""ET TROJAN MacOS/Realst CnC Checkin""

SID: 2047005

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_07_31, deployment Perimeter, malware_family MacOS_Realst, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_07_31

Reference:

  • md5

  • b56f0f689caf2997a67383d25ef9f64a

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: "/opened"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name|3d 22|buildName|22 0d 0a 0d 0a|"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name|3d 22|buildVersion|22 0d 0a 0d 0a|"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name|3d 22|uid|22 0d 0a 0d 0a|"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/\x22uid\x22\x0d\x0a\x0d\x0a[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}/P"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_client_body

  • http_header

source