""ET TROJAN Possible PikaBot Java Loader CnC Checkin""

SID: 2050875

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, created_at 2024_02_14, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_02_14

Reference:

  • md5

  • b5daa41dcb91138f2066513aa12fb9f3

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "User-Agent|3a 20|Java/"

  • Value: "Accept|3a 20|text|2f|html|2c 20|image|2f|gif|2c 20|image|2f|jpeg|2c 20 2a 3b 20|q|3d 2e|2|2c 20 2a 2f 2a 3b 20|q|3d 2e|2"

  • Value: "Connection|3a 20|keep-alive"

Within:

PCRE: "/^\/[A-Za-z0-9]{4,6}\/\d{6}$/U"

Special Options:

  • http_method

  • fast_pattern

  • http_header

  • http_header

  • http_header

source