""ET TROJAN UAC-0114/Winter Vivern Screenshot Upload M2""

SID: 2044062

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_02_02, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_02_02

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: ".php"

  • Value: "cUsers/"

  • Value: "Microsoft_update_tool_"

  • Value: ".dat|0d 0a|"

  • Value: "|89 50 4e 47 0d 0a 1a 0a|" Depth: 8

Within: 7

PCRE: "/.php$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • fast_pattern

  • http_header

  • http_client_body

source