""ET TROJAN TA450 Nagual CnC Activity""

SID: 2034325

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 2021_11_02, deployment Perimeter, performance_impact Moderate, signature_severity Major, tag TA450, updated_at 2021_11_02

Reference:

  • md5

  • b0ab12a5a4c232c902cdeba421872c37

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

  • Value: "CharSet|3a 20|UTF-8|0d 0a|"

  • Value: "vl=" Depth: 3

Within:

PCRE: "/^vl=[0-9D]+$/P"

Special Options:

  • http_method

  • http_header

  • http_header

  • fast_pattern

  • http_client_body

source