Detection rules › Sublime MQL
Open Redirect: asemailmgmteu.com
Message contains use of the asemailmgmteu.com 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
| Message attribute |
|---|
| body |
| body.links (collection) |
| headers.auth_summary |
| sender.email |
| type |
Rule body MQL
type.inbound
and 0 < length(body.links) < 10
and any(body.links,
.href_url.domain.root_domain == "asemailmgmteu.com"
and strings.icontains(.href_url.query_params, 'redirect=')
and .display_text != "unsubscribe"
// negate use of the redirect by asemailmgmteu.com
and not any(.href_url.query_params_decoded["redirect"],
strings.parse_url(.).domain.root_domain == sender.email.domain.root_domain
or strings.parse_url(.).domain.root_domain == "asemailmgmteu.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 asemailmgmteu.com open redirect. This has been exploited in the wild.
- inbound message
all of:
- length(body.links) > 0
- length(body.links) < 10
any of
body.linkswhere all hold:- .href_url.domain.root_domain is 'asemailmgmteu.com'
- .href_url.query_params contains 'redirect='
- .display_text is not 'unsubscribe'
not:
any of
.href_url.query_params_decoded['redirect']where any holds:- strings.parse_url(.).domain.root_domain is sender.email.domain.root_domain
- strings.parse_url(.).domain.root_domain is 'asemailmgmteu.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[].display_text, body.links[].href_url.domain.root_domain, body.links[].href_url.query_params, body.links[].href_url.query_params_decoded['redirect'], headers.auth_summary.dmarc.pass, sender.email.domain.root_domain, type.inbound. Sensors: strings.icontains, strings.parse_url. Reference lists: $high_trust_sender_root_domains.
Indicators matched (2)
| Field | Match | Value |
|---|---|---|
body.links[].href_url.domain.root_domain | equals | asemailmgmteu.com |
strings.icontains | substring | redirect= |