""ET TROJAN [ESET] TA410 APT LookBack HTTP Server Response""

SID: 2036413

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_04_28, deployment Perimeter, malware_family TA410, signature_severity Major, updated_at 2022_04_28

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "200"

  • Value: "Content-Type|3a 20|image/gif|0d 0a|"

  • Value: "|c2 2e ab 48|" Depth: 4

Within:

PCRE:

Special Options:

  • http_stat_code

  • http_header

  • file_data

  • fast_pattern

source