Detection rules › Sublime MQL
Open redirect: weblinkconnect.com
Message contains use of the weblinkconnect.com open redirect, but the sender is not weblinkconnect.com. This has been exploited in the wild.
Threat classification
Sublime's own taxonomy (not MITRE ATT&CK).
| Category | Values |
|---|---|
| Attack types | Credential Phishing |
| Tactics and techniques | Evasion, Open redirect |
Event coverage
Rule body MQL
type.inbound
and length(filter(body.links,
.href_url.domain.root_domain == 'weblinkconnect.com'
)
) < 10
and any(body.links,
.href_url.domain.domain == 'api-internal.weblinkconnect.com'
and strings.icontains(.href_url.path, "/click")
and strings.icontains(.href_url.query_params, "url=")
)
and sender.email.domain.root_domain != 'weblinkconnect.com'
and not any(headers.domains, .root_domain == "weblinkinternational.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
)
Detection logic
Scope: inbound message.
Message contains use of the weblinkconnect.com open redirect, but the sender is not weblinkconnect.com. This has been exploited in the wild.
- inbound message
- length(filter(body.links, .href_url.domain.root_domain == 'weblinkconnect.com')) < 10
any of
body.linkswhere all hold:- .href_url.domain.domain is 'api-internal.weblinkconnect.com'
- .href_url.path contains '/click'
- .href_url.query_params contains 'url='
- sender.email.domain.root_domain is not 'weblinkconnect.com'
not:
any of
headers.domainswhere:- .root_domain is 'weblinkinternational.com'
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.domain, body.links[].href_url.domain.root_domain, body.links[].href_url.path, body.links[].href_url.query_params, headers.auth_summary.dmarc.pass, headers.domains, headers.domains[].root_domain, sender.email.domain.root_domain, type.inbound. Sensors: strings.icontains. Reference lists: $high_trust_sender_root_domains.
Indicators matched (5)
| Field | Match | Value |
|---|---|---|
body.links[].href_url.domain.root_domain | equals | weblinkconnect.com |
body.links[].href_url.domain.domain | equals | api-internal.weblinkconnect.com |
strings.icontains | substring | /click |
strings.icontains | substring | url= |
headers.domains[].root_domain | equals | weblinkinternational.com |