""ET TROJAN AutoIt3 Script Downloaded via Powershell Shortly After AutoIt3.exe Download""

SID: 2052524

Revision: 1

Class Type: misc-activity

Metadata: attack_target Client_Endpoint, created_at 2024_05_09, deployment Perimeter, signature_severity Major, tag c2, updated_at 2024_05_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

Reference:

• md5

• 0286120018b92f5827ff9ad84696e7b3

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

• Value: "GET"

• Value: ".au3"

• Value: "WindowsPowerShell/"

• Value: !"Referer|3a 20|"

Within:

PCRE: "/User-Agent\x3a\x20[^\r\n]+WindowsPowerShell\//H"

Special Options:

• http_method

• http_uri

• http_header

• fast_pattern

• http_header

source