""ET TROJAN Possible LINE DANCER Backdoor Connection Attempt""

SID: 2052271

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Cisco_ASA, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2024_04_25, deployment Perimeter, deployment SSLDecrypt, malware_family LINE_DANCER, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_04_25

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HOME_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/CSCOSSLC/config-auth"

  • Value: "|3c|host-scan-reply|3e|"

  • Value: "|3c 2f|host-scan-reply|3e|"

Within:

PCRE: "/\x3chost-scan-reply\x3e[a-zA-Z0-9+/=]{10}/P"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

source