SID: 2037275

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_09, deployment Perimeter, malware_family Lazarus, malware_family Stonefly, signature_severity Major, tag c2, updated_at 2022_07_06, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/1"

  • Value: ".php?ufw="

  • Value: "User-Agent|3a 20|Mozilla/5.0 (Windows|3b 20|U|3b 20|Windows NT 6.1|3b|"

Within:

PCRE: "/\/[a-z0-9]{16}.php\?ufw=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/U"

Special Options:

  • http_method

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

source