""ET TROJAN 44 Caliber Stealer Data Exfil via Discord""

SID: 2032803

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_04_21, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, signature_severity Major, updated_at 2021_04_21

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "discord.com"

  • Value: "form-data|3b 20|name=content|0d 0a 0d 0a 5c|n|20 3a|spy|3a 20|NEW LOG FROM -|20|"

  • Value: "|20 30|person_in_manual_wheelchair|3a 0d 0a 5c|n|20 3a|eye|3a 20|IP|3a 20|"

  • Value: "|5c|n|20 3a|desktop|3a 20|"

  • Value: "POST /api/webhooks/" Depth: 19

  • Value: "Content-Type|3a 20|multipart/form-data|3b 20|boundary=|22|"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+discord.com/Hmi"

Special Options:

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

  • http_header

source