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 | T1566.001 Phishing: Spearphishing Attachment |
| Execution | T1203 Exploitation for Client Execution, T1204.002 User Execution: Malicious File |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
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
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
Image | ends_with |
|
ParentImage | ends_with |
|