""ET TROJAN MSIL/SkidRat CnC Checkin M1""

SID: 2027057

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 2019_03_06, deployment Perimeter, malware_family SkidRat, performance_impact Low, signature_severity Major, tag RAT, 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: "POST"

  • Value: "Windows|20|NT|20|6,2"

  • Value: "Gecko|2f|201001o1|20|Firef0x|2f|19,0"

  • Value: "9" Depth: 1

  • Value: !"Referer|3a|"

Within:

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

Special Options:

  • http_method

  • http_header

  • http_header

  • http_client_body

  • http_header

source