""ET TROJAN Py/MechaFlounder CnC Checkin""

SID: 2027047

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Python, attack_target Client_and_Server, created_at 2019_03_06, deployment Perimeter, malware_family MechaFlounder, performance_impact Low, signature_severity Major, tag APT, tag Chafer, tag Python, updated_at 2019_03_06

Reference:

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: !"|2f|" Depth: 1

  • Value: "--"

  • Value: "|5c|"

  • Value: "-service.html"

  • Value: !"Referer|3a|"

  • Value: !"User-Agent|3a|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

  • http_header

source