""ET TROJAN Win32/Final1stspy CnC Checkin (Reaper/APT37 Stage 1 Payload)""

SID: 2026431

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_01, deployment Perimeter, malware_family Final1stspy, performance_impact Low, signature_severity Major, tag APT37, tag ReaperGroup, updated_at 2018_10_01

Reference:

  • md5

  • a2fe5dcb08ae8b72e8bc98ddc0b918e7

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: ".php?MachineId="

  • Value: "&InfoSo="

  • Value: "&Index="

  • Value: "&Account="

  • Value: "&List="

  • Value: "User-Agent|3a 20|Host|20|Process|20|Update"

  • Value: !"Referer|3a|"

Within:

PCRE: "/List=(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})$/Ui"

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_header

  • http_header

source