""ET TROJAN MSIL/Bobik CnC Traffic""

SID: 2034547

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 2021_11_29, deployment Perimeter, signature_severity Major, updated_at 2021_11_29

Reference:

  • md5

  • c110a5814451bbfba9eb41a2b2328213

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: ".php?key="

  • Value: "User-Agent|3a 20|test-upload|0d 0a|"

  • Value: "lang=" Depth: 5

  • Value: "&image=iVBORw"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

  • http_client_body

source