""ET TROJAN Locky CnC Checkin""

SID: 2026517

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 2018_10_17, deployment Perimeter, signature_severity Major, tag Locky, updated_at 2018_10_17

Reference:

  • md5

  • 40ebefdec6870263827ce6425702e785

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "POST"

  • Value: "/imageload.cgi"

  • Value: "x-requested-with|3a 20|XMLHttpRequest|0d 0a|"

  • Value: "www-form-urlencoded|0d 0a|"

Within:

PCRE: "/^[A-Za-z]{1,10}=[^&]+(?:&[A-Za-z]{1,10}=[^&]+){10,}$/Ps"

Special Options:

  • http_method

  • fast_pattern

  • http_header

  • http_header

source