PowerShell Loading DotNET into Memory via Reflection

The following analytic detects the use of PowerShell scripts to load .NET assemblies into memory via reflection, a technique often used in malicious activities such as those by Empire and Cobalt Strike. It leverages PowerShell Script Block Logging (EventCode=4104) to capture and analyze the full command executed. This behavior is significant as it can indicate advanced attack techniques aiming to execute code in memory, bypassing traditional defenses. If confirmed malicious, this activity could lead to unauthorized code execution, privilege escalation, and persistent access within the environment.

ATT&CK coverage

Execution

T1059Command and Scripting Interpreter
- T1059.001PowerShell 354 detections cover this technique

Detection requirements

Log source category: powershell_script_block_logging_4104

Detection logic

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Detection catalogue

ATT&CK coverage

Detection requirements

Detection logic