""ET TROJAN Suspected Lazarus APT Validator Related Activity (POST)""

SID: 2049690

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_12_14, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, updated_at 2023_12_14

Reference:

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-Length|3a 20|33|0d 0a|"

  • Value: "Content-Type|3a 20|application/octet-stream|0d 0a|"

Within:

PCRE: "/^Host[^\r\n]+\r\nAccept[^\r\n]+\r\nContent-Type[^\r\n]+\r\nContent-Length[^\r\n]+\r\n\r\n$/Hm"

Special Options:

  • http_method

  • fast_pattern

  • http_header

  • http_header

source