""ET INFO Powershell Downloader with Start-Process Inbound M1""

SID: 2029339

Revision: 3

Class Type: bad-unknown

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_29, deployment Perimeter, signature_severity Informational, updated_at 2020_01_31

Reference:

  • md5

  • b510f48b9ac735a197093ad5fb99b0ee

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "200"

  • Value: "new-object System.Net.WebClient"

  • Value: ".DownloadFile("

  • Value: "Start-Process"

Within: 500

PCRE:

Special Options:

  • http_stat_code

  • file_data

  • nocase

  • fast_pattern

source