""ET TROJAN Antinum WebSockets Start""

SID: 2043012

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_12_27, deployment Perimeter, deployment SSLDecrypt, malware_family Antinum, confidence Low, signature_severity Major, updated_at 2022_12_27

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/ws"

  • Value: "Host|3a 20|" Depth: 6

  • Value: "User-Agent|3a 20|Go-http-client/1.1|0d 0a|Connection|3a 20|Upgrade|0d 0a|Sec-WebSocket-Key|3a 20|"

  • Value: "Upgrade|3a 20|websocket|0d 0a|"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20Go-http-client\/1.1\r\nConnection\x3a\x20[^\r\n]+\r\nSec-WebSocket-Key\x3a\x20[^\r\n]+\r\nSec-WebSocket-Version\x3a\x20[^\r\n]+\r\nUpgrade\x3a\x20websocket[\r\n]+$/H"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_header

source