""ET TROJAN W32/Kbot.Backdoor Variant CnC Beacon""

SID: 2018078

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2014_02_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2014_07_25, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 1df0ceab582ae94c83d7d2c79389e178

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/stat.php"

  • Value: "id=" Depth: 3

  • Value: "&build_id="

Within:

PCRE: "/&build_id=[A-F0-9]+$/Pi"

Special Options:

  • nocase

  • http_method

  • nocase

  • http_uri

  • http_client_body

  • http_client_body

source