High Severity
Attachment with VBA macros from employee impersonation (unsolicited)
Description
Attachment contains a VBA macro from a sender your organization has never sent an email to.
Sender is using a display name that matches the display name of someone in your organization.
VBA macros are a common phishing technique used to deploy malware.
References
Sublime Security
Created Aug 17th, 2023 • Last updated Feb 26th, 2024
Feed Source
Sublime Core Feed
Source
type.inbound
// ensure the display name contains a space to avoid single named process accounts eg. 'billing, payment'
and strings.contains(sender.display_name, " ")
and sender.display_name in~ $org_display_names
and any(attachments,
(
.file_extension in~ $file_extensions_macros
or .file_extension in~ $file_extensions_common_archives
or (
.file_extension is null
and .file_type == "unknown"
and .content_type == "application/octet-stream"
and .size < 100000000
)
)
and file.oletools(.).indicators.vba_macros.exists
)
and (
not profile.by_sender().solicited
or (
profile.by_sender().any_messages_malicious_or_spam
and not profile.by_sender().any_false_positives
)
)
Playground
Test against your own EMLs or sample data.