""ET TROJAN Possible Kaseya VSA Exploit URI Structure Inbound""

SID: 2033252

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Kaseya_VSA, attack_target Web_Server, created_at 2021_07_06, deployment Perimeter, signature_severity Major, updated_at 2021_07_06, reviewed_at 2024_05_06

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/userFilterTableRpt.asp"

  • Value: "User-Agent|3a 20|curl/"

Within:

PCRE: "/\/userFilterTableRpt.asp$/U"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_header

source