""ET TROJAN Possible Sharik/Smoke Loader Microsoft Connectivity check""

SID: 2025120

Revision: 4

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_12_05, deployment Perimeter, signature_severity Major, tag Smoke_Loader, updated_at 2018_01_31

Reference:

  • md5

  • 7e604b9e059d054d58c91330d4d88c62

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: "/kb/" Depth: 4

  • Value: "User-Agent|3a|"

  • Value: !"Microsoft Outlook"

  • Value: "|0d 0a|"

  • Value: !"Referer|3a|"

  • Value: !"Accept"

Within:

PCRE: "/^\/kb\/\d{4,8}$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

  • http_header

source