Skip to content

Create attachment_employment_contract_update.yml #3831

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
aidenmitchell merged 5 commits into from
Jan 28, 2026
+22 −0
Merged

Create attachment_employment_contract_update.yml #3831

Changes from 3 commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
9a62fd2
Create attachment_employment_contract_update.yml
MSAdministrator Jan 23, 2026
709c37f
Auto-format MQL and add rule IDs
Jan 23, 2026
bb01d2f
Merge branch 'main' into msadministrator.fn.esc-3262.attachment_emplo…
MSAdministrator Jan 24, 2026
f790c7a
Update detection-rules/attachment_employment_contract_update.yml
MSAdministrator Jan 27, 2026
70f09b3
Auto-format MQL and add rule IDs
Jan 27, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
26 changes: 26 additions & 0 deletions detection-rules/attachment_employment_contract_update.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
name: "Attachment: Employment contract update with suspicious file naming"
description: "Detects messages containing two attachments where one is a PowerPoint file with suspicious character substitution in the filename ('Empl0yment' using zero instead of 'o') and body text claiming an employment contract has been updated."
type: "rule"
severity: "high"
source: |
type.inbound
// two attachments, one png and one pptx
and length(attachments) == 2
// the pptx has Empl0yment in name
and length(filter(attachments,
.content_type == "application/octet-stream"
and strings.contains(.file_name, "Empl0yment")
)
) == 1
and strings.icontains(body.current_thread.text,
"Your Employment Contract has being updated"
)
attack_types:
- "Malware/Ransomware"
tactics_and_techniques:
- "Evasion"
- "Social engineering"
detection_methods:
- "Content analysis"
- "File analysis"
id: "8bdcd2da-c970-5b55-81f8-1b95d3d9dce0"
Loading