""ET TROJAN Spark RAT CnC Checkin (POST)""

SID: 2047681

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Client_Endpoint, created_at 2023_08_21, deployment Perimeter, malware_family SparkRAT, confidence High, signature_severity Critical, updated_at 2023_08_21, reviewed_at 2023_08_21

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: "|2f|api|2f|client|2f|update|3f|arch|3d|" Depth: 24

  • Value: "Content|2d|Length|3a 20|384|0d 0a|Content|2d|Type|3a 20|application|2f|octet|2d|stream|0d 0a|Secret|3a 20|"

  • Value: "|0d 0a|Accept|2d|Encoding|3a 20|gzip|0d 0a 0d 0a|"

Within:

PCRE: "/^(?:[a-z0-9]{40})/R"

Special Options:

  • http_method

  • http_uri

  • http_header

source