Netskope Threat Labs

AmsiBypass

ATP Sandbox Adv. HeuristicsAV

AmsiBypass is a detection for malicious PowerShell scripts that attempt to bypass the Windows Antimalware Scan Interface, the mechanism that lets security products inspect script content before execution. Cyberattackers disable or patch AMSI so that later stages of an attack can run obfuscated payloads without raising alerts. A detection of this family usually signals that cyberattackers have active code execution on the system and are preparing to deploy additional tooling.

First seen
October 2022
Last seen
October 2026
AMSIByPassAMSIBypass
Alert Name
DeepScan:Generic.AMSIByPass.Z.FFFFFFFE
Dump:Generic.AMSIByPass.Z.FFFFFFFE
Generic.AMSIByPass.Z.01E99AD8
Generic.AMSIByPass.Z.052D9F50
Generic.AMSIByPass.Z.05B080DE
Generic.AMSIByPass.Z.09D14A47
Generic.AMSIByPass.Z.0E8F65FC
Generic.AMSIByPass.Z.0EA30A2C
Generic.AMSIByPass.Z.0F1F1E07
Generic.AMSIByPass.Z.16C29415