Medium Severity
Attachment with encrypted zip (unsolicited)
Description
Recursively scans files and archives to detect encrypted zip files.
References
Sublime Security
Created Aug 17th, 2023 • Last updated Jul 16th, 2025
Feed Source
Sublime Core Feed
Source
type.inbound
and any(attachments,
(.file_type == "zip" or .file_extension == "zip")
and any(file.explode(.), any(.flavors.yara, . == 'encrypted_zip'))
)
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().prevalence == "common"
Playground
Test against your own EMLs or sample data.