""ET TROJAN Red Wolf/RedCurl Domain (msftcloud .click) in TLS SNI""

SID: 2047967

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2023_09_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Red_Wolf, tag RedCurl, updated_at 2023_09_08, reviewed_at 2023_09_07

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 443

Flow: established,to_server

Contents:

  • Value: "|16|"

  • Value: "|01|"

  • Value: "|00 00|"

  • Value: "|00|"

  • Value: "msftcloud.click"

Within: 1

PCRE: "/^(?:\x00\x0f|.\x2e)msftcloud.click/R"

Special Options:

source