Detection rules › Sublime MQL
Open redirect: secondstreetapp.com
Message contains use of the secondstreetapp.com 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 == "secondstreetapp.com"
and strings.icontains(.href_url.query_params, '&redirect=')
// not redirects to themselves
and not regex.icontains(.href_url.query_params,
'&redirect=[^&]*secondstreetapp\.com'
)
)
// remove uses that originate from secondstreet
and not any(headers.domains,
.root_domain in ("secondstreetmail.com", "secondstreetmessages.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 secondstreetapp.com redirect. This has been exploited in the wild.
- inbound message
any of
body.linkswhere all hold:- .href_url.domain.root_domain is 'secondstreetapp.com'
- .href_url.query_params contains '&redirect='
not:
- .href_url.query_params matches '&redirect=[^&]*secondstreetapp\\.com'
not:
any of
headers.domainswhere:- .root_domain in ('secondstreetmail.com', 'secondstreetmessages.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.root_domain, 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: regex.icontains, strings.icontains. Reference lists: $high_trust_sender_root_domains.
Indicators matched (5)
| Field | Match | Value |
|---|---|---|
body.links[].href_url.domain.root_domain | equals | secondstreetapp.com |
strings.icontains | substring | &redirect= |
regex.icontains | regex | &redirect=[^&]*secondstreetapp\.com |
headers.domains[].root_domain | member | secondstreetmail.com |
headers.domains[].root_domain | member | secondstreetmessages.com |