sublimemediumRule

Open redirect: Klaviyo

Message contains use of the Klaviyo (kmail-lists.com) open redirect, but the link display text does not match known permutations. This has been exploited in the wild.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1036 T1027 T1598.003

defense-evasioninitial-access

Detection Query

type.inbound
and any(body.links,
        .href_url.domain.domain == 'manage.kmail-lists.com'
        and .href_url.path =~ '/subscriptions/subscribe/update'
        and strings.icontains(.href_url.query_params, 'r=')
        and not strings.ilike(.display_text, "*subscribe*", "*manage*")
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Open redirect: Klaviyo"
description: "Message contains use of the Klaviyo (kmail-lists.com) open redirect, but the link display text does not match known permutations. This has been exploited in the wild."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(body.links,
          .href_url.domain.domain == 'manage.kmail-lists.com'
          and .href_url.path =~ '/subscriptions/subscribe/update'
          and strings.icontains(.href_url.query_params, 'r=')
          and not strings.ilike(.display_text, "*subscribe*", "*manage*")
  )

attack_types:
  - "Credential Phishing"
  - "Spam"
tactics_and_techniques:
  - "Evasion"
  - "Impersonation: Brand"
  - "Open redirect"
  - "Social engineering"
detection_methods:
  - "Content analysis"
  - "URL analysis"
id: "ce5a370a-3b3b-55cb-a4c3-c05cb795b611"