""ET TROJAN Win32/Ymacco.AA1C Activity""

SID: 2031477

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_01_04, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2021_01_04

Reference:

  • md5

  • b100f0ab63a2b74a5d5ff54d533fc60f

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: ".php?REQ="

  • Value: "&ID="

  • Value: "|29 20|WindowsPowerShell/"

  • Value: !"Accept"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+\x29\x20WindowsPowerShell\//Hmi"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_uri

  • http_header

  • http_header

  • http_header

source