""ET TROJAN NightfallGT Mercurial Grabber""

SID: 2033197

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_28, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, signature_severity Major, updated_at 2021_06_30

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: "|2c 22|username|22 3a 20 22|Mercurial|20|Grabber|22 2c 20 22|"

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

Within:

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

Special Options:

  • http_header

  • http_client_body

  • fast_pattern

source