AMSI Bypass Pattern Assembly GetType
Detects code fragments found in small and obfuscated AMSI bypass PowerShell scripts
Detection logic
Detection requirements
- Platform
- ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source product
- windows
- Log source category
- ps_script
Known benign triggers
- Unknown
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
References
| Reference | Cited by |
|---|---|
| twitter.com/cyb3rops/status/1588574518057979905?s=20&t=A7hh93ONM7ni1Rj1jO5OaA | Only this detection cites it |
| www.mdsec.co.uk/2018/06/exploring-powershell-amsi-and-logging-evasion/ | 2 |
From the source
- At source
- Open at source
- Upstream identifier
- e0d6c087-2d1c-47fd-8799-3904103c5a98
- Tagged by the source as
- attack.defense-impairmentattack.execution
Licence
- Published under
- Detection Rule License 1.1Read the licence
- Attribution
- Required
Authorship
- Written by
- Published
- Aug 26, 2026
- Version
- 1