sublimemediumRule

Open Redirect: asemailmgmteu.com

Message contains use of the asemailmgmteu.com open redirect. This has been exploited in the wild.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1204.002 T1486

Detection Query

type.inbound
and 0 < length(body.links) < 10
and any(body.links,
        .href_url.domain.root_domain == "asemailmgmteu.com"
        and strings.icontains(.href_url.query_params, 'redirect=')
        and .display_text != "unsubscribe"
        // negate use of the redirect by asemailmgmteu.com
        and not any(.href_url.query_params_decoded["redirect"],
                    strings.parse_url(.).domain.root_domain == sender.email.domain.root_domain
                    or strings.parse_url(.).domain.root_domain == "asemailmgmteu.com"
        )
)
// 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: asemailmgmteu.com"
description: "Message contains use of the asemailmgmteu.com open redirect. This has been exploited in the wild."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and 0 < length(body.links) < 10
  and any(body.links,
          .href_url.domain.root_domain == "asemailmgmteu.com"
          and strings.icontains(.href_url.query_params, 'redirect=')
          and .display_text != "unsubscribe"
          // negate use of the redirect by asemailmgmteu.com
          and not any(.href_url.query_params_decoded["redirect"],
                      strings.parse_url(.).domain.root_domain == sender.email.domain.root_domain
                      or strings.parse_url(.).domain.root_domain == "asemailmgmteu.com"
          )
  )
  // 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"
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Open redirect"
detection_methods:
  - "Sender analysis"
  - "URL analysis"
id: "368871ea-5b78-5507-a873-8a66aa346cce"