""ET CURRENT_EVENTS Powershell Download Command Observed within Flash File - Probable EK Activity""

SID: 2028941

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_05, deployment Perimeter, signature_severity Major, updated_at 2019_11_05

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "200"

  • Value: "Content-Type|3a 20|application/x-shockwave-flash"

  • Value: "cmd.exe /c powershell"

  • Value: "DownloadFile("

Within: 100

PCRE:

Special Options:

  • http_stat_code

  • file_data

  • fast_pattern

  • nocase

source