""ET TROJAN Observed Malicious SSL Cert (ServHelper CnC)""

SID: 2026616

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2018_11_16, deployment Perimeter, malware_family ServHelper, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2019_01_14, 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: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: from_server,established

Contents:

  • Value: "|16|"

  • Value: "|0b|"

  • Value: "|0E 06 ED F2 C3 91|"

  • Value: "|55 04 06|"

  • Value: "|02|AU"

  • Value: "|55 04 08|"

  • Value: "|0a|Some-State"

  • Value: "|55 04 07|"

  • Value: "|04|City"

  • Value: "|55 04 0a|"

  • Value: "|0c|Some Company"

Within: 14

PCRE:

Special Options:

  • fast_pattern

source