Detection rules › Sublime MQL

Open redirect: IndiaTimes

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

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

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 == "indiatimes.com"
        and strings.icontains(.href_url.path, '/etl.php')
        and strings.icontains(.href_url.query_params, 'url=')
        // don't match on redirects to indiatimes.com
        and not regex.icontains(.href_url.query_params,
                                'url=[^\&]+\.indiatimes\.com\b'
        )
)
and (
  not profile.by_sender().solicited
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_messages_benign
  )
)

// 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
)

Detection logic

Scope: inbound message.

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

  1. inbound message
  2. any of body.links where all hold:
    • .href_url.domain.root_domain is 'indiatimes.com'
    • .href_url.path contains '/etl.php'
    • .href_url.query_params contains 'url='
    • not:
      • .href_url.query_params matches 'url=[^\\&]+\\.indiatimes\\.com\\b'
  3. any of:
    • not:
      • profile.by_sender().solicited
    • all of:
      • profile.by_sender().any_messages_malicious_or_spam
      • not:
        • profile.by_sender().any_messages_benign
  4. any of:
    • all of:
      • sender.email.domain.root_domain in $high_trust_sender_root_domains
      • not:
        • headers.auth_summary.dmarc.pass
    • sender.email.domain.root_domain not in $high_trust_sender_root_domains

Inspects: body.links, body.links[].href_url.domain.root_domain, body.links[].href_url.path, body.links[].href_url.query_params, headers.auth_summary.dmarc.pass, sender.email.domain.root_domain, type.inbound. Sensors: profile.by_sender, regex.icontains, strings.icontains. Reference lists: $high_trust_sender_root_domains.

Indicators matched (4)

FieldMatchValue
body.links[].href_url.domain.root_domainequalsindiatimes.com
strings.icontainssubstring/etl.php
strings.icontainssubstringurl=
regex.icontainsregexurl=[^\&]+\.indiatimes\.com\b