Detection rules › Sublime MQL
Open redirect: bestdeals.today
Message contains use of the bestdeals.today open redirect. This has been exploited in the wild.
Threat classification
Sublime's own taxonomy (not MITRE ATT&CK).
| Category | Values |
|---|---|
| Attack types | Credential Phishing, Malware/Ransomware |
| Tactics and techniques | Open redirect |
Event coverage
Rule body MQL
type.inbound
and any(body.links,
.href_url.domain.root_domain == "bestdeals.today"
and strings.icontains(.href_url.path, '/redirect')
and regex.icontains(.href_url.query_params, '(?:^|&)url=')
)
and sender.email.domain.root_domain != 'bestdeals.today'
and headers.return_path.domain.root_domain != "bestdeals.today"
// 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 bestdeals.today open redirect. This has been exploited in the wild.
- inbound message
any of
body.linkswhere all hold:- .href_url.domain.root_domain is 'bestdeals.today'
- .href_url.path contains '/redirect'
- .href_url.query_params matches '(?:^|&)url='
- sender.email.domain.root_domain is not 'bestdeals.today'
- headers.return_path.domain.root_domain is not 'bestdeals.today'
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, headers.return_path.domain.root_domain, sender.email.domain.root_domain, type.inbound. Sensors: regex.icontains, strings.icontains. Reference lists: $high_trust_sender_root_domains.
Indicators matched (3)
| Field | Match | Value |
|---|---|---|
body.links[].href_url.domain.root_domain | equals | bestdeals.today |
strings.icontains | substring | /redirect |
regex.icontains | regex | (?:^|&)url= |