""ET TROJAN Arid Viper APT Related Activity (POST)""

SID: 2039171

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_10_12, deployment Perimeter, deployment SSLDecrypt, malware_family AridViper, malware_family TA401, signature_severity Major, updated_at 2022_10_12

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: !".htm"

  • Value: !".asp"

  • Value: "Content-Type|3a 20|multipart/form-data|3b 20|boundary="

  • Value: "|0d 0a|V2luZG93cy"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+\r\nAccept\x3a\x20[^\r\n]+\r\nContent-Length\x3a\x20[^\r\n]+\r\nContent-Type\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_header

  • fast_pattern

  • http_client_body

source