""ET INFO Observed File Transfer Service SSL/TLS Certificate (transfer .sh)""

SID: 2033076

Revision: 7

Class Type: misc-activity

Metadata: attack_target Client_and_Server, created_at 2021_06_03, deployment Perimeter, former_category TROJAN, performance_impact Low, signature_severity Informational, tag SSL_Malicious_Cert, updated_at 2024_07_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: 443

Destination Network: $HOME_NET

Destination Port: any

Flow: from_server,established

Contents:

  • Value: "|16|"

  • Value: "|0b|"

  • Value: "|06 03 55 04 03|"

  • Value: "|0b|transfer.sh"

Within: 12

PCRE:

Special Options:

  • fast_pattern

source