Detection rules › Sigma
Created Files by Microsoft Sync Center
This rule detects suspicious files created by Microsoft Sync Center (mobsync)
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 11: FileCreate |
Rule body
title: Created Files by Microsoft Sync Center
id: 409f8a98-4496-4aaa-818a-c931c0a8b832
status: test
description: This rule detects suspicious files created by Microsoft Sync Center (mobsync)
references:
- https://redcanary.com/blog/intelligence-insights-november-2021/
author: elhoim
date: 2022-04-28
modified: 2022-06-02
tags:
- attack.privilege-escalation
- attack.stealth
- attack.t1055
- attack.t1218
- attack.execution
logsource:
product: windows
category: file_event
detection:
selection_mobsync:
Image|endswith: '\mobsync.exe'
filter_created_file:
TargetFilename|endswith:
- '.dll'
- '.exe'
condition: selection_mobsync and filter_created_file
falsepositives:
- Unknown
level: medium
Stages and Predicates
Stage 0: condition
selection_mobsync and filter_created_fileStage 1: selection_mobsync
selection_mobsync:
Image|endswith: '\mobsync.exe'
Stage 2: filter_created_file
filter_created_file:
TargetFilename|endswith:
- '.dll'
- '.exe'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with value:"\mobsync.exe" |
TargetFilename | ends_with |
| field:"TargetFilename" kind:ends_with |