""ET CURRENT_EVENTS [Fireeye] Backdoor.HTTP.BEACON.[CSBundle NYTIMES GET]""

SID: 2031276

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_12_08, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_12_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

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: "Accept|3a 20|/"

  • Value: "Accept-Encoding|3a 20|gzip, deflate, br"

  • Value: "Accept-Language|3a 20|en-US,en|3b|q=0.5"

  • Value: "nyt-a="

  • Value: "nyt-gdpr=0|3b|nyt-purr=cfh|3b|nyt-geo=US}"

Within:

PCRE: "/^(?:\/(?:(?:v(?:i-assets\/static-asset|[12]\/preference)|idcta\/translation)s|ads\/google))/U"

Special Options:

  • http_method

  • http_header

  • http_header

  • http_header

  • fast_pattern

source