Sublime Security high experimental mql
Brand Impersonation: Google (QR Code)
Detects messages using Google based lures, referencing or including a QR code from an Unsolicited sender. These messages often lead users to phishing sites or initiate unwanted downloads.
Detection Logic
type.inbound
and length(body.current_thread.text) < 1000
and any([subject.subject, sender.display_name, body.current_thread.text],
regex.icontains(.,
'(?:\b2fa\b
| \bQ.?R\.?\s?\b
| MFA
| Muti[ -]?Factor
| Auth(?:enticat
| e
| or
| ion)?)'
)
)
and (
any(attachments,
(
.file_type in $file_types_images
or .file_type == "pdf"
or .file_type in~ $file_extensions_macros
)
and any(ml.logo_detect(.).brands, strings.starts_with(.name, "Google"))
)
or any(ml.logo_detect(file.message_screenshot()).brands,
strings.starts_with(.name, "Google")
)
)
and any(attachments,
(
.file_type in $file_types_images
or .file_type == "pdf"
or .file_type in $file_extensions_macros
)
and (
any(file.explode(.),
regex.icontains(.scan.ocr.raw, 'scan
| camera')
and regex.icontains(.scan.ocr.raw, '\bQR\b
| Q\.R\.
| barcode')
)
or any(file.explode(.),
.scan.qr.type is not null
and regex.contains(.scan.qr.data, '\.')
)
or (
//
// This rule makes use of a beta feature and is subject to change without notice
// using the beta feature in custom rules is not suggested until it has been formally released
//
beta.parse_exif(file.message_screenshot()).image_height < 2000
and beta.parse_exif(file.message_screenshot()).image_width < 2000
and any(beta.scan_qr(file.message_screenshot()).items,
.type is not null and regex.contains(.data, '\.')
)
)
)
)
and (
not profile.by_sender().solicited
or (
profile.by_sender().any_messages_malicious_or_spam
and not profile.by_sender().any_messages_benign
)
)
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 (
any(distinct(headers.hops, .authentication_results.dmarc is not null),
strings.ilike(.authentication_results.dmarc, "*fail")
)
)
)
or sender.email.domain.root_domain not in $high_trust_sender_root_domains
) Field Validations
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