Binary Proxy Execution

Rule Metadata

Rule ID