""ET TROJAN Cobalt Strike Activity (GET)""

SID: 2043416

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_01_19, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, updated_at 2023_01_19

Reference:

  • md5

  • 2157d05171e0a32c30a8c8350d25335a

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/r-arrow" Depth: 8

  • Value: "User-Agent|3a 20|Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|0|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chrome|2f|42|2e|0|2e|2311|2e|135|20|Safari|2f|537|2e|36|20|Edge|2f|12|2e|246"

  • Value: !"Referer|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

source