""ET TROJAN Suspected Powershell Empire Activity M2""

SID: 2053782

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_06_20, deployment Perimeter, deployment SSLDecrypt, malware_family Empire, confidence Medium, signature_severity Major, tag c2, updated_at 2024_06_20, 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: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "/news.php"

  • Value: !"|0d 0a|referer|3a 20|"

  • Value: !"|0d 0a|accept|3a 20|"

  • Value: "|0d 0a|hop-name|0d 0a|"

Within:

PCRE:

Special Options:

  • http_uri

  • http_header

  • nocase

  • http_header

  • nocase

  • http_header

  • nocase

  • fast_pattern

source