""ET TROJAN 000Stealer CnC Checkin""

SID: 2036306

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 2022_04_22, deployment Perimeter, malware_family 000Stealer, performance_impact Low, signature_severity Major, updated_at 2022_04_22, 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: established,to_server

Contents:

  • Value: "POST|20|/ping|20|" Depth: 11

  • Value: "key=" Depth: 4

  • Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

  • Value: "Content-Length|3a 20|36|0d 0a|"

  • Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

Within:

PCRE: "/^key=[A-F0-9]{32}$/P"

Special Options:

  • fast_pattern

  • http_client_body

  • http_header

  • http_header

  • http_header

source