""ET TROJAN Atomic MacOS Stealer CnC Exfil (POST)""

SID: 2048103

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_09_18, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2023_09_18, reviewed_at 2023_09_18

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: "/sendlog"

  • Value: "|0d 0a|Content|2d|Type|3a 20|application|2f|x|2d|www|2d|form|2d|urlencoded|0d 0a|Content|2d|Length|3a 20|"

  • Value: !"Referer|3a 20|"

  • Value: !"Accept|3a 20|"

  • Value: !"Connection|3a 20|"

  • Value: !"User-Agent|3a 20|"

Within:

PCRE: "/^Host\x3a\x20(?:[0-9]{1,3}.){3}[0-9]{1,3}/H"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

source