Detection rules › Sigma
Exploit for CVE-2017-8759
Detects Winword starting uncommon sub process csc.exe as used in exploits for CVE-2017-8759
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | |
| Execution |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Exploit for CVE-2017-8759
id: fdd84c68-a1f6-47c9-9477-920584f94905
status: test
description: Detects Winword starting uncommon sub process csc.exe as used in exploits for CVE-2017-8759
references:
- https://www.hybrid-analysis.com/sample/0b4ef455e385b750d9f90749f1467eaf00e46e8d6c2885c260e1b78211a51684?environmentId=100
- https://www.reverse.it/sample/0b4ef455e385b750d9f90749f1467eaf00e46e8d6c2885c260e1b78211a51684?environmentId=100
author: Florian Roth (Nextron Systems)
date: 2017-09-15
modified: 2021-11-27
tags:
- attack.execution
- attack.t1203
- attack.t1204.002
- attack.initial-access
- attack.t1566.001
- cve.2017-8759
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith: '\WINWORD.EXE'
Image|endswith: '\csc.exe'
condition: selection
falsepositives:
- Unknown
level: critical
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
ParentImage|endswith: '\WINWORD.EXE'
Image|endswith: '\csc.exe'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with value:"\csc.exe" |
ParentImage | ends_with |
| field:"ParentImage" kind:ends_with value:"\WINWORD.EXE" |