Detection rules › Sublime MQL
Attachment: PDF with eCheckRun lures
Detects PDF attachments matching yara rules looking for attachments containing artifacts from related to fake financial/invoice themes, including eCheckRun lures. These are commonly used to trick users into believe they have received legitmate electronic payment messages.
Threat classification
Sublime's own taxonomy (not MITRE ATT&CK).
| Category | Values |
|---|---|
| Attack types | Credential Phishing |
| Tactics and techniques |
Event coverage
| Message attribute |
|---|
| attachments (collection) |
| type |
Rule body MQL
type.inbound
and any(filter(attachments, .file_type == "pdf"),
any(file.explode(.),
any(.scan.yara.matches, .name in ("pdf_eCheckLure_format", ))
)
)
Detection logic
Scope: inbound message.
Detects PDF attachments matching yara rules looking for attachments containing artifacts from related to fake financial/invoice themes, including eCheckRun lures. These are commonly used to trick users into believe they have received legitmate electronic payment messages.
- inbound message
any of
filter(attachments)where:any of
file.explode(.)where:any of
.scan.yara.matcheswhere:- .name in ('pdf_eCheckLure_format')
Inspects: attachments[].file_type, type.inbound. Sensors: file.explode.
Indicators matched (2)
| Field | Match | Value |
|---|---|---|
attachments[].file_type | equals | pdf |
file.explode(filter(attachments)[])[].scan.yara.matches[].name | member | pdf_eCheckLure_format |