""ET EXPLOIT Possible Microsoft Exchange Server OWA GetWacUrl Information Disclosure Attempt (CVE-2020-17143)""

SID: 2035138

Revision: 1

Class Type: web-application-attack

Metadata: attack_target Server, created_at 2022_02_08, cve CVE_2020_17143, deployment Perimeter, deployment Internal, signature_severity Major, tag Exploit, updated_at 2022_02_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

  • cve

  • 2020-17143

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/owa/service.svc"

  • Value: "Action|3a 20|GetWacIframeUrlForOneDrive"

  • Value: "|22|EndPointUrl|22 3a 22|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • nocase

  • http_header

  • nocase

source