Detection rules › Sublime MQL

Open redirect: MSN

Severity
medium
Type
rule
Source
github.com/sublime-security/sublime-rules

Message uses an MSN open redirect. Sample (benign) redirect to sublimesecurity[.]com: https[:]//www[.]msn[.]com/en-gb/lifestyle/rf-best-products-uk/redirect?url=aHR0cHM6Ly93d3cuc3VibGltZXNlY3VyaXR5LmNvbQ==

Threat classification

Sublime's own taxonomy (not MITRE ATT&CK).

CategoryValues
Attack typesCredential Phishing, Malware/Ransomware
Tactics and techniquesOpen redirect

Event coverage

Rule body MQL

type.inbound
and any(body.links,
        .href_url.domain.root_domain == "msn.com"
        and .href_url.path =~ "/en-gb/lifestyle/rf-best-products-uk/redirect"
        and strings.icontains(.href_url.query_params, "url")
)

Detection logic

Scope: inbound message.

Message uses an MSN open redirect. Sample (benign) redirect to sublimesecurity[.]com: https[:]//www[.]msn[.]com/en-gb/lifestyle/rf-best-products-uk/redirect?url=aHR0cHM6Ly93d3cuc3VibGltZXNlY3VyaXR5LmNvbQ==

  1. inbound message
  2. any of body.links where all hold:
    • .href_url.domain.root_domain is 'msn.com'
    • .href_url.path is '/en-gb/lifestyle/rf-best-products-uk/redirect'
    • .href_url.query_params contains 'url'

Inspects: body.links, body.links[].href_url.domain.root_domain, body.links[].href_url.path, body.links[].href_url.query_params, type.inbound. Sensors: strings.icontains.

Indicators matched (3)

FieldMatchValue
body.links[].href_url.domain.root_domainequalsmsn.com
body.links[].href_url.pathequals/en-gb/lifestyle/rf-best-products-uk/redirect
strings.icontainssubstringurl