sublimemediumRule

Open redirect: next2.io

Message contains use of a next.io redirect. This redirection has been abused by threat actors in the wild.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1036 T1027

defense-evasioninitial-access

Detection Query

type.inbound
and any(body.links,
        .href_url.domain.domain == "c.next2.io"
        and .href_url.path =~ "/api/ads"
        and strings.icontains(.href_url.query_params, 'fallback_url=')
)

// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Open redirect: next2.io"
description: "Message contains use of a next.io redirect. This redirection has been abused by threat actors in the wild."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(body.links,
          .href_url.domain.domain == "c.next2.io"
          and .href_url.path =~ "/api/ads"
          and strings.icontains(.href_url.query_params, 'fallback_url=')
  )
  
  // negate highly trusted sender domains unless they fail DMARC authentication
  and (
    (
      sender.email.domain.root_domain in $high_trust_sender_root_domains
      and not headers.auth_summary.dmarc.pass
    )
    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
  )

attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Evasion"
  - "Open redirect"
  - "Social engineering"
detection_methods:
  - "Content analysis"
  - "Header analysis"
  - "Sender analysis"
  - "URL analysis"
id: "5085c422-6fce-5ce9-836b-d4834117e810"