High Severity
Brand Impersonation: MetaMask
Description
Detects inbound messages containing links where the sender impersonates MetaMask through display name manipulation and includes the MetaMask logo or suspicious language, while not being from legitimate MetaMask domains. The rule checks for credential theft patterns and validates sender authentication.
References
No references.
Sublime Security
Created Feb 20th, 2025 • Last updated Feb 24th, 2025
Feed Source
Sublime Core Feed
Source
type.inbound
and length(body.links) > 0
and (
regex.icontains(strings.replace_confusables(sender.display_name),
'\bmetamask\b',
'\bmetamask\.io\b'
)
or strings.contains(strings.replace_confusables(sender.display_name),
"METAMASK"
)
or strings.ilevenshtein(strings.replace_confusables(sender.display_name),
'metamask'
) <= 2
)
and (
any(ml.logo_detect(beta.message_screenshot()).brands, .name == "MetaMask")
or any(ml.nlu_classifier(body.current_thread.text).intents,
.name in ("cred_theft", "callback_scam", "steal_pii")
and .confidence in ("high")
)
)
and sender.email.domain.root_domain not in~ ('metamask.io')
// 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
)
and not profile.by_sender().any_false_positives
Playground
Test against your own EMLs or sample data.