""ET TROJAN HTTP POST with Suspicious User-Agent Observed - Possible ZLoader Activity M1""

SID: 2050647

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, created_at 2024_01_31, deployment Perimeter, deployment SSLDecrypt, malware_family Zloader, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_01_31

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: "User-Agent|3a 20|Security Metrics"

Within:

PCRE:

Special Options:

  • http_method

  • http_header

source