""ET TROJAN JasperLoader CnC Checkin""

SID: 2027100

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2019_03_19, deployment Perimeter, malware_family JasperLoader, performance_impact Low, signature_severity Major, tag Downloader, tag JavaScript, updated_at 2019_03_27

Reference:

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: "?b="

  • Value: "&v="

  • Value: "&psver="

  • Value: "Connection|3a 20|Keep-Alive|0d|"

  • Value: !"Referer|3a|"

  • Value: !"User-Agent|3a|"

  • Value: !"Cache"

  • Value: !"Accept"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

  • http_header

source