Detectionhightest

PSAsyncShell - Asynchronous TCP Reverse Shell

Detects the use of PSAsyncShell an Asynchronous TCP Reverse Shell written in powershell

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Nasreddine Bencherchali (Nextron Systems)Created Tue Oct 04afd3df04-948d-46f6-ae44-25966c44b97fwindows

Log Source

WindowsPowerShell Script

ProductWindows← raw: windows

CategoryPowerShell Script← raw: ps_script

Definition

Requirements: Script Block Logging must be enabled

Detection Logic

detection:
    selection:
        ScriptBlockText|contains: 'PSAsyncShell'
    condition: selection

False Positives

Unlikely

False positives are unlikely for most environments. High confidence detection.

References

MITRE ATT&CK

Tactics

Sub-techniques

Rule Metadata

Rule ID

afd3df04-948d-46f6-ae44-25966c44b97f

Status

test

Level

high

Type

Detection

Created

Tue Oct 04

Author

Path

rules/windows/powershell/powershell_script/posh_ps_psasyncshell.yml

Raw Tags

attack.executionattack.t1059.001