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CriticalSigmaHQok @securonix invrep_de +1

Bad Opsec Powershell Code Artifacts

focuses on trivial artifacts observed in variants of prevalent offensive ps1 payloads, including Cobalt Strike Beacon, PoshC2, Powerview, Letmein, Empire, Powersploit, and other attack payloads that often undergo…

Description

focuses on trivial artifacts observed in variants of prevalent offensive ps1 payloads, including Cobalt Strike Beacon, PoshC2, Powerview, Letmein, Empire, Powersploit, and other attack payloads that often undergo minimal changes by attackers due to bad opsec.

Detection logic

Detection requirements

Platform
Windows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
windows
Log source category
ps_module

Known benign triggers

  • Moderate-to-low; Despite the shorter length/lower entropy for some of these, because of high specificity, fp appears to be fairly limited in many environments.

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