""ET TROJAN PowerShell Script Downloading Emotet DLL""

SID: 2035000

Revision: 4

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_10, deployment Perimeter, signature_severity Major, updated_at 2023_04_04

Reference:

• md5

• c3cb504f97c7c7df9c25b0957dd60d9f

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: from_server,established

Contents:

• Value: "200"

• Value: "Content-Type|3a 20|image/png|0d 0a|"

• Value: "|24|path" Depth: 5

• Value: ".dll"

• Value: "((Get-Item |24|path).Length -ge 30000)"

Within: 200

PCRE: "/\x24url[0-9]{1}\s=\s'(http|https):\/\/[^']*\x27\x3b/i"

Special Options:

• http_stat_code

• http_header

• file_data

• fast_pattern

• nocase

source