""ET TROJAN NightfallGT Discord Nitro Ransomware""

SID: 2033000

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_05_19, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, tag Ransomware, updated_at 2021_05_19, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

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: "Program executed"

  • Value: "Status|3a 20|Active|20|"

  • Value: "PC|20|Name|3a 20|"

  • Value: "IP|20|Address|3a 20|"

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

Within:

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

Special Options:

  • http_header

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

source